Discovery of the atomic bomb. Creation of the Soviet atomic bomb. "This is atomic lightning"

Within two years, the Heisenberg group carried out the research needed to create an atomic reactor using uranium and heavy water. It was confirmed that only one of the isotopes, namely, uranium-235, contained in very small concentrations in ordinary uranium ore, can serve as an explosive. The first problem was how to isolate it from there. The starting point of the bombing program was an atomic reactor, which required either graphite or heavy water as a reaction moderator. German physicists chose water, thereby creating a serious problem for themselves. After the occupation of Norway, the only heavy water plant in the world at that time passed into the hands of the Nazis. But there, the stock of the product needed by physicists by the beginning of the war was only tens of kilograms, and the Germans did not get them either - the French stole valuable products literally from under the noses of the Nazis. And in February 1943, the British commandos abandoned in Norway, with the help of local resistance fighters, disabled the plant. The implementation of Germany's nuclear program was in jeopardy. The misadventures of the Germans did not end there: an experimental nuclear reactor exploded in Leipzig. The uranium project was supported by Hitler only as long as there was hope of obtaining a super-powerful weapon before the end of the war unleashed by him. Heisenberg was invited by Speer and asked bluntly: "When can we expect the creation of a bomb capable of being suspended from a bomber?" The scientist was honest: "I think it will take several years of hard work, in any case, the bomb will not be able to affect the outcome of the current war." The German leadership rationally considered that there was no point in forcing events. Let scientists work quietly - by the next war, you see, they will have time. As a result, Hitler decided to concentrate scientific, industrial and financial resources only on projects that would give the fastest return in the creation of new types of weapons. State funding for the uranium project was curtailed. Nevertheless, the work of scientists continued.

Manfred von Ardenne, who developed a method for gas diffusion purification and separation of uranium isotopes in a centrifuge.

In 1944, Heisenberg received cast uranium plates for a large reactor plant, under which a special bunker was already being built in Berlin. The last experiment to achieve a chain reaction was scheduled for January 1945, but on January 31, all equipment was hastily dismantled and sent from Berlin to the village of Haigerloch near the Swiss border, where it was deployed only at the end of February. The reactor contained 664 cubes of uranium with a total weight of 1525 kg, surrounded by a graphite neutron moderator-reflector weighing 10 tons. In March 1945, an additional 1.5 tons of heavy water was poured into the core. On March 23, it was reported to Berlin that the reactor had started working. But the joy was premature - the reactor did not reach a critical point, the chain reaction did not start. After recalculations, it turned out that the amount of uranium must be increased by at least 750 kg, proportionally increasing the mass of heavy water. But there were no reserves left. The end of the Third Reich was inexorably approaching. On April 23, American troops entered Haigerloch. The reactor was dismantled and taken to the USA.

Meanwhile across the ocean

In parallel with the Germans (with only a slight lag), the development of atomic weapons was taken up in England and the USA. They began with a letter sent in September 1939 by Albert Einstein to US President Franklin Roosevelt. The initiators of the letter and the authors of most of the text were émigré physicists from Hungary Leo Szilard, Eugene Wigner and Edward Teller. The letter drew the president's attention to the fact that Nazi Germany was conducting active research, as a result of which it could soon acquire an atomic bomb.

In 1933, the German communist Klaus Fuchs fled to England. After receiving a degree in physics from the University of Bristol, he continued to work. In 1941, Fuchs reported his involvement in atomic research to Soviet intelligence agent Jurgen Kuchinsky, who informed Soviet ambassador Ivan Maisky. He instructed the military attache to urgently establish contact with Fuchs, who, as part of a group of scientists, was going to be transported to the United States. Fuchs agreed to work for Soviet intelligence. Many illegal Soviet spies were involved in working with him: the Zarubins, Eitingon, Vasilevsky, Semyonov and others. As a result of their active work, already in January 1945, the USSR had a description of the design of the first atomic bomb. At the same time, the Soviet residency in the United States reported that it would take the Americans at least one year, but no more than five years, to create a significant arsenal of atomic weapons. The report also said that the explosion of the first two bombs might be carried out in a few months. Pictured is Operation Crossroads, a series of atomic bomb tests conducted by the United States on Bikini Atoll in the summer of 1946. The goal was to test the effect of atomic weapons on ships.

In the USSR, the first information about the work carried out by both the allies and the enemy was reported to Stalin by intelligence as early as 1943. It was immediately decided to deploy similar work in the Union. Thus began the Soviet atomic project. Tasks were received not only by scientists, but also by scouts, for whom prey nuclear secrets became a top priority.

The most valuable information about the work on the atomic bomb in the United States, obtained by intelligence, greatly helped the promotion of the Soviet nuclear project. The scientists participating in it managed to avoid dead-end search paths, thereby significantly accelerating the achievement of the final goal.

Experience of Recent Enemies and Allies

Naturally, the Soviet leadership could not remain indifferent to German nuclear developments. At the end of the war, a group of Soviet physicists was sent to Germany, among whom were the future academicians Artsimovich, Kikoin, Khariton, Shchelkin. All were camouflaged in the uniform of colonels of the Red Army. The operation was led by First Deputy People's Commissar of Internal Affairs Ivan Serov, which opened any door. In addition to the necessary German scientists, the “colonels” found tons of metallic uranium, which, according to Kurchatov, reduced work on the Soviet bomb by at least a year. The Americans also took out a lot of uranium from Germany, taking the specialists who worked on the project with them. And in the USSR, in addition to physicists and chemists, they sent mechanics, electrical engineers, glassblowers. Some were found in POW camps. For example, Max Steinbeck, the future Soviet academician and vice-president of the Academy of Sciences of the GDR, was taken away when, at the whim of the head of the camp, he made sundial. In total, at least 1000 German specialists worked on the atomic project in the USSR. From Berlin, the von Ardenne laboratory with a uranium centrifuge, equipment of the Kaiser Institute of Physics, documentation, reagents were completely taken out. Within the framework of the atomic project, laboratories "A", "B", "C" and "G" were created, the scientific supervisors of which were scientists who arrived from Germany.

K.A. Petrzhak and G. N. Flerov In 1940, in the laboratory of Igor Kurchatov, two young physicists discovered a new, very peculiar type of radioactive decay of atomic nuclei - spontaneous fission.

Laboratory "A" was headed by Baron Manfred von Ardenne, a talented physicist who developed a method for gaseous diffusion purification and separation of uranium isotopes in a centrifuge. At first, his laboratory was located on the Oktyabrsky field in Moscow. Five or six Soviet engineers were assigned to each German specialist. Later, the laboratory moved to Sukhumi, and over time, the famous Kurchatov Institute grew up on the Oktyabrsky field. In Sukhumi, on the basis of the von Ardenne laboratory, the Sukhumi Institute of Physics and Technology was formed. In 1947, Ardenne was awarded the Stalin Prize for the creation of a centrifuge for the purification of uranium isotopes on an industrial scale. Six years later, Ardenne became twice a Stalin laureate. He lived with his wife in a comfortable mansion, his wife played music on a piano brought from Germany. Others were not offended German specialists: they came with their families, brought with them furniture, books, paintings, were provided with good salaries and food. Were they prisoners? Academician A.P. Alexandrov, himself an active participant in the atomic project, remarked: "Of course, the German specialists were prisoners, but we ourselves were prisoners."

Nikolaus Riehl, a native of St. Petersburg who moved to Germany in the 1920s, became the head of Laboratory B, which conducted research in the field of radiation chemistry and biology in the Urals (now the city of Snezhinsk). Here Riehl worked with his old acquaintance from Germany, the outstanding Russian biologist-geneticist Timofeev-Resovsky (“Zubr” based on the novel by D. Granin).

In December 1938, German physicists Otto Hahn and Fritz Strassmann for the first time in the world carried out artificial fission of the uranium atom nucleus.

Recognized in the USSR as a researcher and talented organizer, able to find effective solutions to the most complex problems, Dr. Riehl became one of the key figures in the Soviet atomic project. After the successful testing of the Soviet bomb, he became a Hero of Socialist Labor and a laureate of the Stalin Prize.

The work of laboratory "B", organized in Obninsk, was headed by Professor Rudolf Pose, one of the pioneers in the field of nuclear research. Under his leadership, fast neutron reactors were created, the first nuclear power plant in the Union, and the design of reactors for submarines began. The object in Obninsk became the basis for the organization of the A.I. Leipunsky. Pose worked until 1957 in Sukhumi, then at the Joint Institute for Nuclear Research in Dubna.

After the end of World War II, the countries of the anti-Hitler coalition rapidly tried to get ahead of each other in the development of a more powerful nuclear bomb.

The first test, conducted by the Americans on real objects in Japan, heated up the situation between the USSR and the USA to the limit. The powerful explosions that thundered in Japanese cities and practically destroyed all life in them forced Stalin to abandon many claims on the world stage. Most of the Soviet physicists were urgently "thrown" to the development of nuclear weapons.

When and how did nuclear weapons appear

1896 can be considered the year of birth of the atomic bomb. It was then that French chemist A. Becquerel discovered that uranium is radioactive. The chain reaction of uranium forms powerful energy, which serves as the basis for a terrible explosion. It is unlikely that Becquerel imagined that his discovery would lead to the creation of nuclear weapons - the most terrible weapon in the whole world.

The end of the 19th - beginning of the 20th century was a turning point in the history of the invention of nuclear weapons. It is during this time period that scientists various countries of the world were able to discover the following laws, rays and elements:

• Alpha, gamma and beta rays;
• Many isotopes of chemical elements with radioactive properties have been discovered;
• The law of radioactive decay was discovered, which determines the time and quantitative dependence of the intensity of radioactive decay, depending on the number of radioactive atoms in the test sample;
• Nuclear isometry was born.

In the 1930s, for the first time, they were able to split the atomic nucleus of uranium by absorbing neutrons. At the same time, positrons and neurons were discovered. All this gave a powerful impetus to the development of weapons that used atomic energy. In 1939, the world's first atomic bomb design was patented. This was done by French physicist Frederic Joliot-Curie.

As a result of further research and development in this area, a nuclear bomb was born. The power and range of destruction of modern atomic bombs is so great that a country that possesses nuclear capability, practically does not need powerful army, since one atomic bomb is capable of destroying an entire state.

How an atomic bomb works

An atomic bomb consists of many elements, the main of which are:

• Atomic Bomb Corps;
• Automation system that controls the explosion process;
• Nuclear charge or warhead.

The automation system is located in the body of an atomic bomb, along with a nuclear charge. The hull design must be sufficiently reliable to protect the warhead from various external factors and influences. For example, various mechanical, thermal or similar influences, which can lead to an unplanned explosion of great power, capable of destroying everything around.

The task of automation includes complete control over the explosion at the right time, so the system consists of the following elements:

• Device responsible for emergency detonation;
• Power supply of the automation system;
• Undermining sensor system;
• cocking device;
• Safety device.

