Transient Equilibrium - Kato Heiko
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...This formula shows that after enough time has passed, the ratio of the number of nuclei in A and B, N B / N A , will be constant regardless of the initial number of nuclei in A , N A 0 , and B will appear to decay with the half-life of A. This state is called transient equilibrium. Next, when λ B ≫ λ A , N B / N A is equal to λ A /λ B , and since N B λ B ＝ N A λ A holds, the radioactivity of A and B will be equal, and this state is called permanent equilibrium. ... *Some glossaries that mention "transient equilibrium" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
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…この式は十分時間が経過すれば，A,Bの原子核数の比NB/NAは最初のAの原子核数NA0に無関係に一定となり，見かけ上BはAの半減期で崩壊していくような現象を示す。このような状態を過渡平衡という。 次にλB≫λAの場合には，NB/NAはλA/λBに等しく，NBλB＝NAλAが成り立つのでA,Bの放射能は等しいことになり，この状態を永続平衡という。… ※「過渡平衡」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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