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Who created the atomic bomb in America. Five stages in the creation of the first Soviet atomic bomb. atomic bomb to be

In area nuclear explosion There are two key areas: the center and the epicenter. In the center of the explosion, the process of energy release takes place directly. The epicenter is the projection of this process onto the earth or water surface. The energy of a nuclear explosion, projected onto the earth, can lead to seismic tremors that spread over a considerable distance. Harm environment these shocks bring only within a radius of several hundred meters from the point of explosion.

Affecting factors

Nuclear weapons have the following damage factors:

radioactive infection.
Light emission.
shock wave.
electromagnetic impulse.
penetrating radiation.

The consequences of an atomic bomb explosion are detrimental to all living things. Due to the release of a huge amount of light and heat energy, the explosion of a nuclear projectile is accompanied by a bright flash. In terms of power, this flash is several times stronger than the sun's rays, so there is a danger of being hit by light and thermal radiation within a radius of several kilometers from the point of explosion.

Another most dangerous damaging factor of atomic weapons is the radiation generated during the explosion. It acts only a minute after the explosion, but has a maximum penetrating power.

The shock wave has the strongest destructive effect. She literally erases everything that stands in her way from the face of the earth. Penetrating radiation poses a danger to all living beings. In humans, it causes the development of radiation sickness. Well, the electromagnetic pulse harms only technology. Taken together, the damaging factors of an atomic explosion carry a huge danger.

First tests

Throughout the history of the atomic bomb, America has shown the greatest interest in its creation. At the end of 1941, the country's leadership allocated a huge amount of money and resources for this direction. The project manager was Robert Oppenheimer, who is considered by many to be the creator of the atomic bomb. In fact, he was the first who was able to bring the idea of scientists to life. As a result, on July 16, 1945, the first test of an atomic bomb took place in the desert of New Mexico. Then America decided that in order to completely end the war, it needed to defeat Japan, an ally of Nazi Germany. The Pentagon quickly chose the targets for the first nuclear attacks, which were supposed to be a vivid illustration of the power of American weapons.

On August 6, 1945, the US atomic bomb, cynically called "Baby", was dropped on the city of Hiroshima. The shot turned out to be just perfect - the bomb exploded at a height of 200 meters from the ground, due to which its blast wave caused terrifying damage to the city. In areas far from the center, charcoal stoves were overturned, causing severe fires.

The bright flash was followed by a heat wave, which, in 4 seconds of action, managed to melt the tiles on the roofs of houses and incinerate telegraph poles. The heat wave was followed by a shock wave. The wind, which swept through the city at a speed of about 800 km / h, demolished everything in its path. Of the 76,000 buildings located in the city before the explosion, about 70,000 were completely destroyed. A few minutes after the explosion, it began to rain from the sky, large drops of which were black. The rain fell due to the formation in the cold layers of the atmosphere of a huge amount of condensate, consisting of steam and ash.

People who were hit by the fireball within a radius of 800 meters from the point of explosion turned into dust. Those who were a little further from the explosion had burned skin, the remnants of which were torn off by the shock wave. Black radioactive rain left incurable burns on the skin of the survivors. Those who miraculously managed to escape soon began to show signs of radiation sickness: nausea, fever and bouts of weakness.

Three days after the bombing of Hiroshima, America attacked another Japanese city - Nagasaki. The second explosion had the same disastrous consequences as the first.

In a matter of seconds, two atomic bombs killed hundreds of thousands of people. The shock wave practically wiped Hiroshima off the face of the earth. More than half of the local residents (about 240 thousand people) died immediately from their injuries. In the city of Nagasaki, about 73 thousand people died from the explosion. Many of those who survived were exposed to severe radiation, which caused infertility, radiation sickness and cancer. As a result, some of the survivors died in terrible agony. The use of the atomic bomb in Hiroshima and Nagasaki illustrated the terrible power of these weapons.

You and I already know who invented the atomic bomb, how it works and what consequences it can lead to. Now we will find out how things were with nuclear weapons in the USSR.

After the bombing of Japanese cities, I.V. Stalin realized that the creation of the Soviet atomic bomb was a matter of national security. On August 20, 1945, a committee on nuclear energy was created in the USSR, headed by L. Beria.