When the first tests were carried out, nuclear bombs were delivered by planes that had time to leave the affected area. Modern atomic bombs are so powerful that they can only be delivered using cruise, ballistic, or even anti-aircraft missiles.

Atomic bombs use a variety of detonation systems. The simplest of them is a conventional device that is triggered when a projectile hits a target.

One of the main characteristics of nuclear bombs and missiles is their division into calibers, which are of three types:

• Small, the power of atomic bombs of this caliber is equivalent to several thousand tons of TNT;
• Medium (explosion power - several tens of thousands of tons of TNT);
• Large, the charge power of which is measured in millions of tons of TNT.

It is interesting that most often the power of all nuclear bombs is measured precisely in TNT equivalent, since there is no scale for measuring the power of an explosion for atomic weapons.

Algorithms for the operation of nuclear bombs

Any atomic bomb operates on the principle of use nuclear energy released during a nuclear reaction. This procedure is based on either the fission of heavy nuclei or the synthesis of lungs. Since this reaction releases a huge amount of energy, and in the shortest possible time, the radius of destruction of a nuclear bomb is very impressive. Because of this feature, nuclear weapons are classified as weapons mass destruction.

There are two main points in the process that starts with the explosion of an atomic bomb:

• This is the immediate center of the explosion, where the nuclear reaction takes place;
• The epicenter of the explosion, which is located at the site where the bomb exploded.

The nuclear energy released during the explosion of an atomic bomb is so strong that seismic shocks. At the same time, these shocks bring direct destruction only at a distance of several hundred meters (although, given the force of the explosion of the bomb itself, these shocks no longer affect anything).

Damage factors in a nuclear explosion

The explosion of a nuclear bomb brings not only terrible instantaneous destruction. The consequences of this explosion will be felt not only by people who fell into the affected area, but also by their children, who were born after the atomic explosion. Types of destruction by atomic weapons are divided into the following groups:

• Light radiation that occurs directly during the explosion;
• The shock wave propagated by a bomb immediately after the explosion;
• Electromagnetic impulse;
• penetrating radiation;
• A radioactive contamination that can last for decades.

Although at first glance, a flash of light poses the least threat, in fact, it is formed as a result of the release of a huge amount of thermal and light energy. Its power and strength far exceeds the power of the rays of the sun, so the defeat of light and heat can be fatal at a distance of several kilometers.

The radiation that is released during the explosion is also very dangerous. Although it does not last long, it manages to infect everything around, since its penetrating ability is incredibly high.

The shock wave in an atomic explosion acts like the same wave in conventional explosions, only its power and radius of destruction are much larger. In a few seconds, it causes irreparable damage not only to people, but also to equipment, buildings and the surrounding nature.

Penetrating radiation provokes the development of radiation sickness, and an electromagnetic pulse is dangerous only for equipment. The combination of all these factors, plus the power of the explosion, makes the atomic bomb the most dangerous weapon in the world.

The world's first nuclear weapons test

The first country to develop and test nuclear weapons was the United States of America. It was the US government that allocated huge cash subsidies for the development of promising new weapons. By the end of 1941, many prominent scientists in the field of atomic development were invited to the United States, who by 1945 were able to present a prototype atomic bomb suitable for testing.

The world's first test of an atomic bomb equipped with an explosive device was carried out in the desert in the state of New Mexico. A bomb called "Gadget" was detonated on July 16, 1945. The test result was positive, although the military demanded to test a nuclear bomb in real combat conditions.

Seeing that there was only one step left before victory in the Nazi coalition, and there might not be more such an opportunity, the Pentagon decided to launch a nuclear strike on the last ally of Nazi Germany - Japan. In addition, the use of a nuclear bomb was supposed to solve several problems at once:

• To avoid the unnecessary bloodshed that would inevitably occur if US troops set foot on Imperial Japanese territory;
• To bring the uncompromising Japanese to their knees in one blow, forcing them to agree to conditions favorable to the United States;
• Show the USSR (as a possible rival in the future) that the US Army has a unique weapon that can wipe out any city from the face of the earth;
• And, of course, to see in practice what nuclear weapons are capable of in real combat conditions.

On August 6, 1945, the world's first atomic bomb was dropped on the Japanese city of Hiroshima, which was used in military operations. This bomb was called "Baby", as its weight was 4 tons. The bomb drop was carefully planned, and it hit exactly where it was planned. Those houses that were not destroyed by the blast burned down, as the stoves that fell in the houses provoked fires, and the whole city was engulfed in flames.

After a bright flash, a heat wave followed, which burned all life within a radius of 4 kilometers, and the shock wave that followed it destroyed most of the buildings.

Those who were hit by heatstroke within a radius of 800 meters were burned alive. The blast wave tore off the burnt skin of many. A couple of minutes later, a strange black rain fell, which consisted of steam and ash. Those who fell under the black rain, the skin received incurable burns.

Those few who were lucky enough to survive fell ill with radiation sickness, which at that time was not only not studied, but also completely unknown. People began to develop fever, vomiting, nausea and bouts of weakness.

On August 9, 1945, the second American bomb, called "Fat Man", was dropped on the city of Nagasaki. This bomb had about the same power as the first, and the consequences of its explosion were just as devastating, although people died half as much.

Two atomic bombs dropped on Japanese cities turned out to be the first and only case in the world of the use of atomic weapons. More than 300,000 people died in the first days after the bombing. About 150 thousand more died from radiation sickness.

After nuclear bombing Japanese cities, Stalin received a real shock. It became clear to him that the issue of developing nuclear weapons in Soviet Russia was a security issue for the entire country. Already on August 20, 1945, a special committee on atomic energy began to work, which was urgently created by I. Stalin.

Although research in nuclear physics was carried out by a group of enthusiasts back in Tsarist Russia, in Soviet time she wasn't getting enough attention. In 1938, all research in this area was completely stopped, and many nuclear scientists were repressed as enemies of the people. After the nuclear explosions in Japan, the Soviet government abruptly began to restore the nuclear industry in the country.

There is evidence that the development of nuclear weapons was carried out in Nazi Germany, and it was German scientists who finalized the “crude” American atomic bomb, so the US government removed all nuclear specialists and all documents related to the development of nuclear weapons from Germany.

The Soviet intelligence school, which during the war was able to bypass all foreign intelligence services, back in 1943 transferred secret documents related to the development of nuclear weapons to the USSR. At the same time, Soviet agents were introduced into all major American nuclear research centers.

As a result of all these measures, already in 1946, the terms of reference for the manufacture of two Soviet-made nuclear bombs were ready:

• RDS-1 (with plutonium charge);
• RDS-2 (with two parts of the uranium charge).

The abbreviation "RDS" was deciphered as "Russia does itself", which almost completely corresponded to reality.

The news that the USSR was ready to release its nuclear weapons forced the US government to take drastic measures. In 1949, the Troyan plan was developed, according to which it was planned to drop atomic bombs on 70 largest cities in the USSR. Only the fear of a retaliatory strike prevented this plan from being realized.

This alarming information coming from Soviet intelligence officers forced scientists to work in an emergency mode. Already in August 1949, the first atomic bomb produced in the USSR was tested. When the US found out about these tests, the Trojan plan was postponed indefinitely. The era of confrontation between the two superpowers, known in history as the Cold War, began.

The most powerful nuclear bomb in the world, known as the "Tsar bomb" belongs precisely to the period " cold war". Soviet scientists have created the most powerful bomb in the history of mankind. Its capacity was 60 megatons, although it was planned to create a bomb with a capacity of 100 kilotons. This bomb was tested in October 1961. The diameter of the fireball during the explosion was 10 kilometers, and the blast wave flew around Earth three times. It was this test that forced most countries of the world to sign an agreement to end nuclear tests not only in the earth's atmosphere, but even in space.

Although atomic weapons are an excellent means of intimidating aggressive countries, on the other hand, they are capable of extinguishing any military conflicts in the bud, since all parties to the conflict can be destroyed in an atomic explosion.

Creation of the Soviet atomic bomb(military part of the atomic project of the USSR) - fundamental research, development of technologies and their practical implementation in the USSR, aimed at creating weapons of mass destruction using nuclear energy. The events were stimulated to a large extent by the activities in this direction of scientific institutions and the military industry of other countries, primarily Nazi Germany and the United States [ ] . In 1945, on August 6 and 9, American planes dropped two atomic bombs on the Japanese cities of Hiroshima and Nagasaki. Almost half of the civilians died immediately in the explosions, others were seriously ill and continue to die to this day.

Encyclopedic YouTube

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  In 1930-1941, work was actively carried out in the nuclear field.

  In this decade, fundamental radiochemical research was carried out, without which a complete understanding of these problems, their development, and, even more so, their implementation, is generally unthinkable.

  Work in 1941-1943

  Foreign intelligence information

  As early as September 1941, the USSR began to receive intelligence information about the conduct of secret intensive research work in the UK and the USA aimed at developing methods for using atomic energy for military purposes and creating atomic bombs of enormous destructive power. One of the most important received back in 1941 Soviet intelligence, documents is the report of the British "Committee MAUD". From the materials of this report, received through the channels of foreign intelligence NKVD USSR from Donald MacLean, it followed that the creation of an atomic bomb was real, that it could probably be created even before the end of the war and, therefore, could affect its course.

  Intelligence information about work on the problem of atomic energy abroad, which was available in the USSR at the time the decision was made to resume work on uranium, was obtained both through the channels of the NKVD intelligence and through the channels of the Main Intelligence Directorate of the General Staff (GRU) of the Red Army.

  In May 1942, the leadership of the GRU informed the Academy of Sciences of the USSR about the presence of reports of work abroad on the problem of using atomic energy for military purposes and asked to be informed whether this problem currently has a real practical basis. In June 1942, the answer to this request was given by V. G. Khlopin, who noted that over the past year, almost no works related to the solution of the problem of using atomic energy have been published in the scientific literature.

  An official letter from the head of the NKVD L.P. Beria addressed to I.V. Stalin with information about the work on the use of atomic energy for military purposes abroad, proposals for organizing these works in the USSR and secret acquaintance with the materials of the NKVD of prominent Soviet specialists, the variants of which were prepared by the NKVD officers back in late 1941 - early 1942, it was sent to I.V. Stalin only in October 1942, after the adoption of the GKO order to resume work on uranium in the USSR.

  Soviet intelligence had detailed information about the work on the creation of an atomic bomb in the United States, coming from specialists who understood the danger of a nuclear monopoly or sympathizers of the USSR, in particular, Klaus Fuchs, Theodor Hall, Georges Koval and David Greenglass. However, according to some, a letter addressed to Stalin at the beginning of 1943 by the Soviet physicist G. Flerov, who managed to explain the essence of the problem in a popular way, was of decisive importance. On the other hand, there is reason to believe that G. N. Flerov's work on the letter to Stalin was not completed and it was not sent.

