1.6.7. How Ts'ai Lun Invented Paper The Chinese considered all other countries barbaric for thousands of years. China is the birthplace of many great inventions. It was here that paper was invented. Before its appearance, rolled paper was used for records in China

Ancient Indian and Greek scientists assumed that matter consists of the smallest indivisible particles; they wrote about this in their treatises long before the beginning of our era. In the 5th century BC e. the Greek scientist Leucippus from Miletus and his student Democritus formulated the concept of an atom (Greek atomos "indivisible"). For many centuries this theory remained rather philosophical, and only in 1803 was it proposed by the English chemist John Dalton scientific theory atom, confirmed by experiments.

IN late XIX early 20th century this theory was developed in the writings of Joseph Thomson, and then Ernest Rutherford, called the father of nuclear physics. It was found that the atom, contrary to its name, is not an indivisible finite particle, as previously stated. In 1911, physicists adopted Rutherford Bohr's "planetary" system, according to which an atom consists of a positively charged nucleus and negatively charged electrons revolving around it. Later it was found that the nucleus is also not indivisible; it consists of positively charged protons and chargeless neutrons, which, in turn, consist of elementary particles.

As soon as the structure of the atomic nucleus became more or less clear to scientists, they tried to realize the old dream of alchemists - the transformation of one substance into another. In 1934, French scientists Frederic and Irene Joliot-Curie, when bombarding aluminum with alpha particles (helium atom nuclei), obtained radioactive phosphorus atoms, which, in turn, turned into a stable silicon isotope of a heavier element than aluminum. The idea arose to conduct a similar experiment with the heaviest natural element, uranium, discovered in 1789 by Martin Klaproth. After Henri Becquerel discovered the radioactivity of uranium salts in 1896, scientists were seriously interested in this element.

E. Rutherford.

Mushroom nuclear explosion.

In 1938, the German chemists Otto Hahn and Fritz Strassmann conducted an experiment similar to the Joliot-Curie experiment, however, taking uranium instead of aluminum, they hoped to obtain a new superheavy element. However, the result was unexpected: instead of superheavy, light elements from the middle part of the periodic table were obtained. Some time later, the physicist Lisa Meitner suggested that the bombardment of uranium with neutrons leads to the splitting (fission) of its nucleus, resulting in the nuclei of light elements and a certain number of free neutrons.

Further studies have shown that natural uranium consists of a mixture of three isotopes, with uranium-235 being the least stable of them. From time to time, the nuclei of its atoms spontaneously divide into parts, this process is accompanied by the release of two or three free neutrons, which rush at a speed of about 10 thousand kms. The nuclei of the most common isotope-238 in most cases simply capture these neutrons, less often uranium is converted into neptunium and then into plutonium-239. When a neutron hits the nucleus of uranium-2 3 5, its new fission immediately occurs.

It was obvious: if you take enough big piece pure (enriched) uranium-235, the nuclear fission reaction in it will go like an avalanche, this reaction was called a chain reaction. Each nuclear fission releases a huge amount of energy. It was 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 release of energy, released in a matter of moments, was to manifest itself as an explosion of monstrous force, which, of course, immediately interested the military departments.

The Joliot-Curies. 1940s

L. Meitner and O. Hahn. 1925

Before the outbreak of World War II, Germany and some other countries carried out highly classified work on the creation of nuclear weapons. In the United States, research designated as the "Manhattan Project" started in 1941; a year later, the world's largest research laboratory was founded in Los Alamos. The project was administratively subordinated to General Groves, scientific leadership was carried out by University of California professor Robert Oppenheimer. The project was attended by the largest authorities in the field of physics and chemistry, including 13 laureates Nobel Prize People: Enrico Fermi, James Frank, Niels Bohr, Ernest Lawrence and others.

