But we had hardly started to adjust our thinking to this new uranium weapon when we were faced with the hydrogen bomb.

For example, the analysis of the debris at the testing site of the first U. S. hydrogen bomb, Ivy Mike, ( 1 November 1952, Enewetak Atoll ), revealed high concentrations of various actinides including americium ; due to military secrecy, this result was published only in 1956.

After moving to Sarov in 1950, Sakharov played a key role in the development of the first megaton-range Soviet hydrogen bomb using a design known as " Sakharov's Third Idea " in Russia and the Teller-Ulam design in the United States.

Truman ordered the development of a hydrogen bomb.

A hydrogen bomb — which produced nuclear fusion instead of nuclear fission — was first tested by the United States in November 1952 and the Soviet Union in August 1953.

* Canopus ( nuclear test ) was the name given to the first test of the French hydrogen bomb, in 1968, with a yield of 2. 8 megatons

When Russia successfully tested a hydrogen bomb, Eisenhower, against the advice of Dulles, decided to initiate a disarmament proposal to the Russians.

Einsteinium was discovered as the debris of the first hydrogen bomb explosion in 1952, and named after Albert Einstein.

The test was carried out on November 1, 1952 at Enewetak Atoll in the Pacific Ocean and was the first successful test of a hydrogen bomb.

In 1954, the 23 man crew of the Japanese fishing vessel Lucky Dragon was exposed to radioactive fallout from a hydrogen bomb test at Bikini Atoll, in 1969, an ecologically catastrophic oil spill from an offshore well in California's Santa Barbara Channel, Barry Commoner's protest against nuclear testing, Rachel Carson's book Silent Spring, Paul R. Ehrlich's The Population Bomb all added anxiety about the environment.

After the detonation of the first Soviet fission bomb in August 1949, he, along with Isidor Rabi, wrote a strongly worded report for the committee which opposed the development of a hydrogen bomb on moral and technical grounds.

But Fermi also participated in preliminary work on the hydrogen bomb at Los Alamos as a consultant, and along with Stanislaw Ulam, calculated that the amount of tritium needed for Edward Teller's model of a thermonuclear weapon would be prohibitive, and a fusion reaction could not be assured to propagate even with this large quantity of tritium.

It was discovered in the debris of the first hydrogen bomb explosion in 1952, and named after Nobel laureate Enrico Fermi, one of the pioneers of nuclear physics.

Fermium was first discovered in the fallout from the ' Ivy Mike ' nuclear test ( 1 November 1952 ), the first successful test of a hydrogen bomb .< ref name =" lanl ">

* 1958 – A hydrogen bomb known as the Tybee Bomb is lost by the US Air Force off the coast of Savannah, Georgia, never to be recovered.

In 1954, the island was destroyed by a hydrogen bomb test, just months before Godzilla first attacked Tokyo.

Things changed in 1953 with the Soviet testing of their first hydrogen bomb, but it was not until 1954 that the Atlas missile program was given the highest national priority.

* 1950 – President Harry S. Truman announces a program to develop the hydrogen bomb.

The United Kingdom supposedly conducted its first successful hydrogen bomb test at Malden Island on 15 May 1957 ; Christmas Island was the operation's main base.

While at the Los Alamos National Laboratory, Fuchs was responsible for many significant theoretical calculations relating to the first fission weapons and later, the early models of the hydrogen bomb, the first fusion weapon.

From late 1947 to May 1949, Fuchs gave Alexander Feklisov, his case officer, the principal theoretical outline for creating a hydrogen bomb and the initial drafts for its development as the work progressed in England and America.

Fuchs later testified that he passed detailed information on the project to the Soviet Union through a courier known as " Raymond " ( later identified as Harry Gold ) in 1945, and further information about the hydrogen bomb in 1946 and 1947.

Whether the information Fuchs passed relating to the hydrogen bomb would have been useful is still somewhat in debate.

Most scholars have agreed with the assessment made by Hans Bethe in 1952, which concluded that by the time Fuchs left the thermonuclear program — the summer of 1946 — there was too little known about the mechanism of the hydrogen bomb for his information to be of any necessary use to the Soviet Union ( the successful Teller-Ulam design was not discovered until 1951 ).

The nuclear dipole effects provide some information on the motions of the hydrogen nuclei, but the symmetry of the Af bond in Af remains in doubt.

Some engines convert heat from noncombustive processes into mechanical work, for example a nuclear power plant uses the heat from the nuclear reaction to produce steam and drive a steam engine, or a gas turbine in a rocket engine may be driven by decomposing hydrogen peroxide.

Fermi went home for lunch one day and returned with the explanation: the increased activity was due to hydrogen atoms in the wood slowing down neutrons ( later called moderation ) and this slowing caused them to be more active in nuclear reactions.

Some new helium is being created currently as a result of the nuclear fusion of hydrogen in stars.

In a nuclear thermal rocket or solar thermal rocket a working fluid, usually hydrogen, is heated to a high temperature, and then expands through a rocket nozzle to create thrust.

After a star has formed, it creates energy at the hot, dense core region through the nuclear fusion of hydrogen atoms into helium.

