...Radioisotopes produced during the decay of natural radioactive elements include 210 Pb (β - decay, half-life 20.4 years, called RaD, uranium series), 211 Pb ( β- , 36.1 minutes, AcB, actinium series), 212 Pb ( β- , 10.64 hours, ThB, thorium series), and 214 Pb ( β- , 26.8 minutes, RaB, uranium series). In addition, 19 other radioisotopes with mass numbers from 194 to 213 are known. ... *Some of the terminology that mentions "RaB" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…また天然放射性元素の崩壊の途中に生成する放射性同位体としては,210Pb(β-崩壊,半減期20.4年,RaDと呼ばれる。ウラン系列),211Pb(β-,36.1分,AcB,アクチニウム系列),212Pb(β-,10.64時間,ThB,トリウム系列),214Pb(β-,26.8分,RaB,ウラン系列)がある。そのほか質量数194から213まで19種の放射性同位体が知られている。… ※「RaB」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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