The main task was to obtain a sufficient amount of uranium-235. It was found that plutonium-2 39 could also serve as a charge for the bomb, so work was carried out in two directions at once. The accumulation of uranium-235 was 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. Enrichment of natural uranium was carried out at the plants of the Westinghouse company, and for the production of plutonium it was necessary to build a nuclear reactor.

It was in the reactor that the process of irradiating uranium rods with neutrons took place, as a result of which part of the uranium-238 was supposed to turn into plutonium. The sources of neutrons were fissile atoms of uranium-235, but the capture of neutrons by uranium-238 prevented the chain reaction from starting. The discovery of Enrico Fermi, who discovered that neutrons slowed down to a speed of 22 ms, caused a chain reaction of uranium-235, but were not captured by uranium-238, helped solve the problem. As a moderator, Fermi proposed a 40-cm layer of graphite or heavy water, which includes the hydrogen isotope deuterium.

R. Oppenheimer and Lieutenant General L. Groves. 1945

Calutron at Oak Ridge.

An experimental reactor was built in 1942 under the stands of the Chicago stadium. On December 2, its successful experimental launch took place. A year later, a new enrichment plant was built in the city of Oak Ridge and a reactor for the industrial production of plutonium was launched, as well as a calutron device for the electromagnetic separation of uranium isotopes. The total cost of the project was about $2 billion. Meanwhile, at Los Alamos, work was going on directly on the device of the bomb and methods for detonating the charge.

On June 16, 1945, near the city of Alamogordo in New Mexico, during tests code-named Trinity (“Trinity”), the world's first nuclear device with a plutonium charge and an implosive (using chemical explosives for detonation) detonation scheme was detonated. The power of the explosion was equivalent to an explosion of 20 kilotons of TNT.

The next step was combat use nuclear weapons against Japan, which, after the surrender of Germany, alone continued the war against the United States and its allies. On August 6, an Enola Gay B-29 bomber, under the command of Colonel Tibbets, dropped a Little Boy (“baby”) bomb on Hiroshima with a uranium charge and a cannon (using the connection of two blocks to create a critical mass) detonation scheme. The bomb was parachuted down and exploded at an altitude of 600 m from the ground. On August 9, Major Sweeney's Box Car aircraft dropped the Fat Man plutonium bomb on Nagasaki. The consequences of the explosions were terrible. Both cities were almost completely destroyed, more than 200 thousand people died in Hiroshima, about 80 thousand in Nagasaki. Later, one of the pilots admitted that they saw at that moment the most terrible thing that a person can see. Unable to resist the new weapons, the Japanese government capitulated.

Hiroshima after the atomic bombing.

The explosion of the atomic bomb put an end to the Second World War, but in fact began a new "cold" war, accompanied by an unrestrained race nuclear weapons. Soviet scientists had to catch up with the Americans. In 1943, a secret "laboratory No. 2" was created, headed by the famous physicist Igor Vasilyevich Kurchatov. Later, the laboratory was transformed into the Institute of Atomic Energy. In December 1946, the first chain reaction. Two years later, the first plutonium plant with several industrial reactors was built in the Soviet Union, and in August 1949, a test explosion of the first Soviet atomic bomb with a plutonium charge RDS-1 with a capacity of 22 kilotons was carried out at the Semipalatinsk test site.

In November 1952, on the Eniwetok Atoll in pacific ocean The United States detonated the first thermonuclear weapon, the destructive power of which arose due to the energy released during nuclear fusion light elements to heavier ones. Nine months later, at the Semipalatinsk test site, Soviet scientists tested the RDS-6 thermonuclear, or hydrogen, 400-kiloton bomb developed by a group of scientists led by Andrei Dmitrievich Sakharov and Yuli Borisovich Khariton. In October 1961, a 50-megaton Tsar Bomba, the most powerful hydrogen bomb ever tested, was detonated at the test site of the Novaya Zemlya archipelago.