It is worth noting that work in this direction has been carried out in the Soviet Union since 1918, and in 1938, a special commission on the atomic nucleus was created at the Academy of Sciences. With the outbreak of World War II, all work in this direction was frozen.

In 1943, Soviet intelligence officers handed over from England materials of closed scientific papers in the field of nuclear energy. These materials illustrated that the work of foreign scientists on the creation of an atomic bomb has seriously advanced. At the same time, the American residents facilitated the introduction of reliable Soviet agents into the main centers of US nuclear research. Agents transmitted information about new developments to Soviet scientists and engineers.

Technical task

When in 1945 the issue of creating a Soviet nuclear bomb became almost a priority, one of the project leaders, Yu. Khariton, drew up a plan to develop two versions of the projectile. On June 1, 1946, the plan was signed by the top leadership.

According to the task, the designers had to build a RDS (Special Jet Engine) of two models:

RDS-1. A bomb with a plutonium charge that is detonated by spherical compression. The device was borrowed from the Americans.
RDS-2. A cannon bomb with two uranium charges converging in the cannon barrel before reaching a critical mass.

In the history of the notorious RDS, the most common, albeit humorous, formulation was the phrase "Russia does it itself." It was invented by Yu. Khariton's deputy, K. Shchelkin. This phrase very accurately conveys the essence of the work, at least for the RDS-2.

When America found out that the Soviet Union possessed the secrets of creating nuclear weapons, it became eager to escalate preventive war as soon as possible. In the summer of 1949, the Trojan plan appeared, according to which on January 1, 1950 it was planned to start fighting against the USSR. Then the date of the attack was moved to the beginning of 1957, but on the condition that all NATO countries join it.

Tests

When information about America's plans came to the USSR through intelligence channels, the work of Soviet scientists accelerated significantly. Western experts believed that in the USSR atomic weapons would be created no earlier than in 1954-1955. In fact, the tests of the first atomic bomb in the USSR took place already in August 1949. On August 29, the RDS-1 device was blown up at the training ground in Semipalatinsk. A large team of scientists took part in its creation, led by Kurchatov Igor Vasilyevich. The design of the charge belonged to the Americans, and the electronic equipment was created from scratch. The first atomic bomb in the USSR exploded with a power of 22 kt.

Due to the likelihood of a retaliatory strike, the Troyan plan, which involved a nuclear attack on 70 Soviet cities, was thwarted. Tests at Semipalatinsk marked the end of the American monopoly on the possession of atomic weapons. The invention of Igor Vasilyevich Kurchatov completely destroyed the military plans of America and NATO and prevented the development of another world war. Thus began the era of peace on Earth, which exists under the threat of absolute annihilation.

"Nuclear club" of the world

To date, not only America and Russia have nuclear weapons, but also a number of other states. The set of countries that own such weapons is conditionally called the "nuclear club".

It includes:

America (since 1945).
USSR, and now Russia (since 1949).
England (since 1952).
France (since 1960).
China (since 1964).
India (since 1974).
Pakistan (since 1998).
Korea (since 2006).

Israel also has nuclear weapons, although the country's leadership refuses to comment on their existence. In addition, on the territory of NATO countries (Italy, Germany, Turkey, Belgium, the Netherlands, Canada) and allies (Japan, South Korea, despite the official refusal), there are American nuclear weapons.

Ukraine, Belarus and Kazakhstan, which owned some of the nuclear weapons of the USSR, transferred their bombs to Russia after the collapse of the Union. She became the sole heir to the nuclear arsenal of the USSR.

Conclusion

Today we learned who invented the atomic bomb and what it is. Summarizing the above, we can conclude that today nuclear weapons are the most powerful tool of global politics, firmly embedded in relations between countries. On the one hand, it is an effective deterrent, and on the other hand, it is a convincing argument for preventing military confrontation and strengthening peaceful relations between states. Nuclear weapons are a symbol of an entire era, which requires especially careful handling.