  The hunt for data from America's uranium project began at the initiative of Leonid Kvasnikov, head of the NKVD scientific and technical intelligence department, as early as 1942, but only fully unfolded after the arrival in Washington of the famous couple of Soviet intelligence officers: Vasily Zarubin and his wife Elizaveta. It was with them that the resident of the NKVD in San Francisco, Grigory Kheifits, interacted, saying that the most prominent American physicist Robert Oppenheimer and many of his colleagues left California for an unknown place where they would be creating some kind of superweapon.

  To double-check the data of "Charon" (this was the code name of Heifitz) was entrusted to Lieutenant Colonel Semyon Semenov (pseudonym "Twain"), who had worked in the United States since 1938 and had assembled a large and active intelligence group there. It was Twain who confirmed the reality of the work on the creation of the atomic bomb, named the code for the Manhattan Project and the location of its main scientific center - the former colony for juvenile delinquents Los Alamos in New Mexico. Semyonov also gave the names of some scientists who worked there, who at one time were invited to the USSR to participate in large Stalinist construction projects and who, having returned to the USA, did not lose ties with the extreme left organizations.

  Thus, Soviet agents were introduced into the scientific and design centers of America, where a nuclear weapon was created. However, in the midst of establishing intelligence operations, Lisa and Vasily Zarubin were urgently recalled to Moscow. They were lost in conjecture, because not a single failure happened. It turned out that the Center received a denunciation from Mironov, an employee of the residency, who accused the Zarubins of treason. And for almost half a year, Moscow counterintelligence checked these accusations. They were not confirmed, however, the Zarubins were no longer allowed to go abroad.

  In the meantime, the work of the embedded agents had already brought the first results - reports began to arrive, and they had to be immediately sent to Moscow. This work was entrusted to a group of special couriers. The most operative and fearless were the Coens, Maurice and Lona. After Maurice was drafted into the US Army, Lona began to independently deliver information materials from New Mexico to New York. To do this, she traveled to the small town of Albuquerque, where, for appearances, she visited a tuberculosis dispensary. There she met with agents undercover nicknames "Mlad" and "Ernst".

  However, the NKVD still managed to extract several tons of low-enriched uranium in.

  The primary tasks were the organization of industrial production of plutonium-239 and uranium-235. To solve the first problem, it was necessary to create experimental, and then industrial nuclear reactors, the construction of radiochemical and special metallurgical shops. To solve the second problem, the construction of a plant for the separation of uranium isotopes by the diffusion method was launched.

  The solution of these problems turned out to be possible as a result of the creation of industrial technologies, the organization of production and the development of the necessary large quantities of pure metallic uranium, uranium oxide, uranium hexafluoride, other uranium compounds, high purity graphite and a number of other special materials, the creation of a complex of new industrial units and devices. Insufficient production uranium ore and production of uranium concentrates in the USSR (the first plant for the production of uranium concentrate - "Combine No. 6 NKVD USSR" in Tajikistan was founded in 1945) during this period was compensated by trophy raw materials and products of uranium enterprises of Eastern Europe, with which the USSR entered into appropriate agreements.

  In 1945, the Government of the USSR made the following major decisions:

  • on the creation on the basis of the Kirov Plant (Leningrad) of two special experimental design bureaus designed to develop equipment for the production of uranium enriched in the isotope 235 by the gaseous diffusion method;
  • on the start of construction in the Middle Urals (near the village of Verkh-Neyvinsky) of a diffusion plant for the production of enriched uranium-235;
  • on the organization of a laboratory for work on the creation of heavy water reactors on natural uranium;
  • on the choice of a site and the start of construction in the South Urals of the country's first enterprise for the production of plutonium-239.

  The structure of the enterprise in the South Urals was to include:

  • uranium-graphite reactor on natural (natural) uranium (Plant "A");
  • radiochemical production for the separation of plutonium-239 from natural (natural) uranium irradiated in the reactor (plant "B");
  • chemical and metallurgical production for the production of high-purity metallic plutonium (Plant "B").

  Participation of German specialists in the nuclear project

  In 1945, hundreds of German scientists related to the nuclear problem were brought from Germany to the USSR. Most of(about 300 people) were brought to Sukhumi and secretly placed in the former estates of Grand Duke Alexander Mikhailovich and the millionaire Smetsky (Sinop and Agudzery sanatoriums). Equipment from the German Institute of Chemistry and Metallurgy was taken to the USSR, Institute of Physics Kaiser Wilhelm, Siemens Electrotechnical Laboratories, Physical Institute of the German Post Office. Three of the four German cyclotrons, powerful magnets, electron microscopes, oscilloscopes, high voltage transformers, ultra-precise instruments were brought to the USSR. In November 1945, the Directorate was created as part of the NKVD of the USSR. special institutes(9th Directorate of the NKVD of the USSR) to guide the work on the use of German specialists.

  Sanatorium "Sinop" was called "Object" A "" - it was led by Baron Manfred von Ardenne. "Agudzers" became "Object" G "" - it was headed by Gustav  Hertz. Outstanding scientists worked at objects "A" and "G" - Nikolaus Riehl, Max Vollmer, who built the first heavy water production plant in the USSR, Peter Thyssen, designer of nickel filters for gas diffusion separation of uranium isotopes, Max Steenbeck and Gernot Zippe, who worked on centrifuge separation method and subsequently received patents for gas centrifuges in the west. On the basis of objects "A" and "G" was later created (SFTI).

  Some leading German specialists were awarded USSR government awards for this work, including the Stalin Prize.

  In the period 1954-1959, German specialists at different times moved to the GDR (Gernot Zippe - to Austria).

  Construction of a gas diffusion plant in Novouralsk

  In 1946, at the production base of plant No. 261 of the People's Commissariat of Aviation Industry in Novouralsk, the construction of a gas diffusion plant began, which was called Combine No. 813 (Plant D-1)) and intended for the production of highly enriched uranium. The plant gave the first production in 1949.

  Construction of uranium hexafluoride production in Kirovo-Chepetsk

  Over time, a whole complex of industrial enterprises, buildings and structures was erected on the site of the selected construction site, interconnected by a network of roads and railways, a system of heat and power supply, industrial water supply and sewerage. At different times, the secret city was called differently, but the most famous name is Chelyabinsk-40 or Sorokovka. At present, the industrial complex, which was originally called plant No. 817, is called the Mayak production association, and the city on the shore of Lake Irtyash, in which Mayak workers and their families live, was named Ozyorsk.

  In November 1945, geological surveys began at the selected site, and from the beginning of December, the first builders began to arrive.

  The first head of construction (1946-1947) was Ya. D. Rappoport, later he was replaced by Major General M. M. Tsarevsky. The chief construction engineer was V. A. Saprykin, the first director of the future enterprise was P. T. Bystrov (from April 17, 1946), who was replaced by E. P. Slavsky (from July 10, 1947), and then B. G Muzrukov (since December 1, 1947). I. V. Kurchatov was appointed scientific director of the plant.

  Construction of Arzamas-16

  Products

  Development of the design of atomic bombs

  Decree of the Council of Ministers of the USSR No. 1286-525ss "On the plan for the deployment of KB-11 at Laboratory No. 2 of the USSR Academy of Sciences" defined the first tasks of KB-11: the creation under the scientific supervision of Laboratory No. 2 (Academician I. V. Kurchatov) of atomic bombs, conventionally named in the resolution "jet engines C", in two versions: RDS-1 - an implosion type with plutonium and a cannon-type atomic bomb RDS-2 with uranium-235.

  Tactical and technical specifications for the design of the RDS-1 and RDS-2 were to be developed by July 1, 1946, and the designs of their main components - by July 1, 1947. The fully manufactured RDS-1 bomb was to be presented for state tests for an explosion when installed on the ground by January 1, 1948, in an aviation version - by March 1, 1948, and the RDS-2 bomb - by June 1, 1948 and January 1, 1949, respectively. be carried out in parallel with the organization in KB-11 of special laboratories and the deployment of these laboratories. Such tight deadlines and the organization of parallel work also became possible due to the receipt in the USSR of some intelligence data on American atomic bombs.

  Research laboratories and design departments of KB-11 began to expand their activities directly in

  Truth in the penultimate instance

  There are not many things in the world that are considered indisputable. Well, the sun rises in the east and sets in the west, I think you know. And that the Moon revolves around the Earth, too. And about the fact that the Americans were the first to create an atomic bomb, ahead of both the Germans and the Russians.

  So did I, until four years ago an old magazine fell into my hands. He left my beliefs about the sun and the moon alone, but faith in American leadership was shaken quite seriously. It was a plump volume in German, a 1938 binder of Theoretical Physics. I don’t remember why I got there, but quite unexpectedly I came across an article by Professor Otto Hahn.

  The name was familiar to me. It was Hahn, the famous German physicist and radiochemist, who in 1938, together with another prominent scientist, Fritz Straussmann, discovered the fission of the uranium nucleus, in fact, starting work on the creation of nuclear weapons. At first, I just skimmed through the article diagonally, but then completely unexpected phrases made me become more attentive. And, ultimately, even forget about why I originally picked up this magazine.

  Gan's article was devoted to an overview of nuclear developments in different countries of the world. As a matter of fact, there was nothing special to review: everywhere except Germany, nuclear research was in the pen. They didn't see much point. " This abstract matter has nothing to do with state needs., said British Prime Minister Neville Chamberlain around the same time when he was asked to support British atomic research with public money.

  « Let these bespectacled scientists look for money themselves, the state has a lot of other problems!" — this was the opinion of most world leaders in the 1930s. Except, of course, the Nazis, who just financed the nuclear program.
  But it was not Chamberlain's passage, carefully quoted by Hahn, that caught my attention. England does not interest the author of these lines much at all. Much more interesting was what Hahn wrote about the state of nuclear research in the United States of America. And he literally wrote the following:

  If we talk about the country in which the processes of nuclear fission are given the least attention, then the United States should undoubtedly be called. Of course, now I am not considering Brazil or the Vatican. However among developed countries, even Italy and communist Russia are far ahead of the United States. Little attention is paid to the problems of theoretical physics on the other side of the ocean, priority is given to applied developments that can give immediate profit. Therefore, I can state with confidence that during the next decade the North Americans will not be able to do anything significant for the development of atomic physics.

  At first I just laughed. Wow, how wrong my compatriot! And only then I thought: whatever one may say, Otto Hahn was not a simpleton or an amateur. He was well informed about the state of atomic research, especially since before the outbreak of World War II this topic was freely discussed in scientific circles.

  Maybe the Americans misinformed the whole world? But for what purpose? No one even thought about nuclear weapons in the 1930s. Moreover, most scientists considered its creation impossible in principle. That is why, until 1939, the whole world instantly learned about all the new achievements in atomic physics - they were completely openly published in scientific journals. No one hid the fruits of their labor, on the contrary, there was an open rivalry between different groups of scientists (almost exclusively Germans) - who will move forward faster?

  Maybe scientists in the States were ahead of the whole world and therefore kept their achievements a secret? Nonsense assumption. To confirm or refute it, we will have to consider the history of the creation of the American atomic bomb - at least as it appears in official publications. We are all accustomed to take it on faith as a matter of course. However, upon closer examination, there are so many oddities and inconsistencies in it that you simply wonder.