I. V. Kurchatov.

At the end of the 2000s, the United States had approximately 5,000 and Russia 2,800 nuclear weapons on deployed strategic launchers, as well as a significant number of tactical nuclear weapons. This reserve is enough to destroy the entire planet several times. Just one thermonuclear bomb of average yield (about 25 megatons) is equal to 1,500 Hiroshima.

In the late 1970s, research was underway to create a neutron weapon, a type of low-yield nuclear bomb. A neutron bomb differs from a conventional nuclear bomb in that it artificially increases the portion of the explosion energy that is released in the form of neutron radiation. This radiation affects the manpower of the enemy, affects his weapons and creates radioactive contamination of the area, while the impact of the shock wave and light radiation is limited. However, not a single army in the world has taken neutron charges into service.

Although the use of atomic energy has brought the world to the brink of destruction, it also has a peaceful side, although it is extremely dangerous when it gets out of control, this was clearly shown by the accidents at the Chernobyl and Fukushima nuclear power plants. The world's first nuclear power plant with a capacity of only 5 MW was launched on June 27, 1954 in the village of Obninskoye Kaluga region(now the city of Obninsk). To date, more than 400 nuclear power plants are in operation in the world, 10 of them in Russia. They generate about 17% of the world's electricity, and this figure is likely to only increase. At present, the world cannot do without the use of nuclear energy, but we want to believe that in the future, humanity will find a safer source of energy supply.

Control panel of the nuclear power plant in Obninsk.

Chernobyl after the disaster.

The investigation took place in April-May 1954 in Washington and was called, in the American manner, "hearings."
Physicists participated in the hearings (with a capital P!), but for the scientific world of America the conflict was unprecedented: not a dispute about priority, not an undercover struggle of scientific schools, and not even the traditional confrontation between a forward-looking genius and a crowd of mediocre envious people. In the trial, it sounded authoritatively keyword- "loyalty". The accusation of "disloyalty", which acquired a negative, formidable meaning, entailed punishment: deprivation of access to works of the highest secrecy. The action took place in the Atomic Energy Commission (AEC). Main characters:

Robert Oppenheimer, native of New York, pioneer of quantum physics in the USA, scientific adviser Manhattan Project, "father of the atomic bomb", successful scientific manager and refined intellectual, after 1945 national hero America...

During World War II, the brilliant physicist Ajulius Robert Oppenheimer led the development of American nuclear scientists to create the first atomic bomb in human history. The scientist led a secluded and secluded life, and this gave rise to suspicions of treason.

Atomic weapons are the result of all previous developments in science and technology. Discoveries that are directly related to its occurrence were made at the end of the 19th century. A huge role in revealing the secrets of the atom was played by the studies of A. Becquerel, Pierre Curie and Marie Sklodowska-Curie, E. Rutherford and others.

In early 1939, the French physicist Joliot-Curie concluded that a chain reaction was possible that would lead to an explosion of monstrous destructive power and that uranium could become an energy source, like an ordinary explosive. This conclusion was the impetus for the development of nuclear weapons.

From 1939 to 1945, more than two billion dollars were spent on the Manhattan Project. A huge uranium refinery was built at Oak Ridge, Tennessee. H.C. Urey and Ernest O. Lawrence (inventor of the cyclotron) proposed a purification method based on the principle of gaseous diffusion followed by magnetic separation of two isotopes. A gas centrifuge separated the light Uranium-235 from the heavier Uranium-238.

On the territory of the United States, in Los Alamos, in the desert expanses of the state of New Mexico, in 1942, an American nuclear center was established. Many scientists worked on the project, but the main one was Robert Oppenheimer. Under his leadership, the best minds of that time were gathered not only from the USA and England, but from almost all of Western Europe. A huge team worked on the creation of nuclear weapons, including 12 Nobel Prize winners. Work in Los Alamos, where the laboratory was located, did not stop for a minute. In Europe, meanwhile, the Second World War was going on, and Germany carried out mass bombing of the cities of England, which endangered the English atomic project “Tub Alloys”, and England voluntarily transferred its developments and leading scientists of the project to the USA, which allowed the USA to take a leading position in the development of nuclear physics (creation of nuclear weapons).