The history of human development has always been accompanied by war as a way to resolve conflicts by violence. Civilization has suffered more than fifteen thousand small and large armed conflicts, the loss of human lives is in the millions. Only in the nineties of the last century there were more than a hundred military clashes, with the participation of ninety countries of the world.

At the same time, scientific discoveries and technological progress made it possible to create weapons of destruction of ever greater power and sophistication of use. In the twentieth century nuclear weapons have become the peak of massive destructive impact and an instrument of politics.

Atomic bomb device

Modern nuclear bombs as a means of defeating the enemy are created on the basis of advanced technical solutions, the essence of which is not widely publicized. But the main elements inherent in this type of weapon can be considered on the example of the device of a nuclear bomb with the code name "Fat Man", dropped in 1945 on one of the cities of Japan.

The power of the explosion was 22.0 kt in TNT equivalent.

It had the following design features:

the length of the product was 3250.0 mm, while the diameter of the bulk part was 1520.0 mm. Total weight over 4.5 tons;
the body is represented by an elliptical shape. To avoid premature destruction due to anti-aircraft ammunition and undesirable effects of a different kind, 9.5 mm armored steel was used for its manufacture;
the body is divided into four internal parts: the nose, two halves of the ellipsoid (the main one is the compartment for the nuclear filling), the tail.
the nose compartment is equipped with rechargeable batteries;
the main compartment, like a bow, to prevent the ingress of harmful media, moisture, creating comfortable conditions for the operation of the boron sensor, they are evacuated;
the ellipsoid housed a plutonium core, covered by a uranium tamper (shell). He played the role of an inertial flow limiter nuclear reaction, providing the maximum activity of weapons-grade plutonium, by reflecting neutrons to the side of the active zone of the charge.

Inside the nucleus was placed the primary source of neutrons, called the initiator or "hedgehog". Represented by beryllium spherical shape with a diameter 20.0 mm with an outer coating based on polonium - 210.

It should be noted that the expert community has determined such a design of a nuclear weapon to be ineffective and unreliable in use. Neutron initiation of the unguided type was not used further. .

Operating principle

The process of fission of the nuclei of uranium 235 (233) and plutonium 239 (this is what the nuclear bomb consists of) with a huge release of energy while limiting the volume is called a nuclear explosion. The atomic structure of radioactive metals has an unstable shape - they are constantly divided into other elements.

The process is accompanied by the detachment of neurons, some of which, falling on neighboring atoms, initiate a further reaction, accompanied by the release of energy.

The principle is as follows: reducing the decay time leads to a greater intensity of the process, and the concentration of neurons on the bombardment of nuclei leads to a chain reaction. When two elements are combined to a critical mass, a supercritical one will be created, leading to an explosion.

Under domestic conditions, it is impossible to provoke an active reaction - high speeds of approach of elements are needed - at least 2.5 km / s. Achieving this speed in a bomb is possible by using combining types of explosives (fast and slow), balancing the density of the supercritical mass, producing an atomic explosion.

Nuclear explosions are attributed to the results of human activity on the planet or its orbit. Natural processes of this kind are possible only on some stars in outer space.

Atomic bombs are rightfully considered the most powerful and destructive weapons of mass destruction. Tactical use solves the tasks of destroying strategic, military facilities, ground-based, as well as deep-based, defeating a significant accumulation of equipment, enemy manpower.

It can be applied globally only in pursuit of the goal of complete destruction of the population and infrastructure in large areas.

To achieve certain goals, fulfill tasks of a tactical and strategic nature, detonations of nuclear weapons can be carried out:

at critical and low altitudes (above and below 30.0 km);
in direct contact with the earth's crust (water);
underground (or underwater explosion).

A nuclear explosion is characterized by the instantaneous release of enormous energy.

