…There are about 10 known isotopes, of which the one with the longest half-life is 251 Cf (about 800 years). It was first obtained in 1950 by SGThompson and others in the United States, who bombarded curium 242 242 Cm with alpha particles, and was named after the University of California and the state where the research was carried out. It does not exist in nature, and is all artificially produced. … *Some of the terminology references "Thompson, SG" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…知られている同位体は約10種で,そのうち半減期の最も長いものは251Cf(約800年)。1950年アメリカのトムソンS.G.Thompsonらがキュリウム242 242Cmにα粒子を衝撃させてはじめて得られたもので,この研究の行われたカリフォルニア大学とその州の名にちなんで命名された。天然には存在せず,すべて人工的につくられる。… ※「Thompson,S.G.」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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