Yttrium 90 - Yttrium

Japanese: イットリウム90 - いっとりうむ
Yttrium 90 - Yttrium

…It is also produced in nuclear reactors at nuclear power plants, but is not released into the environment. 90 Sr decays into yttrium 90 90 Y, and 90 Y also decays into stable zirconium 90 90 Zr with a half-life of two and a half days. Normally, 90 Sr and 90 Y are in radioactive equilibrium. …

*Some of the terminology that mentions "Yttrium 90" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…原子力発電所等の原子炉内でも生成されるが,環境中に放出されることはない。90Srはβ崩壊してイットリウム9090Yに変化し,90Yも2日半の半減期でβ崩壊し,安定なジルコニウム90 90Zrに変わる。通常,90Srと90Yとは放射平衡になっている。…

※「イットリウム90」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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