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Seaborg, Glenn Theodore

(Encyclopedia)Seaborg, Glenn Theodore sēˈbôrg [key], 1912–99, American chemist, b. Ishpeming, Mich., grad. Univ. of California at Los Angeles, 1934, Ph.D. Univ. of California at Berkeley, 1937. In 1939, he beg...

European Organization for Nuclear Research

(Encyclopedia)European Organization for Nuclear Research: see CERN. ...

sun, in astronomy

(Encyclopedia)CE5 Structure of the sun sun, intensely hot, self-luminous body of gases at the center of the solar system. Its gravitational attraction maintains the planets, comets, and other bodies of the sola...

chain reaction

(Encyclopedia)CE5 Chain reaction: A neutron (n) strikes the uranium nucleus (U-235), causing it to split into fission products A and B and release two neutrons. These neutrons can in turn cause further fissions....

Rockville

(Encyclopedia)Rockville, city (1990 pop. 44,835), seat of Montgomery co., W central Md., a NW suburb of Washington, D.C.; settled c.1760s, inc. as a city 1860. It has several scientific research and technology labo...

Joliot-Curie

(Encyclopedia)Joliot-Curie ērĕnˈ [key], 1897–1956, daughter of Pierre and Marie Curie, were married in 1926. Both were assistants at the Radium Institute in Paris, of which Irène, succeeding her mother, was d...

Dyson, Freeman John

(Encyclopedia)Dyson, Freeman John dīˈsən [key], 1923–2020, British-American theoretical physicist and mathematician, studied Trinity College, Cambridge (B.A., 1945) and Cornell. He did bomber operations resear...

Koizumi, Junichiro

(Encyclopedia)Koizumi, Junichiro jo͝onēˈchērō kōēˈzo͞omē [key], 1942–, Japanese political leader, b. Yokosuka. From a political family, he studied economics at Keio Univ. (grad. 1967). He entered politi...

tritium

(Encyclopedia)tritium trĭtˈēəm [key], radioactive isotope of hydrogen with mass number 3. The tritium nucleus, called a triton, contains one proton and two neutrons. It has a half-life of 12.5 years and decays ...

International Campaign to Abolish Nuclear Weapons

(Encyclopedia)International Campaign to Abolish Nuclear Weapons (ICAN), coalition of nongovernmental organizations that was formed in 2007 to advocate for the banning of nuclear weapons. It is based in Geneva, Swit...