Leading to the defeat of objects and a person as follows:

shock wave. An explosion above or on the earth's crust (water) is called an air wave, underground (water) - a seismic explosive wave. An air wave is formed after a critical compression of air masses and propagates in a circle until attenuation at a speed exceeding sound. It leads to both direct defeat of manpower, and indirect (interaction with fragments of destroyed objects). The action of excess pressure makes the technique non-functional by moving and hitting the ground;
Light emission. Source - the light part formed by the evaporation of a product with air masses, in case of ground application - soil vapors. Exposure occurs in ultraviolet and infrared spectra. Its absorption by objects and people provokes charring, melting and burning. The degree of damage depends on the removal of the epicenter;
penetrating radiation- this is neutrons and gamma rays moving from the place of the rupture. Impact on biological tissues leads to ionization of cell molecules, leading to radiation sickness of the body. Damage to property is associated with molecular fission reactions in the damaging elements of ammunition.
radioactive infection. In a ground explosion, soil vapors, dust, and other things rise. A cloud appears, moving in the direction of the movement of air masses. Sources of damage are fission products of the active part of a nuclear weapon, isotopes, not destroyed parts of the charge. When a radioactive cloud moves, a continuous radiation contamination of the area occurs;
electromagnetic impulse. The explosion accompanies the appearance of electromagnetic fields (from 1.0 to 1000 m) in the form of an impulse. They lead to the failure of electrical appliances, controls and communications.

The combination of factors of a nuclear explosion inflicts damage to the enemy’s manpower, equipment and infrastructure at different levels, and the fatality of the consequences is associated only with the distance from its epicenter.

History of the creation of nuclear weapons

The creation of weapons using a nuclear reaction was accompanied by a number of scientific discoveries, theoretical and practical research, including:

1905- the theory of relativity was created, stating that a small amount of matter corresponds to a significant release of energy according to the formula E \u003d mc2, where "c" represents the speed of light (author A. Einstein);
1938- German scientists conducted an experiment on the division of an atom into parts by attacking uranium with neutrons, which ended successfully (O. Hann and F. Strassmann), and a physicist from the UK gave an explanation for the fact of energy release (R. Frisch);
1939- scientists from France that when carrying out a chain of reactions of uranium molecules, energy will be released capable of producing an explosion of enormous force (Joliot-Curie).

The latter became the starting point for the invention of atomic weapons. Germany, Great Britain, the USA, Japan were engaged in parallel development. The main problem was the extraction of uranium in the required volumes for experiments in this area.

The problem was solved faster in the United States by purchasing raw materials from Belgium in 1940.

Within the framework of the project, called Manhattan, from 1939 to 1945, a uranium purification plant was built, a center for the study of nuclear processes was created, and the best specialists were attracted to work in it - physicists from all over Western Europe.

Great Britain, which led its own developments, was forced, after the German bombing, to voluntarily transfer the developments on its project to the US military.

The Americans are believed to be the first to invent the atomic bomb. Tests of the first nuclear charge were carried out in the state of New Mexico in July 1945. The flash from the explosion darkened the sky, and the sandy landscape turned to glass. After a short period of time, nuclear charges were created, called "Baby" and "Fat Man".

Nuclear weapons in the USSR - dates and events

The formation of the USSR as a nuclear power was preceded by a long work of individual scientists and state institutions. Key periods and significant dates of events are presented as follows:

1920 consider the beginning of the work of Soviet scientists on the fission of the atom;
From the thirties the direction of nuclear physics becomes a priority;
October 1940- an initiative group of physicists came up with a proposal to use nuclear developments for military purposes;
Summer 1941 in connection with the war, the institutes of atomic energy were transferred to the rear;
Autumn 1941 years, Soviet intelligence informed the country's leadership about the start of nuclear programs in Britain and America;
September 1942- studies of the atom began to be done in full, work on uranium continued;
February 1943- a special research laboratory was created under the leadership of I. Kurchatov, and the general leadership was entrusted to V. Molotov;

The project was led by V. Molotov.

August 1945- in connection with the conduct of nuclear bombing in Japan, the high importance of developments for the USSR, a Special Committee was created under the leadership of L. Beria;
April 1946- KB-11 was created, which began to develop samples of Soviet nuclear weapons in two versions (using plutonium and uranium);
mid 1948- work on uranium was stopped due to low efficiency at high costs;
August 1949- when the atomic bomb was invented in the USSR, the first Soviet nuclear bomb was tested.

The quality work of the intelligence agencies, which managed to obtain information on American nuclear developments, contributed to the reduction in the development time of the product. Among those who first created the atomic bomb in the USSR was a team of scientists led by Academician A. Sakharov. They developed more advanced technical solutions than those used by the Americans.