  With the world on a string - US bomb

  1942 began well for the British. German invasion of their small island, which seemed inevitable, now, as if by magic, retreated into the misty distance. Last summer, Hitler made the biggest mistake of his life - he attacked Russia. This was the beginning of the end. The Russians not only held out against the hopes of the Berlin strategists and the pessimistic forecasts of many observers, but also gave the Wehrmacht a good punch in the teeth in a frosty winter. And in December, the big and powerful United States came to the aid of the British and was now an official ally. In general, there were more than enough reasons for joy.

  Only a few high-ranking officials who owned the information that British intelligence had received were not happy. At the end of 1941, the British became aware that the Germans were developing their atomic research at a frantic pace.. The ultimate goal of this process became clear - a nuclear bomb. The British atomic scientists were competent enough to imagine the threat posed by the new weapon.

  At the same time, the British had no illusions about their capabilities. All the resources of the country were directed to elementary survival. Although the Germans and Japanese were up to their necks in the war with the Russians and the Americans, from time to time they found an opportunity to poke their fist into the decrepit building of the British Empire. From each such poke, the rotten building staggered and creaked, threatening to collapse.

  Rommel's three divisions fettered almost the entire combat-ready British army in North Africa. Admiral Dönitz's submarines, like predatory sharks, darted across the Atlantic, threatening to interrupt the vital supply chain from across the ocean. Britain simply did not have the resources to engage the Germans in nuclear race . The backlog was already large, and in the very near future it threatened to become hopeless.

  I must say that the Americans were initially skeptical about such a gift. The military department point-blank did not understand why it should spend money on some obscure project. What other new weapons are there? Here are aircraft carrier groups and armadas of heavy bombers - yes, this is strength. And the nuclear bomb, which scientists themselves imagine very vaguely, is just an abstraction, grandmother's tales.

  British Prime Minister Winston Churchill had to directly turn to American President Franklin Delano Roosevelt with a request, literally a plea, not to reject the British gift. Roosevelt called the scientists to him, figured out the issue and gave the go-ahead.

  Usually the creators of the canonical legend of the American bomb use this episode to emphasize the wisdom of Roosevelt. Look, what a shrewd president! We will look at it a little differently: in what pen were the Yankees in atomic research, if they so long and stubbornly refused to cooperate with the British! So Gan was absolutely right in his assessment of the American nuclear scientists - they were nothing solid.

  

  Only in September 1942 was it decided to start work on the atomic bomb. The organizational period took some more time, and things really got off the ground only with the advent of the new year, 1943. From the army, General Leslie Groves headed the work (later he would write memoirs in which he would detail official version taking place), the real leader was Professor Robert Oppenheimer. I will talk about it in detail a little later, but for now let's admire another curious detail - how the team of scientists who began work on the bomb was formed.

  In fact, when Oppenheimer was asked to recruit specialists, he had very little choice. Good nuclear physicists in the States could be counted on the fingers of a crippled hand. Therefore, the professor made a wise decision - to recruit people whom he knows personally and whom he can trust, regardless of what area of ​​\u200b\u200bphysics they were engaged in before. And so it turned out that the lion's share of the seats was occupied by employees of Columbia University from Manhattan County (by the way, that is why the project was called Manhattan).

  But even these forces were not enough. British scientists had to be involved in the work, literally devastating British research centers, and even specialists from Canada. In general, the Manhattan Project turned into a kind of Tower of Babel, with the only difference being that all of its participants spoke at the very least the same language. However, this did not save us from the usual quarrels and squabbles in the scientific community, which arose due to the rivalry of different scientific groups. Echoes of these frictions can be found on the pages of Groves' book, and they look very funny: the general, on the one hand, wants to convince the reader that everything was decorous and decent, and on the other hand, to boast how deftly he managed to reconcile completely quarreling scientific luminaries.

  And now they are trying to convince us that in this friendly atmosphere of a large terrarium, the Americans managed to create an atomic bomb in two and a half years. And the Germans, who pored over their nuclear project merrily and amicably for five years, did not succeed. Miracles, and nothing more.

  However, even if there were no squabbles, such record terms would still arouse suspicion. The fact is that in the process of research it is necessary to go through certain stages, which are almost impossible to reduce. The Americans themselves attribute their success to gigantic funding - in the end, More than two billion dollars were spent on the Manhattan Project! However, no matter how you feed a pregnant woman, she still will not be able to give birth to a full-term baby before nine months. It is the same with the nuclear project: it is impossible to significantly speed up, for example, the process of uranium enrichment.

  The Germans worked for five years with full effort. Of course, they also had mistakes and miscalculations that took up precious time. But who said that the Americans had no mistakes and miscalculations? There were, and many. One of these mistakes was the involvement of the famous physicist Niels Bohr.

  Skorzeny's unknown operation

  British intelligence services are very fond of boasting about one of their operations. We are talking about the salvation of the great Danish scientist Niels Bohr from Nazi Germany. The official legend says that after the outbreak of World War II, the outstanding physicist lived quietly and calmly in Denmark, leading a rather secluded lifestyle. The Nazis offered him cooperation many times, but Bohr invariably refused.

  By 1943, the Germans nevertheless decided to arrest him. But, warned in time, Niels Bohr managed to escape to Sweden, from where the British took him out in the bomb bay heavy bomber. By the end of the year, the physicist was in America and began to work zealously for the benefit of the Manhattan Project.

  The legend is beautiful and romantic, only it is sewn with white thread and does not withstand any tests.. There is no more credibility in it than in the fairy tales of Charles Perrault. Firstly, because the Nazis look like complete idiots in it, and they never were like that. Think well! In 1940 the Germans occupied Denmark. They know that a Nobel laureate lives on the territory of the country, who can be of great help to them in their work on the atomic bomb. The same atomic bomb, which is vital for the victory of Germany.

  And what do they do? They occasionally visit the scientist for three years, politely knock on the door and quietly ask: “ Herr Bohr, do you want to work for the benefit of the Fuhrer and the Reich? You do not want? Okay, we'll come back later.". No, this was not the way the German secret services worked! Logically, they should have arrested Bohr not in 1943, but in 1940. If possible, force (precisely force, not beg!) to work for them, if not, at least make sure that he cannot work for the enemy: put him in a concentration camp or destroy him. And they leave him to roam free, under the noses of the British.

  Three years later, the legend goes, the Germans finally realize that they are supposed to arrest the scientist. But then someone (namely someone, because I have not found any indication of who did it) warns Bohr of the imminent danger. Who could it be? It was not the habit of the Gestapo to shout at every corner about impending arrests. People were taken quietly, unexpectedly, at night. So, the mysterious patron of Bor is one of the rather high-ranking officials.

  Let's leave this mysterious angel-savior alone for now and continue to analyze the wanderings of Niels Bohr. So the scientist fled to Sweden. How do you think, how? On a fishing boat, avoiding German Coast Guard boats in the fog? On a raft made of boards? No matter how! Bor, with the greatest possible comfort, sailed to Sweden on the most ordinary private steamer, which officially entered the port of Copenhagen.

  Let's not puzzle over the question of how the Germans released the scientist if they were going to arrest him. Let's think about this better. The flight of a world-famous physicist is an emergency on a very serious scale. On this occasion, an investigation was inevitably to be carried out - the heads of those who screwed up the physicist, as well as the mysterious patron, would have flown. However, no traces of such an investigation could be found. Maybe because it didn't exist.

  Indeed, how valuable was Niels Bohr for the development of the atomic bomb? Born in 1885 and becoming a Nobel laureate in 1922, Bohr turned to the problems of nuclear physics only in the 1930s. At that time, he was already a major, accomplished scientist with well-formed views. Such people rarely succeed in areas that require an innovative approach and out-of-the-box thinking - and nuclear physics was such a field. For several years, Bohr failed to make any significant contribution to atomic research.

  However, as the ancients said, the first half of life a person works for the name, the second - the name for the person. With Niels Bohr, this second half has already begun. Having taken up nuclear physics, he automatically began to be considered a major specialist in this field, regardless of his real achievements.

  But in Germany, where such world-famous nuclear scientists as Hahn and Heisenberg worked, the real value of the Danish scientist was known. That is why they did not actively try to involve him in the work. It will turn out - good, we will trumpet to the whole world that Niels Bohr himself is working for us. If it doesn’t work out, it’s also not bad, it won’t get underfoot with its authority.

  By the way, in the United States, Niels Bohr to a large extent got in the way. The fact is that an outstanding physicist did not believe at all in the possibility of creating a nuclear bomb. At the same time, his authority forced to reckon with his opinion. According to Groves' memoirs, the scientists working on the Manhattan Project treated Bohr like an elder. Now imagine that you are doing some difficult work without any confidence in the final success. And then someone whom you consider a great specialist comes up to you and says that it’s not even worth spending time on your lesson. Will the job get easier? I don't think.

  In addition, Bohr was a staunch pacifist. In 1945, when the US already had an atomic bomb, he vehemently protested its use. Accordingly, he treated his work with coolness. Therefore, I urge you to think again: what did Bohr bring more - movement or stagnation in the development of the issue?

  It's a strange picture, isn't it? It began to clear up a little after I learned one interesting detail, which seemed to have nothing to do with Niels Bohr or the atomic bomb. We are talking about the "main saboteur of the Third Reich" Otto Skorzeny.

  It is believed that Skorzeny's rise began after he released Italian dictator Benito Mussolini from prison in 1943. Imprisoned in a mountain prison by his former associates, Mussolini could not, it would seem, hope for release. But Skorzeny, on the direct instructions of Hitler, developed a daring plan: to land troops in gliders and then fly away in a small airplane. Everything turned out perfectly: Mussolini is free, Skorzeny is held in high esteem.

  

  At least that's what most people think. Only a few well-informed historians know that cause and effect are confused here. Skorzeny was entrusted with an extremely difficult and responsible task precisely because Hitler trusted him. That is, the rise of the "king of special operations" began before the story of Mussolini's rescue. However, very soon - a couple of months. Skorzeny was promoted in rank and position exactly when Niels Bohr fled to England. I couldn't find any reason to upgrade.

  So we have three facts:
  — firstly, the Germans did not prevent Niels Bohr from leaving for Britain;
  — Secondly, Boron did more harm than good to Americans;
  — third, immediately after the scientist ended up in England, Skorzeny gets a promotion.

  But what if these are the details of one mosaic? I decided to try to reconstruct the events. Having captured Denmark, the Germans were well aware that Niels Bohr was unlikely to assist in the creation of an atomic bomb. Moreover, it will rather interfere. Therefore, he was left to live in peace in Denmark, under the very nose of the British. Maybe even then the Germans expected that the British would kidnap the scientist. However, for three years the British did not dare to do anything.

