This law states that when a nuclide belonging to a radioactive decay series undergoes alpha decay, the relationship between the decay constant λ and the distance (range) R that the alpha particle travels before stopping in the air is log λ = A + B log R ( A and B are constants specific to each series). It was discovered by H. Geiger and J. Nuttall in 1911. This law was explained as the tunnel effect by G. Gamow, EU Condon, and R.W. Gurney. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
放射性崩壊系列に属する核種がα崩壊するとき崩壊定数λとα粒子が空気中で止るまでに走る距離 (飛程) R との間に関係式 log λ=A+B log R ( A ,B は各系列に固有な定数) が成立するという法則。 1911年 H.ガイガーと J.ヌッタルが発見した。この法則は G.ガモフ,E.U.コンドン,R.W.ガーニーらによりトンネル効果として説明された。
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