Atomic bomb "RDS-1"

In 2015-2017, Russia made a breakthrough in improving nuclear weapons and their means of delivery, thereby declaring a state capable of repelling any aggression.

First atomic bomb tests

After testing an experimental nuclear bomb in the state of New Mexico in the summer of 1945, the bombing of the Japanese cities of Hiroshima and Nagasaki followed on August 6 and 9, respectively.

this year completed the development of the atomic bomb

In 1949, under conditions of increased secrecy, the Soviet designers of KB - 11 and scientists completed the development of an atomic bomb, which was called RDS-1 (jet engine "C"). On August 29, the first Soviet nuclear device was tested at the Semipalatinsk test site. The atomic bomb of Russia - RDS-1 was a product of a "drop-shaped" shape, weighing 4.6 tons, with a volume part diameter of 1.5 m, and a length of 3.7 meters.

The active part included a plutonium block, which made it possible to achieve an explosion power of 20.0 kilotons, commensurate with TNT. The test site covered a radius of twenty kilometers. Features of the test detonation conditions have not been made public to date.

On September 3 of the same year, American aviation intelligence established the presence of traces of isotopes in the air masses of Kamchatka, indicating the testing of a nuclear charge. On the twenty-third, the first person in the United States publicly announced that the USSR had succeeded in testing the atomic bomb.

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 equal to the sum of all particles in the nucleus of a given isotope is assigned to the element symbol.

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 strength. 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 at 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 does not even have to be accelerated to a high speed) for the nuclear fission reaction to start. 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 the object of scientific research and experimentation, but practical application still didn't have.

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 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 the total mass of 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 under normal conditions is 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 fission! (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 secret work began in Germany and other countries on the creation of an 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. In the United States at that time there were many physicists who had emigrated from fascist 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 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 loses all its energy very quickly.) 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 in 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 over 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). Another nuclear reactor was soon built here, 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 a short time, the first plant for the production of enriched uranium 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. Three powerful nuclear reactors were located here, giving 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 a solid, it was first converted to 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 at the 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 of 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 larger the surface area of the charge, the more neutrons are emitted uselessly into the surrounding space. A sphere has the smallest surface area. 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 the combat use of the atomic bomb 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 atomic 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 atomic 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 pavement asphalt. 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 fell 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."

The first atomic bomb in the USSR was a landmark event that completely changed the geopolitical situation on the planet.

All the key players on the world stage in the 40s of the 20th century tried to get their hands on a nuclear bomb in order to establish absolute power, make their influence on other countries decisive and, if necessary, easily destroy enemy cities and hit millions of people with the deadly impact of high-energy radiation.

The atomic project in the country of the Soviets got its start in 1943, which became a necessity to quickly catch up with the leading countries, Germany and the USA, in this matter, and prevent them from gaining decisive superiority. The exact launch date is February 11, 1943.

At that time, scientists and developers could not yet fully realize what a terrible weapon they offer to politicians, who are often very odious personalities. Nuclear weapons can instantly destroy millions of people around the world and cause irreparable harm to nature in all its manifestations.

Today, the political situation is still tense, which is a common thing for eternally warring people, and nuclear weapons continue to play an important role in establishing parity - equality of forces, thanks to which none of the parties to the new global conflict dares to attack the enemy.

Creation of the atomic bomb in the USSR

Molotov became the main politician who was supposed to oversee the nuclear program.

Vyacheslav Mikhailovich Molotov (1890 - 1986) - Russian revolutionary, Soviet politician and statesman. Chairman of the Council of People's Commissars of the USSR in 1930-1941, People's Commissar, Minister of Foreign Affairs of the USSR in 1939-1949, 1953-1956.

He, in turn, decided that such a serious work of scientists should be headed by Kurchatov, an experienced physicist, under whose leadership the domestic science made many outstanding breakthroughs.

This inventor and leader became famous for many things, in particular, for the fact that the first nuclear power plant was launched under him, that is, the peaceful use of atomic energy became possible.

