- The enriched uranium-235 was the critical element in creating an explosive fission reaction in nuclear bombs. The Manhattan Project team agreed on two distinct designs for the atomic bombs.prologue.blogs.archives.gov/2020/08/06/little-boy-the-first-atomic-bomb/
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The Little Boy gun-type atomic bomb dropped on Hiroshima on August 6, 1945, was made of highly enriched uranium with a large tamper. The nominal spherical critical mass for an untampered 235 U nuclear weapon is 56 kilograms (123 lb), [ 6 ] which would form a sphere 17.32 centimetres (6.82 in) in diameter. 展开
Uranium-235 ( U or U-235) is an isotope of uranium making up about 0.72% of natural uranium. Unlike the predominant isotope uranium-238, it is fissile, i.e., it can sustain a nuclear chain reaction. It is the only fissile isotope that exists … 展开
Uranium-235 has many uses such as fuel for nuclear power plants and in nuclear weapons such as nuclear bombs. Some artificial satellites, such as the SNAP-10A and the 展开
CC-BY-SA 许可证中的维基百科文本 Science Behind the Atom Bomb - Nuclear Museum
2014年6月5日 · Most uranium found naturally in the world exists as uranium-238, leaving only 0.7% of naturally existing uranium as the U-235 isotope. When a neutron bombards U-238, the isotope often captures the neutron to become U …
Little Boy - Wikipedia
Little Boy was a type of atomic bomb created by the United States as part of the Manhattan Project during World War II. The name is also often used to describe the specific bomb (L-11) used in the bombing of the Japanese city of Hiroshima by the Boeing B-29 Superfortress Enola Gay on 6 August 1945, making it the first nuclear weapon used in warfare, and the second nuclear explosion in history, …
Wikipedia · CC-BY-SA 许可下的文字Uranium-235 (U-235) | Definition, Uses, Half-Life, & Facts | Britannica
2025年1月25日 · This series of rapidly multiplying fissions culminates in a chain reaction in which nearly all the fissionable material is consumed, in the process generating the explosion of what …
Atomic bomb | History, Properties, Proliferation, & Facts | Britannica
- atomic bomb, weapon with great explosive power that results from the sudden release of energy upon the splitting, or fission, of the nuclei of a heavy element such as plutonium or uranium.
- 发布日期: 1998年7月20日
Manhattan Project: The Uranium Path to the Bomb, 1942-1944
The uranium path to the atomic bomb ran through Oak Ridge, Tennessee. Only if the new plants built at Oak Ridge produced enough enriched uranium-235 would a uranium bomb be possible.
Atomic forces within the nucleus are much stronger than chemical forces. U-235 in an atom bomb therefore liberates much more energy than exploding the same mass of TNT. The bomb used …
Manhattan Project: Processes > URANIUM ISOTOPE …
Of the two, only uranium-235 is capable of the sustained fission chain-reaction necessary for an atomic bomb. Uranium-235, however, comprises less than one percent of natural uranium, and the use of uranium to build an atomic bomb …
Critical Mass and Bomb Construction - Chemistry …
2023年6月26日 · Little Boy was a uranium weapon containing 141.4 pounds of fissionable material containing 82.7% U-235. Only about two pounds fissioned, releasing an energy equivalent to 15-16,000 tons of TNT. The immediate …
Gun-type fission weapon - Wikipedia
The uranium-235 is indicated in red. The "gun" method is roughly how the Little Boy weapon, which was detonated over Hiroshima, worked, using uranium-235 as its fissile material. In the Little …