  At the end of 1942, vague rumors began to reach the Germans about the start of a large-scale project to create an American atomic bomb. Even given the secrecy of the project, it was absolutely impossible to keep the awl in the bag: the instant disappearance of hundreds of scientists from different countries, one way or another connected with nuclear research, should have pushed anyone mentally normal person to such conclusions.

  The Nazis were sure that they were far ahead of the Yankees (and this was true), but this did not prevent the enemy from doing something nasty. And at the beginning of 1943, one of the most secret operations of the German special services was carried out. On the threshold of Niels Bohr's house, a certain well-wisher appears who tells him that they want to arrest him and throw him into a concentration camp, and offers his help. The scientist agrees - he has no other choice, being behind barbed wire is not the best prospect.

  At the same time, apparently, the British are being lied to about the complete indispensability and uniqueness of Bohr in the field of nuclear research. The British are pecking - and what can they do if the prey itself goes into their hands, that is, to Sweden? And for complete heroism, Bora is taken out of there in the belly of a bomber, although they could comfortably send him on a ship.

  And then the Nobel laureate appears at the epicenter of the Manhattan Project, producing the effect of an exploding bomb. That is, if the Germans managed to bomb the research center at Los Alamos, the effect would be about the same. Work has slowed down, moreover, very significantly. Apparently, the Americans did not immediately realize how they were cheated, and when they realized, it was already too late.
  Do you still believe that the Yankees built the atomic bomb themselves?

  Mission "Alsos"

  Personally, I finally refused to believe in these tales after I studied in detail the activities of the Alsos group. This operation of the American intelligence services was kept secret for many years - until they went into better world its main members. And only then did information come to light - albeit fragmentary and scattered - about how the Americans hunted for German atomic secrets.

  True, if you thoroughly work on this information and compare it with some well-known facts, the picture turned out to be very convincing. But I won't get ahead of myself. So, the Alsos group was formed in 1944, on the eve of the landing of the Anglo-Americans in Normandy. Half of the members of the group are professional intelligence officers, half are nuclear scientists.

  At the same time, in order to form Alsos, the Manhattan Project was mercilessly robbed - in fact, the best specialists were taken from there. The task of the mission was to collect information about the German atomic program. The question is, how desperate were the Americans in the success of their undertaking, if they made the main bet on stealing the atomic bomb from the Germans?
  It was great to despair, if we recall a little-known letter from one of the atomic scientists to his colleague. It was written on February 4, 1944 and read:

  « It looks like we're in a hopeless case. The project is not moving forward one iota. Our leaders, in my opinion, do not believe in the success of the whole undertaking at all. Yes, and we do not believe. If it were not for the huge money that we are paid here, I think many would have been doing something more useful long ago.».

  This letter was cited at one time as proof of American talents: look, they say, what good fellows we are, in a little over a year we pulled out a hopeless project! Then in the USA they realized that not only fools live around, and they hurried to forget about the piece of paper. With great difficulty I managed to dig up this document in an old scientific journal.

  They spared no money and effort to ensure the actions of the Alsos group. She was well equipped with everything you need. The head of the mission, Colonel Pash, had a document from US Secretary of Defense Henry Stimson, which obligated everyone to provide the group with all possible assistance. Even Commander-in-Chief of the Allied Forces Dwight Eisenhower did not have such powers.. By the way, about the commander-in-chief - he was obliged to take into account the interests of the Alsos mission in planning military operations, that is, to capture in the first place those areas where German atomic weapons could be.

  At the beginning of August 1944, to be precise - on the 9th, the Alsos group landed in Europe. One of the leading US nuclear scientists, Dr. Samuel Goudsmit, was appointed scientific director of the mission. Before the war, he maintained close ties with his German colleagues, and the Americans hoped that the "international solidarity" of scientists would be stronger than political interests.

  Alsos managed to achieve the first results after the Americans occupied Paris in the fall of 1944.. Here Goudsmit met with the famous French scientist Professor Joliot-Curie. Curie seemed sincerely happy about the defeats of the Germans; however, as soon as it came to the German atomic program, he went into a deaf "unconscious". The Frenchman insisted that he did not know anything, had not heard anything, the Germans did not even come close to developing an atomic bomb, and in general their nuclear project was of an exclusively peaceful nature.

  It was clear that the professor was missing something. But there was no way to put pressure on him - for cooperation with the Germans in what was then France, they were shot, regardless of scientific merits, and Curie was clearly afraid of death most of all. Therefore, Goudsmit had to leave without salty slurping.

  Throughout his stay in Paris, vague but threatening rumors constantly reached him: uranium bomb exploded in Leipzig, in the mountainous regions of Bavaria, strange outbreaks are noted at night. Everything indicated that the Germans were either very close to creating atomic weapons or had already created them.

  What happened next is still shrouded in mystery. They say that Pasha and Goudsmit still managed to find some valuable information in Paris. Since November at least, Eisenhower has received constant demands to move forward into German territory at any cost. The initiators of these demands - now it's clear! - in the end, it turned out to be people associated with the atomic project and who received information directly from the Alsos group. Eisenhower did not have a real opportunity to carry out the orders received, but the demands from Washington became more and more stringent. It is not known how all this would have ended if the Germans had not made another unexpected move.

  Ardennes riddle

  In fact, by the end of 1944, everyone believed that Germany had lost the war. The only question is how long the Nazis will be defeated. It seems that only Hitler and his closest associates adhered to a different point of view. They tried to delay the moment of the catastrophe until the last moment.

  This desire is quite understandable. Hitler was sure that after the war he would be declared a criminal and would be tried. And if you play for time, you can get a quarrel between the Russians and the Americans and, ultimately, get out of the water, that is, out of the war. Not without losses, of course, but without losing power.

  Let's think: what was needed for this in conditions when Germany had nothing left of forces? Naturally, spend them as sparingly as possible, keep a flexible defense. And Hitler, at the very end of the 44th, throws his army into a very wasteful Ardennes offensive. What for?

  The troops are given completely unrealistic tasks - to break through to Amsterdam and throw the Anglo-Americans into the sea. Before Amsterdam, German tanks were at that time like walking to the moon, especially since fuel splashed in their tanks for less than half the way. Scare allies? But what could frighten well-fed and armed armies, behind which was the industrial power of the United States?

  All in all, Until now, not a single historian has been able to clearly explain why Hitler needed this offensive. Usually everyone ends with the argument that the Fuhrer was an idiot. But in fact, Hitler was not an idiot, moreover, he thought quite sensibly and realistically until the very end. Idiots can rather be called those historians who make hasty judgments without even trying to figure something out.

  But let's look at the other side of the front. There are even more amazing things going on! And it's not even that the Germans managed to achieve initial, albeit rather limited, successes. The fact is that the British and Americans were really scared! Moreover, the fear was completely inadequate to the threat. After all, from the very beginning it was clear that the Germans had few forces, that the offensive was local in nature ...

  So no, and Eisenhower, and Churchill, and Roosevelt simply fall into a panic! In 1945, on January 6, when the Germans were already stopped and even driven back, British Prime Minister writes panic letter to Russian leader Stalin which requires immediate assistance. Here is the text of this letter:

  « Very heavy fighting is going on in the West, and at any time from High Command may be required big decisions. You yourself know from your own experience how disturbing is the situation when one has to defend a very wide front after a temporary loss of initiative.

  It is highly desirable and necessary for General Eisenhower to know in in general terms what you intend to do, since this, of course, will affect all of his and our major decisions. According to the message received, our emissary Air Chief Marshal Tedder was in Cairo last night, weather-bound. His trip was greatly delayed through no fault of yours.

  If he has not yet arrived to you, I shall be grateful if you can let me know if we can count on a major Russian offensive on the Vistula front or somewhere else during January and at any other points that you may you wish to mention. I will not pass on this very classified information, with the exception of Field Marshal Brooke and General Eisenhower, and only on condition that it be kept in the strictest confidence. I consider the matter urgent».

  If you translate from diplomatic language into ordinary: save us, Stalin, they will beat us! Therein lies another mystery. What kind of "beat" if the Germans have already been thrown back to the starting lines? Yes, of course, the American offensive, planned for January, had to be postponed to the spring. So what? We must rejoice that the Nazis squandered their strength in senseless attacks!

  And further. Churchill slept and saw how to keep the Russians out of Germany. And now he is literally begging them to start moving west without delay! To what extent should Sir Winston Churchill be frightened?! It seems that the slowdown in the advance of the Allies deep into Germany was interpreted by him as a mortal threat. I wonder why? After all, Churchill was neither a fool nor an alarmist.

  And yet, the Anglo-Americans spend the next two months in terrible nervous tension. Subsequently, they will carefully hide it, but the truth will still break through to the surface in their memoirs. For example, Eisenhower after the war will call the last war winter "the most disturbing time."

  What worried the marshal so much if the war was actually won? Only in March 1945 did the Ruhr operation begin, during which the Allies occupied West Germany, surrounding 300,000 Germans. The commander of the German troops in the area, Field Marshal Model, shot himself (the only one of the entire German generals, by the way). Only after this did Churchill and Roosevelt more or less calm down.

  But back to the Alsos group. In the spring of 1945, it noticeably intensified. During the Ruhr operation, scientists and intelligence officers moved forward almost after the vanguard of the advancing troops, collecting a valuable harvest. In March-April, many scientists involved in German nuclear research fall into their hands. The decisive find was made in mid-April - on the 12th, members of the mission write that they stumbled upon "a real gold mine and now they are "learning about the project basically". By May, Heisenberg, and Hahn, and Osenberg, and Diebner, and many other outstanding German physicists were in the hands of the Americans. Nevertheless, the Alsos group continued active searches in the already defeated Germany ... until the end of May.

  But at the end of May, something strange happens. The search is almost over. Rather, they continue, but with much less intensity. If earlier they were engaged in by prominent world-famous scientists, now they are beardless laboratory assistants. And the big scientists pack their things in droves and leave for America. Why?

  

  To answer this question, let's see how events developed further.

  At the end of June, the Americans conduct tests of an atomic bomb - allegedly the first in the world.
  And in early August, they drop two on Japanese cities.
  After that, the Yankees run out of ready-made atomic bombs, and for quite a long time.

  Strange situation, isn't it? Let's start with the fact that only a month passes between testing and combat use of a new superweapon. Dear readers, this is not the case. Making an atomic bomb is much more difficult than a conventional projectile or rocket. For a month it is simply impossible. Then, probably, the Americans made three prototypes at once? Also incredible.

  Making a nuclear bomb is a very expensive procedure. There is no point in doing three if you are not sure that you are doing everything right. Otherwise, it would be possible to create three nuclear projects, build three scientific centers and so on. Even the US is not rich enough to be so extravagant.

  However, well, let's assume that the Americans really built three prototypes at once. Why didn't they immediately start mass production of nuclear bombs after successful tests? After all, immediately after the defeat of Germany, the Americans found themselves in the face of a much more powerful and formidable enemy - the Russians. The Russians, of course, did not threaten the United States with war, but they prevented the Americans from becoming masters of the entire planet. And this, from the point of view of the Yankees, is a completely unacceptable crime.

