英语词汇“half-life period”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

> as lemmas

half-life period

half-life period n. the time taken for the quantity or value of something (esp. radioactivity) to fall to half its original value; cf. sense A. 2.

1907 Jrnl. Chem. Soc. 91 ii. 1281 Rutherford and others have shown that whilst radium A, B, and C have a life-period of only a few hours, radium D has a half-life-period of forty years.

1942 J. D. Stranathan ‘Particles’ of Mod. Physics viii. 326 The half life period T of a radioactive substance is defined as the time required for one half of the active material present at any time to decay.

2008 Wear 265 627/1 The active species must have a half-life period compatible with the duration of the measurement.

extracted from half-lifen.adj.

as lemmas

单词	half-life period
释义	> as lemmas half-life period half-life period n. the time taken for the quantity or value of something (esp. radioactivity) to fall to half its original value; cf. sense A. 2. Π 1907 Jrnl. Chem. Soc. 91 ii. 1281 Rutherford and others have shown that whilst radium A, B, and C have a life-period of only a few hours, radium D has a half-life-period of forty years. 1942 J. D. Stranathan ‘Particles’ of Mod. Physics viii. 326 The half life period T of a radioactive substance is defined as the time required for one half of the active material present at any time to decay. 2008 Wear 265 627/1 The active species must have a half-life period compatible with the duration of the measurement. extracted from half-lifen.adj. < as lemmas
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