Writing about this controversial man is not an easy task, but an interesting one, and the 20th century was marked by a number of books about him. However, the rich life of the scientist continues to attract biographers.

Oppenheimer was born in New York in 1903 to wealthy and educated Jewish parents. Oppenheimer was brought up in love for painting, music, in an atmosphere of intellectual curiosity. In 1922, he entered Harvard University and in just three years received an honors degree, his main subject was chemistry. In the next few years, the precocious young man traveled to several countries in Europe, where he worked with physicists who dealt with the problems of investigating atomic phenomena in the light of new theories. Just a year after graduating from university, Oppenheimer published a scientific paper that showed how deeply he understood new methods. Soon he, together with the famous Max Born, developed the most important part quantum theory known as the Born-Oppenheimer method. In 1927, his outstanding doctoral dissertation brought him worldwide fame.

In 1928 he worked at the Zurich and Leiden universities. In the same year he returned to the USA. From 1929 to 1947 Oppenheimer taught at the University of California and the California Institute of Technology. From 1939 to 1945 he actively participated in the work on the creation of an atomic bomb as part of the Manhattan Project; heading the specially created Los Alamos laboratory.

In 1939, the United States learned that in preparation for global war Nazi Germany discovered the fission of the atomic nucleus. Oppenheimer and other scientists immediately guessed that the German physicists would try to get a controlled chain reaction that could be the key to creating a weapon far more destructive than any that existed at that time. Enlisting the support of the great scientific genius, Albert Einstein, concerned scientists warned President Franklin D. Roosevelt of the danger in a famous letter. In authorizing funding for projects aimed at creating untested weapons, the president acted in strict secrecy. Ironically, many of the world's leading scientists, forced to flee their homeland, worked together with American scientists in laboratories scattered throughout the country. One part of the university groups explored the possibility of creating a nuclear reactor, others took up the solution of the problem of separating the uranium isotopes necessary for the release of energy in a chain reaction. Oppenheimer, who had previously been occupied with theoretical problems, was offered to organize a wide front of work only at the beginning of 1942.

Three days after The Kid was blown up in Hiroshima, exact copy The first "Fat Man" was dropped on the city of Nagasaki. On August 15, Japan, whose resolve had finally been broken by this new weapon, signed an unconditional surrender. However, the voices of skeptics were already being heard, and Oppenheimer himself predicted two months after Hiroshima that "mankind will curse the names of Los Alamos and Hiroshima."

The whole world was shocked by the explosions in Hiroshima and Nagasaki. Tellingly, Oppenheimer managed to combine the excitement of testing a bomb on civilians and the joy that the weapon had finally been tested.

Nevertheless, the following year he accepted an appointment as chairman of the scientific council of the Atomic Energy Commission (AEC), thus becoming the most influential adviser to the government and the military on nuclear issues. While the West and the Stalin-led Soviet Union were seriously preparing for cold war, each side focused on the arms race. Although many of the Manhattan Project's scientists did not support the idea of ​​creating a new weapon, former Oppenheimer employees Edward Teller and Ernest Lawrence felt that US national security required the rapid development of a hydrogen bomb. Oppenheimer was horrified. From his point of view, the two nuclear powers were already opposed to each other, like "two scorpions in a jar, each able to kill the other, but only at the risk of his own life." With the proliferation of new weapons in wars, there would no longer be winners and losers - only victims. And the "father of the atomic bomb" made a public statement that he was against the development of the hydrogen bomb. Always out of place under Oppenheimer and clearly envious of his accomplishments, Teller began to make an effort to head the new project, implying that Oppenheimer should no longer be involved in the work. He told FBI investigators that his rival was keeping scientists from working on the hydrogen bomb with his authority, and revealed the secret that Oppenheimer suffered bouts of severe depression in his youth. When President Truman agreed in 1950 to finance the development of the hydrogen bomb, Teller could celebrate victory.