  Nevertheless, the United States has new atomic bombs ... When do you think? In the autumn of 1945? In the summer of 1946? Not! Only in 1947 did the first nuclear weapons begin to enter the American arsenals! You will not find this date anywhere, but no one will undertake to refute it either. The data that I managed to get is absolutely secret. However, they are fully confirmed by the facts known to us about the subsequent buildup of the nuclear arsenal. And most importantly - the results of tests in the deserts of Texas, which took place at the end of 1946.

  Yes, yes, dear reader, exactly at the end of 1946, and not a month earlier. The data about this was obtained by Russian intelligence and got to me in a very complicated way, which, probably, does not make sense to disclose on these pages, so as not to substitute the people who helped me. On the eve of the new year, 1947, a very curious report lay on the table of the Soviet leader Stalin, which I will quote here verbatim.

  According to Agent Felix, in November-December of this year, a series of nuclear explosions were carried out in the El Paso, Texas area. At the same time, prototypes of nuclear bombs were tested, similar to those dropped on the Japanese islands last year.

  Within a month and a half, at least four bombs were tested, the tests of three ended unsuccessfully. This series of bombs was created in preparation for the large-scale industrial production of nuclear weapons. Most likely, the beginning of such a release should be expected no earlier than mid-1947.

  The Russian agent fully confirmed the data I had. But maybe all this is disinformation on the part of the American intelligence services? Hardly. In those years, the Yankees tried to convince their opponents that they were the strongest in the world, and would not underestimate their military potential. Most likely, we are dealing with a carefully hidden truth.

  What happens? In 1945, the Americans drop three bombs - and all are successful. The next test - the same bombs! - pass a year and a half later, and not too successfully. Serial production begins in another six months, and we do not know - and will never know - to what extent the atomic bombs that appeared in the American army warehouses corresponded to their terrible purpose, that is, how high-quality they were.

  Such a picture can be drawn only in one case, namely: if the first three atomic bombs - the same ones from 1945 - were not built by the Americans on their own, but received from someone. To put it bluntly - from the Germans. Indirectly, this hypothesis is confirmed by the reaction of German scientists to the bombing of Japanese cities, which we know about thanks to the book by David Irving.

  "Poor Professor Gan!"

  In August 1945, ten leading German nuclear physicists, the ten main actors in the Nazi "atomic project", were held captive in the United States. All possible information was pulled out of them (I wonder why, if you believe the American version that the Yankees were far ahead of the Germans in atomic research). Accordingly, scientists were kept in a kind of comfortable prison. There was also a radio in this prison.

  On August 6, at seven o'clock in the evening, Otto Hahn and Karl Wirtz were at the radio. It was then that in the next news release they heard that the first atomic bomb had been dropped on Japan. The first reaction of the colleagues to whom they brought this information was unequivocal: this cannot be true. Heisenberg believed that the Americans could not create their own nuclear weapons (and, as we now know, he was right).

  « Did the Americans mention the word "uranium" in connection with their new bomb? he asked Han. The latter replied in the negative. “Then it has nothing to do with the atom,” Heisenberg snapped. An eminent physicist believed that the Yankees simply used some kind of high-powered explosive.

  However, the nine o'clock newscast dispelled all doubts. Obviously, until then the Germans simply did not assume that the Americans managed to capture several German atomic bombs. However, now the situation has cleared up, and scientists began to torment the pangs of conscience. Yes Yes exactly! Dr. Erich Bagge wrote in his diary: Now this bomb has been used against Japan. They report that even after a few hours the bombed city is hidden by a cloud of smoke and dust. We are talking about the death of 300 thousand people. Poor professor Gan!»

  Moreover, that evening, scientists were very worried about how "poor Gang" would not commit suicide. Two physicists were on duty at his bedside until late to prevent him from killing himself, and went to their rooms only after they found that their colleague had finally fallen into a sound sleep. Gan himself later described his impressions as follows:

  For a while I was occupied with the idea of ​​dumping all the uranium into the sea in order to avoid a similar catastrophe in the future. Although I felt personally responsible for what happened, I wondered if I or anyone else has the right to deprive humanity of all the fruits that a new discovery can bring? And now this terrible bomb has worked!

  Interestingly, if the Americans are telling the truth, and the bomb that fell on Hiroshima was really created by them, why should the Germans feel "personally responsible" for what happened? Of course, each of them contributed to nuclear research, but on the same basis, one could place some of the blame on thousands of scientists, including Newton and Archimedes! After all, their discoveries eventually led to the creation of nuclear weapons!

  The mental anguish of German scientists acquires meaning only in one case. Namely, if they themselves created the bomb that destroyed hundreds of thousands of Japanese. Otherwise, why should they worry about what the Americans have done?

  However, so far all my conclusions have been nothing more than a hypothesis, confirmed only by circumstantial evidence. What if I'm wrong and the Americans really managed the impossible? To answer this question, it was necessary to closely study the German atomic program. And it's not as easy as it seems.

  /Hans-Ulrich von Krantz, "The Secret Weapon of the Third Reich", topwar.ru/

  The world of the atom is so fantastic that its understanding requires a radical break in the usual concepts of space and time. Atoms are so small that if a drop of water could be enlarged to the size of the Earth, each atom in that drop would be smaller than an orange. In fact, one drop of water is made up of 6000 billion billion (6000000000000000000000) hydrogen and oxygen atoms. And yet, despite its microscopic size, the atom has a structure to some extent similar to the structure of our solar system. In its incomprehensibly small center, the radius of which is less than one trillionth of a centimeter, is a relatively huge "sun" - the nucleus of an atom.

  Around this atomic "sun" tiny "planets" - electrons - revolve. The nucleus consists of two main building blocks of the Universe - protons and neutrons (they have a unifying name - nucleons). An electron and a proton are charged particles, and the amount of charge in each of them is exactly the same, but the charges differ in sign: the proton is always positively charged, and the electron is always negative. The neutron does not carry an electric charge and therefore has a very high permeability.

  In the atomic measurement scale, the mass of the proton and neutron is taken as unity. The atomic weight of any chemical element therefore depends on the number of protons and neutrons contained in its nucleus. For example, a hydrogen atom, whose nucleus consists of only one proton, has an atomic mass of 1. A helium atom, with a nucleus of two protons and two neutrons, has an atomic mass of 4.

  The nuclei of atoms of the same element always contain the same number of protons, but the number of neutrons may be different. Atoms that have nuclei with the same number of protons, but differ in the number of neutrons and related to varieties of the same element, are called isotopes. To distinguish them from each other, a number is assigned to the symbol of the element, equal to the sum of all particles in the nucleus of a given isotope.

  The question may arise: why does the nucleus of an atom not fall apart? After all, the protons included in it are electrically charged particles with the same charge, which must repel each other with great force. This is explained by the fact that inside the nucleus there are also so-called intranuclear forces that attract the particles of the nucleus to each other. These forces compensate for the repulsive forces of protons and do not allow the nucleus to fly apart spontaneously.

  The intranuclear forces are very strong, but they act only on very close range. Therefore, nuclei of heavy elements, consisting of hundreds of nucleons, turn out to be unstable. The particles of the nucleus are in constant motion here (within the volume of the nucleus), and if you add some additional amount of energy to them, they can overcome internal forces - the nucleus will be divided into parts. The amount of this excess energy is called the excitation energy. Among the isotopes of heavy elements, there are those that seem to be on the very verge of self-decay. Only a small "push" is enough, for example, a simple hit in the nucleus of a neutron (and it should not even be accelerated to high speed) to initiate a nuclear fission reaction. Some of these "fissile" isotopes were later made artificially. In nature, there is only one such isotope - it is uranium-235.

  Uranus was discovered in 1783 by Klaproth, who isolated it from uranium pitch and named it after the recently discovered planet Uranus. As it turned out later, it was, in fact, not uranium itself, but its oxide. Pure uranium, a silvery-white metal, was obtained
  only in 1842 Peligot. The new element did not have any remarkable properties and did not attract attention until 1896, when Becquerel discovered the phenomenon of radioactivity of uranium salts. After that, uranium became an object scientific research and experiments, but still had no practical application.

  When, in the first third of the 20th century, the structure of the atomic nucleus more or less became clear to physicists, they first of all tried to fulfill the old dream of alchemists - they tried to turn one chemical element into another. In 1934, the French researchers, the spouses Frederic and Irene Joliot-Curie, reported to the French Academy of Sciences about the following experiment: when aluminum plates were bombarded with alpha particles (nuclei of the helium atom), aluminum atoms turned into phosphorus atoms, but not ordinary, but radioactive, which, in turn, passed into a stable isotope of silicon. Thus, an aluminum atom, having added one proton and two neutrons, turned into a heavier silicon atom.

  This experience led to the idea that if the nuclei of the heaviest of the elements existing in nature - uranium, are "shelled" with neutrons, then an element can be obtained that does not exist in natural conditions. In 1938, the German chemists Otto Hahn and Fritz Strassmann repeated in general terms the experience of the Joliot-Curie spouses, taking uranium instead of aluminum. The results of the experiment were not at all what they expected - instead of a new superheavy element with a mass number greater than that of uranium, Hahn and Strassmann received light elements from the middle part of the periodic system: barium, krypton, bromine and some others. The experimenters themselves could not explain the observed phenomenon. It was not until the following year that the physicist Lisa Meitner, to whom Hahn reported her difficulties, found a correct explanation for the observed phenomenon, suggesting that when uranium was bombarded with neutrons, its nucleus split (fissioned). In this case, nuclei of lighter elements should have been formed (this is where barium, krypton and other substances were taken from), as well as 2-3 free neutrons should have been released. Further research allowed to clarify in detail the picture of what is happening.

  Natural uranium consists of a mixture of three isotopes with masses of 238, 234 and 235. The main amount of uranium falls on the 238 isotope, the nucleus of which includes 92 protons and 146 neutrons. Uranium-235 is only 1/140 of natural uranium (0.7% (it has 92 protons and 143 neutrons in its nucleus), and uranium-234 (92 protons, 142 neutrons) is only 1/17500 of total mass uranium (0.006%. The least stable of these isotopes is uranium-235.

  From time to time, the nuclei of its atoms spontaneously divide into parts, as a result of which lighter elements of the periodic system are formed. The process is accompanied by the release of two or three free neutrons, which rush at a tremendous speed - about 10 thousand km / s (they are called fast neutrons). These neutrons can hit other uranium nuclei, causing nuclear reactions. Each isotope behaves differently in this case. Uranium-238 nuclei in most cases simply capture these neutrons without any further transformations. But in about one case out of five, when a fast neutron collides with the nucleus of the 238 isotope, a curious nuclear reaction occurs: one of the uranium-238 neutrons emits an electron, turning into a proton, that is, the uranium isotope turns into more
  the heavy element is neptunium-239 (93 protons + 146 neutrons). But neptunium is unstable - after a few minutes one of its neutrons emits an electron, turning into a proton, after which the neptunium isotope turns into the next element of the periodic system - plutonium-239 (94 protons + 145 neutrons). If a neutron enters the nucleus of unstable uranium-235, then fission immediately occurs - the atoms decay with the emission of two or three neutrons. It is clear that in natural uranium, most of whose atoms belong to the 238 isotope, this reaction has no visible consequences - all free neutrons will eventually be absorbed by this isotope.

