フェルミウム

解説フェルミウム，Fm．原子番号100の元素．電子配置[Rn]5f 127s2の周期表3族アクチノイド元素．8番目に発見された超ウラン元素．E. Fermi(フェルミ)の死去1年後の1955年に発見が発表され，かれの名前にちなんで命名された．

来歴The name of Fermium (Fm） derives from the Italian born physicist “Enrico Fermi”, who built the first man made nuclear reactor. The nuclide . . . Fermium (Fm） was found in the debris from the first thermonuclear weapon’s explosion, nicknamed “Mike,” on November 1, 1952, at Enewetak atoll, Marshall Islands, by a collaboration of American scientists G.R. Choppin, S.G.Thompson, A. Ghiorso and B.G. Harvey from the Argonne National Laboratory near Chicago, Illinois, the Los Alamos Scientific Laboratory in Los Alamos, New Mexico and the University of California lab at Berkeley, CA. The longest half-life associated with this unstable element is 100 day 257Fm.