In 1954, Oppenheimer's enemies launched a campaign to remove him from power, which they succeeded after a month-long search for "black spots" in his personal biography. As a result, a show case was organized in which Oppenheimer was opposed by many influential political and scientific figures. As Albert Einstein later put it: "Oppenheimer's problem was that he loved a woman who didn't love him: the US government."

By allowing Oppenheimer's talent to flourish, America doomed him to death.

Oppenheimer owns a number of popular books, including Science and the Common Understanding (Science and the Common Understanding, 1954), The Open Mind (The Open Mind, 1955), Some Reflections on Science and Culture (Some Reflections on Science and Culture, 1960) . Oppenheimer died in Princeton on February 18, 1967.

In Soviet times, it was claimed that the USSR solved its atomic problem completely independently, and Kurchatov was considered the "father" of the domestic atomic bomb. Although there were rumors about some secrets stolen from the Americans. And only in the 90s, 50 years later, one of the main actors of that time, Yuli Khariton, spoke about the significant role of intelligence in accelerating the backward Soviet project. And American scientific and technical results were obtained by Klaus Fuchs, who arrived in the English group.

Information from abroad helped the country's leadership to make a difficult decision - to start work on nuclear weapons during the most difficult war. Intelligence allowed our physicists to save time, helped to avoid a "misfire" during the first atomic test, which was of great political importance.

In 1939, a chain reaction of fission of uranium-235 nuclei was discovered, accompanied by the release of colossal energy. Shortly thereafter, articles on nuclear physics began to disappear from the pages of scientific journals. This could indicate a real prospect of creating an atomic explosive and weapons based on it.

After the discovery by Soviet physicists of spontaneous fission of uranium-235 nuclei and the determination of the critical mass, a corresponding directive was sent to the residency at the initiative of the head of the scientific and technological revolution L. Kvasnikov.

In the FSB of Russia (the former KGB of the USSR), 17 volumes of archival file No. 13676, which documented who and how attracted US citizens to work for Soviet intelligence, lie under the heading "keep forever" under the heading "keep forever". Only a few of the top leadership of the KGB of the USSR had access to the materials of this case, the classification of which was removed only recently. Soviet intelligence received the first information about the work on the creation of the American atomic bomb in the fall of 1941. And already in March 1942, extensive information about the ongoing research in the United States and England fell on the table of I.V. Stalin. According to Yu. B. Khariton, in that dramatic period it was more reliable to use the bomb scheme already tested by the Americans for our first explosion. "Considering state interests, any other solution was then invalid. The merit of Fuchs and our other assistants abroad is beyond doubt. However, we implemented the American scheme in the first test not so much for technical as for political reasons.

A test site was built near the city of Semipalatinsk. Exactly at 7:00 am on August 29, 1949, the first Soviet nuclear device under the code name "RDS-1" was blown up at this test site.

The Troyan plan, according to which atomic bombs were to be dropped on 70 cities of the USSR, was thwarted due to the threat of a retaliatory strike. The event that took place at the Semipalatinsk test site informed the world about the creation of nuclear weapons in the USSR.

The appearance of atomic (nuclear) weapons was due to a mass of objective and subjective factors. Objectively, the creation of atomic weapons came about thanks to the rapid development of science, which began with fundamental discoveries in the field of physics in the first half of the twentieth century. The main subjective factor was the military-political situation, when the states of the anti-Hitler coalition began an unspoken race to develop such powerful weapons. Today we will find out who invented the atomic bomb, how it developed in the world and the Soviet Union, and also get acquainted with its device and the consequences of its use.