  But what if we imagine a fairly massive piece of uranium, consisting entirely of the 235 isotope?

  Here the process will go differently: the neutrons released during the fission of several nuclei, in turn, falling into neighboring nuclei, cause their fission. As a result, a new portion of neutrons is released, which splits the following nuclei. Under favorable conditions, this reaction proceeds like an avalanche and is called a chain reaction. A few bombarding particles may suffice to start it.

  Indeed, let only 100 neutrons bombard uranium-235. They will split 100 uranium nuclei. In this case, 250 new neutrons of the second generation will be released (an average of 2.5 per fission). The neutrons of the second generation will already produce 250 fissions, at which 625 neutrons will be released. In the next generation it will be 1562, then 3906, then 9670, and so on. The number of divisions will increase without limit if the process is not stopped.

  However, in reality, only an insignificant part of neutrons gets into the nuclei of atoms. The rest, swiftly rushing between them, are carried away into the surrounding space. A self-sustaining chain reaction can only occur in a sufficiently large array of uranium-235, which is said to have a critical mass. (This mass at normal conditions is equal to 50 kg.) It is important to note that the fission of each nucleus is accompanied by the release of a huge amount of energy, which turns out to be about 300 million times more than the energy spent on splitting! (It has been calculated that with the complete fission of 1 kg of uranium-235, the same amount of heat is released as when burning 3 thousand tons of coal.)

  This colossal surge of energy, released in a matter of moments, manifests itself as an explosion of monstrous force and underlies the operation of nuclear weapons. But in order for this weapon to become a reality, it is necessary that the charge does not consist of natural uranium, but of a rare isotope - 235 (such uranium is called enriched). Later it was found that pure plutonium is also a fissile material and can be used in an atomic charge instead of uranium-235.

  All these important discoveries were made on the eve of World War II. Soon in Germany and other countries began secret work to build the atomic bomb. In the United States, this problem was taken up in 1941. The whole complex of works was given the name of the "Manhattan Project".

  The administrative leadership of the project was carried out by General Groves, and the scientific direction was carried out by Professor Robert Oppenheimer of the University of California. Both were well aware of the enormous complexity of the task before them. Therefore, Oppenheimer's first concern was the acquisition of a highly intelligent scientific team. There were many physicists in the United States at that time who had emigrated from Nazi Germany. It was not easy to involve them in the creation of weapons directed against their former homeland. Oppenheimer spoke to everyone personally, using the full force of his charm. Soon he managed to gather a small group of theorists, whom he jokingly called "luminaries." And in fact, it included the largest experts of that time in the field of physics and chemistry. (Among them are 13 Nobel Prize winners, including Bohr, Fermi, Frank, Chadwick, Lawrence.) In addition to them, there were many other specialists of various profiles.

  The US government did not skimp on spending, and from the very beginning the work assumed a grandiose scope. In 1942, the world's largest research laboratory was founded at Los Alamos. The population of this scientific city soon reached 9 thousand people. In terms of the composition of scientists, the scope of scientific experiments, the number of specialists and workers involved in the work, the Los Alamos Laboratory had no equal in world history. The Manhattan Project had its own police, counterintelligence, communications system, warehouses, settlements, factories, laboratories, and its own colossal budget.

  The main goal of the project was to obtain enough fissile material from which to create several atomic bombs. In addition to uranium-235, as already mentioned, the artificial element plutonium-239 could serve as a charge for the bomb, that is, the bomb could be either uranium or plutonium.

  Groves and Oppenheimer agreed that work should be carried out simultaneously in two directions, since it is impossible to decide in advance which of them will be more promising. Both methods were fundamentally different from each other: the accumulation of uranium-235 had to be carried out by separating it from the bulk of natural uranium, and plutonium could only be obtained as a result of a controlled nuclear reaction by irradiating uranium-238 with neutrons. Both paths seemed unusually difficult and did not promise easy solutions.

  Indeed, how can two isotopes be separated from each other, which differ only slightly in their weight and chemically behave in exactly the same way? Neither science nor technology has ever faced such a problem. Plutonium production also seemed very problematic at first. Prior to this, the entire experience of nuclear transformations was reduced to several laboratory experiments. Now it was necessary to master the production of kilograms of plutonium on an industrial scale, develop and create a special installation for this - a nuclear reactor, and learn how to control the course of a nuclear reaction.

  And here and there a whole complex of complex problems had to be solved. Therefore, the "Manhattan Project" consisted of several subprojects, headed by prominent scientists. Oppenheimer himself was the head of the Los Alamos Science Laboratory. Lawrence was in charge of the Radiation Laboratory at the University of California. Fermi led research at the University of Chicago on the creation of a nuclear reactor.

  Initially, the most important problem was obtaining uranium. Before the war, this metal actually had no use. Now that it was needed immediately in huge quantities, it turned out that there was no industrial way to produce it.

  The Westinghouse company undertook its development and quickly achieved success. After purification of uranium resin (in this form, uranium occurs in nature) and obtaining uranium oxide, it was converted into tetrafluoride (UF4), from which metallic uranium was isolated by electrolysis. If at the end of 1941, American scientists had only a few grams of metallic uranium at their disposal, then already in November 1942, its industrial production at the Westinghouse plants reached 6,000 pounds per month.

  At the same time, work was underway on the creation of a nuclear reactor. The plutonium production process actually boiled down to the irradiation of uranium rods with neutrons, as a result of which part of the uranium-238 had to turn into plutonium. Sources of neutrons in this case could be fissile uranium-235 atoms scattered in sufficient quantities among uranium-238 atoms. But in order to maintain a constant reproduction of neutrons, a chain reaction of fission of uranium-235 atoms had to begin. Meanwhile, as already mentioned, for every atom of uranium-235 there were 140 atoms of uranium-238. It is clear that the neutrons flying in all directions were much more likely to meet exactly them on their way. That is, a huge number of released neutrons turned out to be absorbed by the main isotope to no avail. Obviously, under such conditions, the chain reaction could not go. How to be?

  At first it seemed that without the separation of two isotopes, the operation of the reactor was generally impossible, but one important circumstance was soon established: it turned out that uranium-235 and uranium-238 were susceptible to neutrons of different energies. It is possible to split the nucleus of an atom of uranium-235 with a neutron of relatively low energy, having a speed of about 22 m/s. Such slow neutrons are not captured by uranium-238 nuclei - for this they must have a speed of the order of hundreds of thousands of meters per second. In other words, uranium-238 is powerless to prevent the start and progress of a chain reaction in uranium-235 caused by neutrons slowed down to extremely low speeds - no more than 22 m/s. This phenomenon was discovered by the Italian physicist Fermi, who lived in the United States since 1938 and supervised the work on the creation of the first reactor here. Fermi decided to use graphite as a neutron moderator. According to his calculations, the neutrons emitted from uranium-235, having passed through a layer of graphite of 40 cm, should have reduced their speed to 22 m/s and started a self-sustaining chain reaction in uranium-235.

  The so-called "heavy" water could serve as another moderator. Since the hydrogen atoms that make up it are very close in size and mass to neutrons, they could best slow them down. (About the same thing happens with fast neutrons as with balls: if a small ball hits a large one, it rolls back, almost without losing speed, but when it meets a small ball, it transfers a significant part of its energy to it - just like a neutron in an elastic collision bounces off a heavy nucleus only slightly slowing down, and on collision with the nuclei of hydrogen atoms very quickly loses all its energy.) However, ordinary water is not suitable for slowing down, since its hydrogen tends to absorb neutrons. That is why deuterium, which is part of "heavy" water, should be used for this purpose.

  In early 1942, under the leadership of Fermi, construction began on the first ever nuclear reactor in the tennis court under the west stands of the Chicago Stadium. All work was carried out by the scientists themselves. The reaction can be controlled the only way- by adjusting the number of neutrons involved in the chain reaction. Fermi envisioned doing this with rods made from materials such as boron and cadmium, which absorb neutrons strongly. Graphite bricks served as a moderator, from which physicists erected columns 3 m high and 1.2 m wide. Rectangular blocks with uranium oxide were installed between them. About 46 tons of uranium oxide and 385 tons of graphite went into the entire structure. To slow down the reaction, cadmium and boron rods introduced into the reactor served.

  If this weren't enough, then for insurance, on a platform located above the reactor, there were two scientists with buckets filled with a solution of cadmium salts - they were supposed to pour them on the reactor if the reaction got out of control. Fortunately, this was not required. On December 2, 1942, Fermi ordered all the control rods to be extended, and the experiment began. Four minutes later, the neutron counters began to click louder and louder. With every minute, the intensity of the neutron flux became greater. This indicated that a chain reaction was taking place in the reactor. It went on for 28 minutes. Then Fermi signaled, and the lowered rods stopped the process. Thus, for the first time, man released the energy of the atomic nucleus and proved that he could control it at will. Now there was no longer any doubt that nuclear weapons were a reality.

  In 1943, the Fermi reactor was dismantled and transported to the Aragonese National Laboratory (50 km from Chicago). Was here shortly
  another nuclear reactor was built, in which heavy water was used as a moderator. It consisted of a cylindrical aluminum tank containing 6.5 tons of heavy water, into which 120 rods of uranium metal were vertically loaded, enclosed in an aluminum shell. The seven control rods were made from cadmium. Around the tank was a graphite reflector, then a screen made of lead and cadmium alloys. The entire structure was enclosed in a concrete shell with a wall thickness of about 2.5 m.

  Experiments at these experimental reactors confirmed the possibility of industrial production of plutonium.

  The main center of the "Manhattan Project" soon became the town of Oak Ridge in the Tennessee River Valley, whose population in a few months grew to 79 thousand people. Here, in short term The first ever enriched uranium plant was built. Immediately in 1943, an industrial reactor was launched that produced plutonium. In February 1944, about 300 kg of uranium was extracted from it daily, from the surface of which plutonium was obtained by chemical separation. (To do this, the plutonium was first dissolved and then precipitated.) The purified uranium was then returned to the reactor again. In the same year, in the barren, desolate desert on the south bank of the Columbia River, construction began on the huge Hanford Plant. There were three powerful nuclear reactor which yielded several hundred grams of plutonium daily.

  In parallel, research was in full swing to develop an industrial process for uranium enrichment.

  After considering different options, Groves and Oppenheimer decided to focus on two methods: gas diffusion and electromagnetic.

