radium emanation

Japanese: radium emanation(英語表記)radiumemanation
radium emanation

…In 1898, Curie and his wife discovered that the air around radium compounds was radioactive, and in 1900, F. Dorn proved that this was due to a gas generated from radium. Furthermore, E. Rutherford et al., F. Soddy, and W. Ramsay in England confirmed that this gas was an inert gas and belonged to group 0 of the periodic table, and called it radium emanation. Ramsay and R.W. Gray also showed that it was the heaviest gas known up to that point by measuring its specific gravity, and proposed to call it niton, after the Latin nitere (to shine), because it emits phosphorescence when liquefied in a glass tube, but at an international conference in 1923, the name radon was adopted because it was produced by decomposition from radium. …

*Some of the terminology that mentions "radium emanation" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…1898年キュリー夫妻はラジウムの化合物の周囲の空気が放射性をもつことを見いだし,これをドルンF.Dornが1900年ラジウムから発生する気体によるものであることを明らかにした。さらにイギリスのE.ラザフォードら,F.ソディ,W.ラムゼーは,この気体が不活性ガスで,周期表中0族に属することを確かめ,ラジウムエマネーションradium emanationと呼んだ。またラムゼーはグレーR.W.Grayとともに比重の測定からそれまでに知られた最も重い気体であることを示し,ガラス管中で気体を液化するとリン光を発するのでラテン語のnitere(輝く)にちなんでニトンnitonと呼ぶことを提唱したが,1923年国際会議でラジウムから変脱生成するものということからラドンの名称が採用された。…

※「radium emanation」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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