Creation of the atomic bomb

From a scientific point of view, the distant 1896 was the year of the creation of the atomic bomb. It was then that the French physicist A. Becquerel discovered the radioactivity of uranium. Subsequently, the uranium chain reaction came to be seen as a source of tremendous energy, and easy to develop the most dangerous weapons in the world. Nevertheless, Becquerel is rarely mentioned when talking about who invented the atomic bomb.

Over the next few decades, scientists different corners Earth has been detected alpha, beta and gamma rays. At the same time, a large number of radioactive isotopes were discovered, the law of radioactive decay was formulated, and the beginning of the study of nuclear isomerism was laid.

In the 1940s, scientists discovered the neuron and the positron, and for the first time performed the fission of the nucleus of the uranium atom, accompanied by the absorption of neurons. It was this discovery that became a turning point in history. In 1939, the French physicist Frédéric Joliot-Curie patented the world's first nuclear bomb, which he developed with his wife out of purely scientific interest. It is Joliot-Curie who is considered the creator of the atomic bomb, despite the fact that he was a staunch defender of world peace. In 1955, he, along with Einstein, Born and a number of other famous scientists, organized the Pugwash Movement, whose members advocated peace and disarmament.

Rapidly developing, atomic weapons have become an unprecedented military-political phenomenon that allows you to ensure the safety of its owner and reduce to a minimum the capabilities of other weapons systems.

How is a nuclear bomb made?

Structurally, an atomic bomb consists of a large number of components, the main of which are the body and automation. The case is designed to protect automation and a nuclear charge from mechanical, thermal, and other influences. Automation controls the time parameters of the explosion.

It consists of:

1. Emergency demolition.
2. Arming and safety devices.
3. Power supply.
4. Various sensors.

Transportation of atomic bombs to the place of attack is carried out with the help of missiles (anti-aircraft, ballistic or cruise). Nuclear ammunition can be part of a land mine, torpedo, aerial bomb and other elements. For atomic bombs, various detonation systems are used. The simplest is a device in which a projectile hitting a target, causing the formation of a supercritical mass, stimulates an explosion.

Nuclear weapons can be of large, medium and small caliber. The power of the explosion is usually expressed in terms of TNT. Small-caliber atomic shells have a capacity of several thousand tons of TNT. Medium-caliber ones already correspond to tens of thousands of tons, and the capacity of large-caliber reaches millions of tons.

Principle of operation

The principle of operation of a nuclear bomb is based on the use of energy released during a nuclear chain reaction. During this process, heavy particles are divided and light particles are synthesized. When an atomic bomb explodes, a huge amount of energy is released in a short period of time over a small area. That is why such bombs are classified as weapons of mass destruction.

In the area of ​​a nuclear explosion, two key areas are distinguished: 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. These shocks bring harm to the environment only within a radius of several hundred meters from the point of explosion.

Affecting factors

Nuclear weapons have the following damage factors:

1. radioactive contamination.
2. Light emission.
3. shock wave.
4. electromagnetic impulse.
5. penetrating radiation.

The consequences of an atomic bomb explosion are detrimental to all living things. Due to release huge amount light and warm energy 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, thanks to which it blast wave caused terrible 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 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, intelligence officers of the USSR handed over from England materials of closed scientific works 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, American residents have contributed to the introduction of reliable Soviet agents to the main centers of nuclear research in the United States. 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:

1. RDS-1. A bomb with a plutonium charge that is detonated by spherical compression. The device was borrowed from the Americans.
2. 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 Troyan plan appeared, according to which on January 1, 1950, it was planned to start hostilities 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:

1. America (since 1945).
2. USSR, and now Russia (since 1949).
3. England (since 1952).
4. France (since 1960).
5. China (since 1964).
6. India (since 1974).
7. Pakistan (since 1998).
8. Korea (since 2006).

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

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 nuclear weapons today 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.

There are many different political clubs in the world. Big, now already, seven, big twenty, BRICS, SCO, NATO, European Union, to some extent. However, none of these clubs can boast a unique function - the ability to destroy the world as we know it. The "nuclear club" possesses similar possibilities.