  The gas diffusion method was based on a principle known as Graham's law (it was first formulated in 1829 by the Scottish chemist Thomas Graham and developed in 1896 by the English physicist Reilly). In accordance with this law, if two gases, one of which is lighter than the other, are passed through a filter with negligibly small openings, then a little more light gas will pass through it than heavy gas. In November 1942, Urey and Dunning at Columbia University created a gaseous diffusion method for separating uranium isotopes based on the Reilly method.

  Since natural uranium is solid, then it was first converted into uranium fluoride (UF6). This gas was then passed through microscopic - on the order of thousandths of a millimeter - holes in the filter septum.

  Since the difference in the molar weights of the gases was very small, behind the baffle the content of uranium-235 increased only by a factor of 1.0002.

  In order to increase the amount of uranium-235 even more, the resulting mixture is again passed through a partition, and the amount of uranium is again increased by 1.0002 times. Thus, in order to increase the content of uranium-235 to 99%, it was necessary to pass the gas through 4000 filters. This took place in a huge gaseous diffusion plant at Oak Ridge.

  In 1940, under the leadership of Ernst Lawrence in University of California research began on the separation of uranium isotopes by the electromagnetic method. It was necessary to find such physical processes that would allow isotopes to be separated using the difference in their masses. Lawrence made an attempt to separate isotopes using the principle of a mass spectrograph - an instrument that determines the masses of atoms.

  The principle of its operation was as follows: pre-ionized atoms were accelerated by an electric field, and then passed through a magnetic field in which they described circles located in a plane perpendicular to the direction of the field. Since the radii of these trajectories were proportional to the mass, the light ions ended up on circles of a smaller radius than the heavy ones. If traps were placed in the path of the atoms, then it was possible in this way to separately collect different isotopes.

  That was the method. Under laboratory conditions, he gave good results. But the construction of a plant in which isotope separation could be carried out on an industrial scale proved to be extremely difficult. However, Lawrence eventually managed to overcome all difficulties. The result of his efforts was the appearance of the calutron, which was installed in a giant plant in Oak Ridge.

  This electromagnetic plant was built in 1943 and turned out to be perhaps the most expensive brainchild of the Manhattan Project. Lawrence's method required a large number complex, not yet developed devices associated with high voltage, high vacuum and strong magnetic fields. The costs were enormous. Calutron had a giant electromagnet, the length of which reached 75 m and weighed about 4000 tons.

  Several thousand tons of silver wire went into the windings for this electromagnet.

  The entire work (excluding the cost of $300 million worth of silver, which the State Treasury provided only temporarily) cost $400 million. Only for the electricity spent by the calutron, the Ministry of Defense paid 10 million. Much of the equipment at the Oak Ridge factory was superior in scale and precision to anything ever developed in the field.

  But all these expenses were not in vain. Having spent a total of about 2 billion dollars, US scientists by 1944 created a unique technology for uranium enrichment and plutonium production. Meanwhile, at the Los Alamos Laboratory, they were working on the design of the bomb itself. The principle of its operation was in general terms clear for a long time: the fissile substance (plutonium or uranium-235) should have been transferred to a critical state at the time of the explosion (for a chain reaction to occur, the mass of the charge must be even noticeably larger than the critical one) and irradiated with a neutron beam, which entailed is the start of a chain reaction.

  According to calculations, the critical mass of the charge exceeded 50 kilograms, but it could be significantly reduced. In general, the magnitude of the critical mass is strongly influenced by several factors. The more surface area charge - the more neutrons are emitted uselessly into the surrounding space. smallest area the surface has a sphere. Consequently, spherical charges, other things being equal, have the smallest critical mass. In addition, the value of the critical mass depends on the purity and type of fissile materials. It is inversely proportional to the square of the density of this material, which allows, for example, by doubling the density, to reduce the critical mass by a factor of four. The required degree of subcriticality can be obtained, for example, by compacting the fissile material due to the explosion of a conventional explosive charge made in the form of a spherical shell surrounding the nuclear charge. The critical mass can also be reduced by surrounding the charge with a screen that reflects neutrons well. Lead, beryllium, tungsten, natural uranium, iron, and many others can be used as such a screen.

  One of the possible designs of the atomic bomb consists of two pieces of uranium, which, when combined, form a mass greater than the critical one. In order to cause a bomb explosion, you need to bring them together as quickly as possible. The second method is based on the use of an inward-converging explosion. In this case, the flow of gases from a conventional explosive was directed at the fissile material located inside and compressing it until it reached a critical mass. The connection of the charge and its intense irradiation with neutrons, as already mentioned, causes a chain reaction, as a result of which, in the first second, the temperature rises to 1 million degrees. During this time, only about 5% of the critical mass managed to separate. The rest of the charge in early bomb designs evaporated without
  any good.

  The first atomic bomb in history (it was given the name "Trinity") was assembled in the summer of 1945. And on June 16, 1945, the first atomic explosion on Earth was carried out at the nuclear test site in the Alamogordo desert (New Mexico). The bomb was placed in the center of the test site on top of a 30-meter steel tower. Recording equipment was placed around it at a great distance. At 9 km there was an observation post, and at 16 km - a command post. The atomic explosion made a tremendous impression on all the witnesses of this event. According to the description of eyewitnesses, there was a feeling that many suns merged into one and lit up the polygon at once. Then a huge ball of fire appeared above the plain, and a round cloud of dust and light began to slowly and ominously rise towards it.

  After taking off from the ground, this fireball flew up to a height of more than three kilometers in a few seconds. With every moment it grew in size, soon its diameter reached 1.5 km, and it slowly rose into the stratosphere. The fireball then gave way to a column of swirling smoke, which stretched out to a height of 12 km, taking the form of a giant mushroom. All this was accompanied by a terrible roar, from which the earth trembled. The power of the exploded bomb exceeded all expectations.

  As soon as the radiation situation allowed, several Sherman tanks, lined with lead plates from the inside, rushed into the explosion area. On one of them was Fermi, who was eager to see the results of his work. Dead scorched earth appeared before his eyes, on which all life was destroyed within a radius of 1.5 km. The sand sintered into a glassy greenish crust that covered the ground. In a huge crater lay the mutilated remains of a steel support tower. The force of the explosion was estimated at 20,000 tons of TNT.

  The next step was to be combat use bombs against Japan, which, after the surrender of fascist Germany, alone continued the war with the United States and its allies. There were no launch vehicles then, so the bombing had to be carried out from an aircraft. The components of the two bombs were transported with great care by the USS Indianapolis to Tinian Island, where the US Air Force 509th Composite Group was based. By type of charge and design, these bombs were somewhat different from each other.

  The first bomb - "Baby" - was a large-sized aerial bomb with an atomic charge of highly enriched uranium-235. Its length was about 3 m, diameter - 62 cm, weight - 4.1 tons.

  The second bomb - "Fat Man" - with a charge of plutonium-239 had an egg shape with a large-sized stabilizer. Its length
  was 3.2 m, diameter 1.5 m, weight - 4.5 tons.

  On August 6, Colonel Tibbets' B-29 Enola Gay bomber dropped the "Kid" on the large Japanese city of Hiroshima. The bomb was dropped by parachute and exploded, as it was planned, at an altitude of 600 m from the ground.

  The consequences of the explosion were terrible. Even on the pilots themselves, the sight of the peaceful city destroyed by them in an instant made a depressing impression. Later, one of them admitted that they saw at that moment the worst thing that a person can see.

  For those who were on earth, what was happening looked like a real hell. First of all, a heat wave passed over Hiroshima. Its action lasted only a few moments, but it was so powerful that it melted even tiles and quartz crystals in granite slabs, turned telephone poles into coal at a distance of 4 km and, finally, so incinerated human bodies that only shadows remained of them on the asphalt pavement or on the walls of houses. Then a monstrous gust of wind escaped from under the fireball and rushed over the city at a speed of 800 km / h, sweeping away everything in its path. The houses that could not withstand his furious onslaught collapsed as if they had been cut down. In a giant circle with a diameter of 4 km, not a single building remained intact. A few minutes after the explosion, a black radioactive rain passed over the city - this moisture turned into steam condensed in the high layers of the atmosphere and fell to the ground in the form of large drops mixed with radioactive dust.

  After the rain, a new gust of wind hit the city, this time blowing in the direction of the epicenter. He was weaker than the first, but still strong enough to uproot trees. The wind fanned a gigantic fire in which everything that could burn was burning. Of the 76,000 buildings, 55,000 were completely destroyed and burned down. Witnesses of this terrible catastrophe recalled people-torches from which burnt clothes fell to the ground along with tatters of skin, and crowds of distraught people, covered with terrible burns, who rushed screaming through the streets. There was a suffocating stench of burnt human flesh in the air. People lay everywhere, dead and dying. There were many who were blind and deaf and, poking in all directions, could not make out anything in the chaos that reigned around.

  The unfortunate, who were from the epicenter at a distance of up to 800 m, burned out in a split second in the literal sense of the word - their insides evaporated, and their bodies turned into lumps of smoking coals. Located at a distance of 1 km from the epicenter, they were struck by radiation sickness in an extremely severe form. Within a few hours, they began to vomit severely, the temperature jumped to 39-40 degrees, shortness of breath and bleeding appeared. Then, non-healing ulcers appeared on the skin, the composition of the blood changed dramatically, and the hair fell out. After terrible suffering, usually on the second or third day, death occurred.

  In total, about 240 thousand people died from the explosion and radiation sickness. About 160 thousand received radiation sickness in a milder form - their painful death was delayed for several months or years. When the news of the catastrophe spread throughout the country, all of Japan was paralyzed with fear. It increased even more after Major Sweeney's Box Car aircraft dropped a second bomb on Nagasaki on August 9th. Several hundred thousand inhabitants were also killed and wounded here. Unable to resist the new weapons, the Japanese government capitulated - the atomic bomb put an end to World War II.

  War is over. It lasted only six years, but managed to change the world and people almost beyond recognition.

  Human civilization before 1939 and human civilization after 1945 are strikingly different from each other. There are many reasons for this, but one of the most important is the emergence of nuclear weapons. It can be said without exaggeration that the shadow of Hiroshima lies over the entire second half of the 20th century. It became a deep moral burn for many millions of people, both those who were contemporaries of this catastrophe and those born decades after it. Modern man can no longer think about the world the way it was thought before August 6, 1945 - he understands too clearly that this world can turn into nothing in a few moments.

  A modern person cannot look at the war, as his grandfathers and great-grandfathers watched - he knows for sure that this war will be the last, and there will be neither winners nor losers in it. Nuclear weapons have left their mark on all spheres public life, and modern civilization cannot live by the same laws as sixty or eighty years ago. No one understood this better than the creators of the atomic bomb themselves.

  "People of our planet Robert Oppenheimer wrote, should unite. The horror and destruction sown by the last war dictate this thought to us. Explosions of atomic bombs proved it with all cruelty. Other people at other times have said similar words - only about other weapons and other wars. They didn't succeed. But whoever says today that these words are useless is deceived by the vicissitudes of history. We cannot be convinced of this. The results of our labor leave no other choice for humanity but to create a unified world. A world based on law and humanism."