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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.
Learn how nuclear power was invented and developed from the discovery of fission to the first nuclear reactors and weapons. The web page covers the origins, the first nuclear reactor, the early years, and the current status of nuclear power.
So from Møller's remark the exciting vision arose that by assembling enough pure uranium (with appropriate care!) one might start a controlled chain reaction and liberate nuclear energy on a scale that really mattered. [22] The news of the discovery of fission was brought to America by Bohr in January 1939. [23]
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.
Lise Meitner (1878-1968) was a Jewish woman who made significant contributions to nuclear physics and radioactivity. She discovered protactinium, co-discovered nuclear fission with Otto Hahn and Otto Frisch, and faced persecution and exile under Nazi Germany.
Chicago Pile-1 (CP-1) was the first human-made self-sustaining nuclear chain reaction, initiated in 1942 by Enrico Fermi and his team at the University of Chicago. CP-1 was a key achievement for the Manhattan Project, the Allied effort to create nuclear weapons during World War II.
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.
Niels Bohr and John A. Wheeler applied the liquid drop model developed by Bohr and Fritz Kalckar to explain the mechanism of nuclear fission. [10] [11] Bohr had an epiphany that the fission at low energies was principally due to the uranium-235 isotope, while at high energies it was mainly due to the more abundant uranium-238 isotope. [12]