To date, there are 9 countries with nuclear weapons:

• Russia;
• Great Britain;
• France;
• India
• Pakistan;
• Israel;
• DPRK.

Countries are ranked according to the appearance of nuclear weapons in their arsenal. If the list were built by the number of warheads, then Russia would be in first place with its 8,000 units, 1,600 of which can be launched right now. The states are only 700 units behind, but "at hand" they have 320 more charges. "Nuclear club" is a purely conditional concept, in fact there is no club. There are a number of agreements between the countries on non-proliferation and the reduction of stockpiles of nuclear weapons.

The first tests of the atomic bomb, as you know, were carried out by the United States back in 1945. This weapon was tested in the "field" conditions of the Second World War on the inhabitants of the Japanese cities of Hiroshima and Nagasaki. They operate on the principle of division. During the explosion, a chain reaction is started, which provokes the fission of the nuclei into two, with the accompanying release of energy. Uranium and plutonium are mainly used for this reaction. It is with these elements that our ideas about what are made of nuclear bombs. Since uranium occurs in nature only as a mixture of three isotopes, of which only one is capable of supporting such a reaction, it is necessary to enrich uranium. The alternative is plutonium-239, which does not occur naturally and must be produced from uranium.

If a fission reaction occurs in a uranium bomb, then a fusion reaction occurs in a hydrogen bomb - this is the essence of how a hydrogen bomb differs from an atomic bomb. We all know that the sun gives us light, warmth, and one might say life. The same processes that take place in the sun can easily destroy cities and countries. The explosion of a hydrogen bomb was born by the fusion reaction of light nuclei, the so-called thermonuclear fusion. This "miracle" is possible thanks to hydrogen isotopes - deuterium and tritium. That is why the bomb is called a hydrogen bomb. You can also see the name "thermonuclear bomb", from the reaction that underlies this weapon.

After the world saw the destructive power of nuclear weapons, in August 1945, the USSR began a race that continued until its collapse. The United States was the first to create, test and use nuclear weapons, the first to detonate a hydrogen bomb, but the USSR can be credited with the first production of a compact hydrogen bomb that can be delivered to the enemy on a conventional Tu-16. The first US bomb was the size of a three-story house, a hydrogen bomb of this size is of little use. The Soviets received such weapons as early as 1952, while the first "adequate" US bomb was adopted only in 1954. If you look back and analyze the explosions in Nagasaki and Hiroshima, you can conclude that they were not so powerful. . Two bombs in total destroyed both cities and killed, according to various sources, up to 220,000 people. Carpet bombing Tokyo in a day could take the lives of 150-200,000 people without any nuclear weapons. This is due to the low power of the first bombs - only a few tens of kilotons of TNT. Hydrogen bombs were tested with an eye to overcoming 1 megaton or more.

First Soviet bomb was tested with a claim of 3 Mt, but ended up testing 1.6 Mt.

The most powerful hydrogen bomb was tested by the Soviets in 1961. Its capacity reached 58-75 Mt, while the declared 51 Mt. "Tsar" plunged the world into a slight shock, in the literal sense. The shock wave circled the planet three times. There was not a single hill left at the test site (Novaya Zemlya), the explosion was heard at a distance of 800 km. The fireball reached a diameter of almost 5 km, the “mushroom” grew by 67 km, and the diameter of its cap was almost 100 km. The consequences of such an explosion in a large city are hard to imagine. According to many experts, it was the test of a hydrogen bomb of such power (the States had four times less bombs at that time) that was the first step towards signing various treaties to ban nuclear weapons, test them and reduce production. The world for the first time thought about its own security, which was really under threat.