The first bomb was named RDS-1. This abbreviation meant the following phrase - "jet engine special". This cipher was developed in order to keep developments as secret as possible.

Explosions of the projectile were carried out on the territory of Kazakhstan at a specially constructed for this training ground.

There are many rumors that the Russian side could not catch up with the Americans in any way, because they did not know some of the nuances of the development. The invention was allegedly hastened by the fact that American anonymous scientists "leaked" secrets to the councils, which greatly accelerated the matter.

But critics say that even if this is so, it is worth understanding that the domestic bomb would not have taken place without the general high level of development of science and industry, as well as the presence of highly qualified personnel who could quickly understand and apply the clues, even if they were.

Julius Rosenberg and his wife Ethel are American communists accused of spying for the Soviet Union (primarily in transferring American nuclear secrets to the USSR) and executed for this in 1953.

As for the one who passed on the secret to speed things up, then the blueprints for the bomb were sent to the USSR by a scientist named Julius Rosenberg, although he was supervised by other personalities, for example, Klaus Fuchs.

For his act, Rosenberg was executed in the early 50s in the United States. There are other names in the case as well.

The "father" of the Soviet nuclear project is rightfully considered the outstanding Russian nuclear physicist Igor Vasilyevich Kurchatov. The creator of the deadly weapon took up this project in 1942 and oversaw it until his death.

Igor Vasilyevich Kurchatov (1903 - 1960) - Soviet physicist, "father" of the Soviet atomic bomb. Three times Hero of Socialist Labor (1949, 1951, 1954). Academician of the USSR Academy of Sciences (1943) and Uzbek Academy of Sciences. SSR (1959), doctor of physical and mathematical sciences (1933), professor (1935). Founder and first director of the Institute of Atomic Energy (1943-1960).

The development of weapons did not prevent the scientist from acting in other areas, for example, it was he who made a decisive contribution to the launch of the first nuclear reactors in the country and around the world for energy production.

Kurchatov was born in 1903 in the family of a landowner, he studied exceptionally well, and at the age of 21 he completed his first scientific work. It was he who became one of the leaders in the study of nuclear physics and all its many secrets.

Kurchatov is the owner of many honorary awards and titles of the highest level. The entire Soviet Union knew and admired this man, who died at only 57 years old.

The work went on at an accelerated pace, therefore, after the launch of the project in 42, already On August 29, 1949, the first successful test was made.

The bomb was tested by a scientist and a military team under the organization of Khariton. Responsibility for any mistakes was the toughest, so all participants in the work treated their work with the utmost care.

The nuclear test site where this historic event took place is called the Semipalatinsk test site, and it is located on the territory of present-day Kazakhstan, and at that time - the Kazakh SSR. In the future, other places for such tests appeared.

The power of the RDS-1 was 22 kilotons, with its explosion, a huge amount of destruction took place. Their chronology is still of great interest today.

Here are some nuances of preparing the explosion:

To test the strength of the impact on the landfill, civilian houses were built from wood and concrete panels. About 1,500 animals were also housed there, on which it was planned to test the effects of the bomb.
The experiment also used sectors with various types weapons, fortified objects and protected structures.
The bomb itself was mounted on a metal tower almost 40 meters high.

When the explosion was made, the metal tower where the bomb was standing simply disappeared, and in its place a hole was formed in the ground by 1.5 meters. Of the 1500 animals, about 400 died.

Many concrete structures, houses, bridges, civilian and military vehicles were hopelessly damaged. Supervision of the work was carried out at the highest level, therefore there were no unplanned problems.

The consequences of the creation of the atomic bomb for the USSR

When the coveted form of weapons nevertheless appeared in the hands of the Soviet leaders, it caused a lot of different reactions. Already after the first successful test of the RDS-1, the Americans learned about this with the help of their reconnaissance aircraft.

US President Truman issued a statement about the event about a month after the tests.

Officially, the USSR recognized the presence of the bomb only in 1950.

What are the consequences of all this? History relates to the events of those times ambiguously. Of course, the creation of nuclear weapons had its own important reasons, which were, perhaps, even a matter of the country's survival. The developer of such a project also did not understand the fullness of the consequences, and this applies not only to the USSR, but also to the Germans and Americans.