Above this mass, in the upper main sequence, the nuclear fusion process mainly uses atoms of carbon, nitrogen and oxygen as intermediaries in the CNO cycle that produces helium from hydrogen atoms.

Upon reaching a suitable density, energy generation is begun at the core using an exothermic nuclear fusion process that converts hydrogen into helium.

Once nuclear fusion of hydrogen becomes the dominant energy production process and the excess energy gained from gravitational contraction has been lost, the star lies along a curve on the Hertzsprung-Russell diagram ( or HR diagram ) called the standard main sequence.

The first flight of the Ares rocket ( not to be confused with the similarly named rocket of the now defunct Constellation Program ) would bring an unmanned Earth Return Vehicle to the red planet after a 6 month cruise phase, with a supply of hydrogen, a chemical plant and a small nuclear reactor.

A hydrogen nucleus is a single proton, so simultaneous nuclear interactions, which would occur within a heavier nucleus, don't need to be considered for the detection experiment.

The Sun is a main-sequence star, and thus generates its energy by nuclear fusion of hydrogen nuclei into helium.

Building upon the nuclear transmutation experiments by Ernest Rutherford, carried out several years earlier, the laboratory fusion of heavy hydrogen isotopes was first accomplished by Mark Oliphant in 1932.

Research into fusion for military purposes began in the early 1940s as part of the Manhattan Project, but this was not accomplished until 1951 ( see the Greenhouse Item nuclear test ), and nuclear fusion on a large scale in an explosion was first carried out on November 1, 1952, in the Ivy Mike hydrogen bomb test.

It is caused by the accretion of hydrogen on to the surface of the star, which ignites and starts nuclear fusion in a runaway manner.

The dependence of the hydrogen fusion rate on temperature and pressure means that it is only when it is compressed and heated at the surface of the white dwarf to a temperature of some 20 million kelvin that a nuclear fusion reaction occurs ; at these temperatures, hydrogen burns via the CNO cycle.

A neutron bomb is a fission-fusion thermonuclear weapon ( hydrogen bomb ) in which the burst of neutrons generated by a fusion reaction is intentionally allowed to escape the weapon, rather than being absorbed by its other components.

In turn, the U. S. countered by developing the vastly more powerful thermonuclear weapon, testing their first hydrogen bomb in 1952 at Ivy Mike, but the USSR quickly countered by testing their own thermonuclear weapons, with a test in 1953 of a semi-thermonuclear weapon of the Sloika design, and in 1956, with the testing of Sakharov's Third Idea – equivalent to the Castle Bravo device.

A hydrogen balloon with a load varying from a incendiary to one antipersonnel bomb and four incendiary devices attached, they were designed as a cheap weapon intended to make use of the jet stream over the Pacific Ocean and wreak havoc on Canadian and American cities, forests, and farmland.

Tsar Bomba (; " Emperor Bomb ") is the nickname for the AN602 hydrogen bomb, the most powerful nuclear weapon ever detonated and its October 30, 1961 test was the most powerful artificial explosion in human history.

The high pressure and temperature environment at the center of an exploding fission weapon compresses and heats a mixture of tritium and deuterium gas ( heavy isotopes of hydrogen ).

The initial impetus behind the two-stage weapon was President Truman's 1950 promise to build a 10-megaton hydrogen superbomb as the U. S. response to the 1949 test of the first Soviet fission bomb.

In 1954, to explain the surprising amount of fission-product fallout produced by hydrogen bombs, Ralph Lapp coined the term fission-fusion-fission to describe a process inside what he called a three-stage thermonuclear weapon.

* 1941-Enrico Fermi proposed the idea of using a ( still hypothetical ) fission weapon to initiate nuclear fusion in a mass of hydrogen to Edward Teller.

The first Ivy shot, Mike, was the first successful full-scale test of a multi-megaton thermonuclear weapon (" hydrogen bomb ") using the Teller-Ulam design.

Concluding that the hydrogen bomb was now required as deterrent as well as an offensive weapon, on January 31, 1950, Truman decided to proceed with development ; Johnson supported the president's decision.

Details of nuclear weapon design also affect neutron emission: the gun-type assembly Hiroshima bomb leaked far more neutrons than the implosion type 21 kt Nagasaki bomb because the light hydrogen nuclei ( protons ) predominating in the exploded TNT molecules ( surrounding the core of the Nagasaki bomb ) slowed down neutrons very efficiently while the heavier iron atoms in the steel nose forging of the Hiroshima bomb scattered neutrons without absorbing much neutron energy.

During the 1950s these included new hydrogen bomb designs, which were tested in the Pacific, and also new and improved fission weapon designs.

The weapon design tested was a new form of hydrogen bomb, and the scientists underestimated how vigorously some of the weapon materials would react.

The result of it was that the weapon makers of the U. K. had demonstrated all of the technologies that were needed to produce a one-megaton hydrogen bomb that weighed no more than one ton ( 2, 200 pounds ), and it was also immune to premature detonation caused by nearby nuclear explosions.

* There is a brief mention of red mercury being used as a weapon ( along with " foam-phase hydrogen " warheads ) in the novel Redemption Ark.

The Shadow ship's weapon detonates some of the local hydrogen, causing Lennier to think that it's a new weapon.