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thorium
(Encyclopedia)thorium thôrˈēəm [key] [from Thor], radioactive chemical element; symbol Th; at. no. 90; mass number of most stable isotope 232; m.p. about 1,750℃; b.p. about 4,790℃; sp. gr. 11.7 at 20℃; va...barn
(Encyclopedia)barn, abbr. b, in physics, unit of nuclear cross section, i.e., the effective target presented by a nucleus for collisions leading to nuclear reactions; it is equal to 10−24 square centimeters. The ...radioactive waste
(Encyclopedia)radioactive waste, material containing the unusable radioactive byproducts of the scientific, military, and industrial applications of nuclear energy. Since its radioactivity presents a serious health...CERN
(Encyclopedia)CERN or European Organization for Nuclear Research, nuclear and particle physics research center straddling the French-Swiss border W of Geneva, Switzerland. Established in 1952 as the provisional Eur...hydrogen bomb
(Encyclopedia)hydrogen bomb or H-bomb, weapon deriving a large portion of its energy from the nuclear fusion of hydrogen isotopes. In an atomic bomb, uranium or plutonium is split into lighter elements that togethe...Lange, David Russell
(Encyclopedia)Lange, David Russell lăng [key], 1942–2005, New Zealand politician. After receiving his law degree (LL.M., 1970) he fought for the rights of the underprivileged in Auckland, and was elected to the ...García Robles, Alfonso
(Encyclopedia)García Robles, Alfonso älfônˈsō gärsēˈä rōˈblās [key], 1911–91, Mexican statesman, b. Zamora, Mex. After studying law in Europe, he entered the Mexican foreign service in 1939. He was a ...European Atomic Energy Community
(Encyclopedia)European Atomic Energy Community (Euratom or EAEC), economic organization that came into being as the 3d treaty organization of what has become the European Union; established by the Treaty of Rome (1...Fowler, William Alfred
(Encyclopedia)Fowler, William Alfred, 1911–95, American nuclear astrophysicist, b. Pittsburgh. While a professor at the California Institute of Technology, Fowler studied how chemical elements are formed in nucle...Aiken
(Encyclopedia)Aiken, city (2020 pop. 32,025), seat of Aiken co., W S.C.; inc. 1835. A resort and polo center and a training area for Thoroughbreds, Aiken has apparel, printing and publishing, drug, and ...Browse by Subject
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