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The web page traces the history of nuclear fission from the discovery of radioactivity by Becquerel and the Curies to the Nobel Prize-winning work of Hahn, Meitner, Strassmann and Frisch in 1938. It also explains the mechanism, applications and background of fission, and the role of neutrons, isotopes and elements in the process.
The Atomic Age is the period after 1945, when nuclear weapons and power were first used and developed. Learn about the scientific discoveries, the military applications, the social and environmental effects, and the cultural representations of the Atomic Age.
A comprehensive list of significant discoveries in physics and the laws of nature, from ancient times to the 21st century. Includes experimental discoveries, theoretical proposals, and influential theories in various branches of physics.
1932 – James Chadwick discovers the neutron, leading to experiments in which elements are bombarded with the new particle. [5] [6]1933 – Leó Szilárd realizes the concept of the nuclear chain reaction, although no such reaction was known at the time.
Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei, releasing large amounts of energy and neutrons. Learn about the discovery, mechanism, products, and uses of fission for nuclear power and weapons.
This web page lists significant events in the study and use of nuclear fusion from 1920 to 2010. It does not answer the query directly, but it shows that fusion was first observed in 1932 and used for weapons in 1952.
Oklo is the only known location where self-sustaining nuclear fission reactions occurred in the past, about 1.7 billion years ago. Learn how Oklo was discovered, how its uranium and fission products were analyzed, and what conditions and implications this phenomenon has for nuclear science.
A nuclear chain reaction occurs when one nuclear reaction causes one or more subsequent nuclear reactions, releasing large amounts of energy. The web page explains the history, process and applications of nuclear fission chain reactions, which produce neutrons and fission fragments.