In general, in short, the consequences are as follows:

the establishment of nuclear parity, when none of the parties to the global confrontation would risk starting an open war;
significant technological breakthrough of the Soviet Union;
the formation of our country as a world leader, the opportunity to speak from a position of strength.

Also, the bomb brought an increase in tension in relations between the USSR and the USA, today this is no less evident. The consequences of the production of nuclear weapons was that the world at any moment could slide into a catastrophe and suddenly find itself in a state of nuclear winter, because you never know what will come to the mind of the next politician who has seized power.

In general, the supervision and creation of the RDS-1 nuclear bomb was a complex event that opened a literally new era in world history, and the year the USSR created this weapon became a landmark.

The question of the creators of the first Soviet nuclear bomb is quite controversial and requires a more detailed study, but who really father of the Soviet atomic bomb, there are several entrenched opinions. Most physicists and historians believe that the main contribution to the creation of Soviet nuclear weapons was made by Igor Vasilyevich Kurchatov. However, some express the opinion that without Yuli Borisovich Khariton, the founder of Arzamas-16 and the creator of the industrial basis for obtaining enriched fissile isotopes, the first test of this type of weapon in the Soviet Union would have dragged on for several more years.

Let us consider the historical sequence of research and development work to create a practical sample of an atomic bomb, leaving aside the theoretical studies of fissile materials and the conditions for the occurrence of a chain reaction, without which a nuclear explosion is impossible.

For the first time, a series of applications for obtaining copyright certificates for the invention (patents) of the atomic bomb was filed in 1940 by employees of the Kharkov Institute of Physics and Technology F. Lange, V. Spinel and V. Maslov. The authors considered issues and proposed solutions for the enrichment of uranium and its use as an explosive. The proposed bomb had a classic detonation scheme (gun type), which was later, with some modifications, used to initiate a nuclear explosion in American uranium-based nuclear bombs.

Great Patriotic War slowed down theoretical and experimental research in the field of nuclear physics, and the largest centers (Kharkov Institute of Physics and Technology and the Radium Institute - Leningrad) ceased their activities and were partially evacuated.

Starting in September 1941, the intelligence agencies of the NKVD and the Main Intelligence Directorate of the Red Army began to receive an increasing amount of information about the special interest shown in British military circles in creating explosives based on fissile isotopes. In May 1942, the Main Intelligence Directorate, summarizing the materials received, reported to the State Defense Committee (GKO) on the military purpose of ongoing nuclear research.

Around the same time, Lieutenant Technician Georgy Nikolayevich Flerov, who in 1940 was one of the discoverers of spontaneous fission of uranium nuclei, wrote a letter personally to I.V. Stalin. In his message, the future academician, one of the creators of Soviet nuclear weapons, draws attention to the fact that publications on works related to the fission of the atomic nucleus have disappeared from the scientific press in Germany, Great Britain and the United States. According to the scientist, this may indicate the reorientation of "pure" science in the practical military field.

In October-November 1942, the foreign intelligence service of the NKVD reported to L.P. Beria, all available information about work in the field of nuclear research, obtained by illegal intelligence officers in England and the USA, on the basis of which the People's Commissar writes a memorandum to the head of state.

At the end of September 1942, I.V. Stalin signs a decree of the State Defense Committee on the resumption and intensification of "works on uranium", and in February 1943, after studying the materials submitted by L.P. Beria, a decision is made to transfer all research on the creation of nuclear weapons (atomic bombs) into a "practical channel". General management and coordination of all types of work were entrusted to the Deputy Chairman of the GKO V.M. Molotov, the scientific management of the project was entrusted to I.V. Kurchatov. The management of work on the search for deposits and the extraction of uranium ore was entrusted to A.P. Zavenyagin, M.G. was responsible for the creation of enterprises for the enrichment of uranium and the production of heavy water. Pervukhin, and the People's Commissar of Nonferrous Metallurgy P.F. Lomako "trusted" by 1944 to accumulate 0.5 tons of metallic (enriched to the required standards) uranium.