As mentioned earlier, the principle of operation of a hydrogen bomb is based on a fusion reaction. Thermonuclear fusion is the process of fusion of two nuclei into one, with the formation of a third element, the release of a fourth and energy. The forces that repel the nuclei are colossal, so for the atoms to get close enough to merge, the temperature must be simply enormous. Scientists have been puzzling over the cold thermonuclear fusion, so to speak, they are trying to reset the synthesis temperature to room temperature, ideally. In this case, humanity will have access to the energy of the future. As for the fusion reaction at the present time, to start it you still need to light a miniature sun here on Earth - usually bombs use a uranium or plutonium charge to start the fusion.

In addition to the consequences described above from the use of a bomb of tens of megatons, a hydrogen bomb, like any nuclear weapon, has a number of consequences from its use. Some people tend to think that the hydrogen bomb is a "cleaner weapon" than a conventional bomb. Perhaps it has something to do with the name. People hear the word "water" and think that it has something to do with water and hydrogen, and therefore the consequences are not so dire. In fact, this is certainly not the case, because the action of the hydrogen bomb is based on extremely radioactive substances. It is theoretically possible to make a bomb without a uranium charge, but this is impractical due to the complexity of the process, so the pure fusion reaction is "diluted" with uranium to increase power. At the same time, the amount of radioactive fallout grows to 1000%. Everything that enters the fireball will be destroyed, the zone in the radius of destruction will become uninhabitable for people for decades. Radioactive fallout can harm people's health hundreds and thousands of kilometers away. Specific figures, the area of ​​infection can be calculated, knowing the strength of the charge.

However, the destruction of cities is not the worst thing that can happen "thanks" to weapons of mass destruction. After a nuclear war, the world will not be completely destroyed. Thousands of large cities, billions of people will remain on the planet, and only a small percentage of territories will lose their status as “livable”. In the long term, the whole world will be at risk due to the so-called "nuclear winter". Undermining the nuclear arsenal of the "club" can provoke the release into the atmosphere of a sufficient amount of matter (dust, soot, smoke) to "diminish" the brightness of the sun. A veil that can spread across the planet will destroy crops for several years to come, provoking famine and inevitable population decline. There has already been a “year without a summer” in history, after a major volcanic eruption in 1816, so a nuclear winter looks more than real. Again, depending on how the war proceeds, we can get the following types of global climate change:

• cooling by 1 degree, will pass unnoticed;
• nuclear autumn - cooling by 2-4 degrees, crop failures and increased formation of hurricanes are possible;
• an analogue of "a year without summer" - when the temperature dropped significantly, by several degrees per year;
• the Little Ice Age - the temperature can drop by 30 - 40 degrees for a considerable time, will be accompanied by depopulation of a number of northern zones and crop failures;
• ice age - the development of small ice age when the reflection of the sun's rays from the surface can reach a certain critical level and the temperature will continue to fall, the difference is only in temperature;
• irreversible cooling is a very sad version of the ice age, which, under the influence of many factors, will turn the Earth into a new planet.

The nuclear winter theory is constantly being criticized, and its implications seem a little overblown. However, one should not doubt its imminent offensive in any global conflict with the use of hydrogen bombs.

The Cold War is long over, and therefore, nuclear hysteria can only be seen in old Hollywood films and on the covers of rare magazines and comics. Despite this, we may be on the verge of a serious nuclear conflict, if not a big one. All this thanks to the lover of rockets and the hero of the fight against the imperialist habits of the United States - Kim Jong-un. H-bomb North Korea is still a hypothetical object, only circumstantial evidence speaks of its existence. Of course, the North Korean government constantly reports that they have managed to make new bombs, so far no one has seen them live. Naturally, the States and their allies, Japan and South Korea, are a little more concerned about the presence, even if hypothetical, of such weapons in the DPRK. The reality is that the this moment North Korea does not have enough technology to successfully attack the United States, which they announce to the whole world every year. Even an attack on neighboring Japan or the South may not be very successful, if at all, but every year the danger of a new conflict on the Korean peninsula is growing.