At this, the first stage (the deadlines for which were disrupted), providing for the creation of an atomic bomb in the USSR, was completed.

After the United States dropped atomic bombs on Japanese cities, the leadership of the USSR saw firsthand the backlog of scientific research and practical work to create nuclear weapons from their competitors. To intensify and create an atomic bomb as soon as possible, on August 20, 1945, a special decree of the GKO was issued on the creation of Special Committee No. 1, whose functions included organizing and coordinating all types of work to create a nuclear bomb. L.P. is appointed the head of this emergency body with unlimited powers. Beria, the scientific leadership is entrusted to I.V. Kurchatov. The direct management of all research, design and production enterprises was to be carried out by the People's Commissar for Armaments B.L. Vannikov.

Due to the fact that scientific, theoretical and experimental studies were completed, intelligence data on the organization of industrial production of uranium and plutonium were obtained, the scouts obtained schemes for American atomic bombs, the greatest difficulty was the transfer of all types of work to an industrial basis. To create enterprises for the production of plutonium, the city of Chelyabinsk - 40 was built from scratch (scientific supervisor I.V. Kurchatov). In the village of Sarov (future Arzamas - 16), a plant was built for the assembly and production on an industrial scale of the atomic bombs themselves (supervisor - chief designer Yu.B. Khariton).

Thanks to the optimization of all types of work and strict control over them by L.P. Beria, who, however, did not interfere with the creative development of the ideas embedded in the projects, in July 1946, technical specifications for the creation of the first two Soviet atomic bombs were developed:

"RDS - 1" - a bomb with a plutonium charge, the explosion of which was carried out according to the implosive type;
"RDS - 2" - a bomb with a cannon detonation of a uranium charge.

I.V. Kurchatov.

Paternity rights

Tests of the first atomic bomb "RDS - 1" created in the USSR (the abbreviation in various sources stands for - "jet engine C" or "Russia makes itself") took place in the last days of August 1949 in Semipalatinsk under the direct supervision of Yu.B. Khariton. The power of the nuclear charge was 22 kilotons. However, from the point of view of modern copyright law, it is impossible to attribute paternity to this product to any of the Russian (Soviet) citizens. Earlier, when developing the first practical model suitable for military use, the Government of the USSR and the leadership of Special Project No. 1 decided to copy the domestic implosion bomb with a plutonium charge from the American Fat Man prototype dropped on the Japanese city of Nagasaki as much as possible. Thus, the “fatherhood” of the first nuclear bomb of the USSR rather belongs to General Leslie Groves, the military leader of the Manhattan project, and Robert Oppenheimer, known throughout the world as the “father of the atomic bomb” and who provided scientific leadership on the project. "Manhattan". The main difference between the Soviet model and the American one is the use of domestic electronics in the detonation system and a change in the aerodynamic shape of the bomb body.

The first "purely" Soviet atomic bomb can be considered the product "RDS - 2". Despite the fact that it was originally planned to copy the American uranium prototype "Kid", the Soviet uranium atomic bomb "RDS - 2" was created in an implosive version, which had no analogues at that time. L.P. participated in its creation. Beria - general project management, I.V. Kurchatov is the scientific supervisor of all types of work and Yu.B. Khariton is the scientific adviser and chief designer responsible for the manufacture of a practical sample of the bomb and its testing.

Speaking about who is the father of the first Soviet atomic bomb, one should not lose sight of the fact that both RDS - 1 and RDS - 2 were blown up at the test site. The first atomic bomb dropped from the Tu - 4 bomber was the RDS - 3 product. Its design repeated the RDS-2 implosion bomb, but had a combined uranium-plutonium charge, thanks to which it was possible to increase its power, with the same dimensions, up to 40 kilotons. Therefore, in many publications, academician Igor Kurchatov is considered the “scientific” father of the first atomic bomb actually dropped from an aircraft, since his colleague in the scientific workshop, Yuli Khariton, was categorically against making any changes. The fact that in the entire history of the USSR L.P. Beria and I.V. Kurchatov were the only ones who in 1949 were awarded the title of Honorary Citizen of the USSR - "... for the implementation of the Soviet atomic project, the creation of an atomic bomb."