Tīmeklis知乎,中文互联网高质量的问答社区和创作者聚集的原创内容平台,于 2011 年 1 月正式上线,以「让人们更好的分享知识、经验和见解,找到自己的解答」为品牌使命。知 … TīmeklisRadium-226 (Ra) activity is normally determined indirectly by gamma spectrometry, in particular by measuring the characteristic γ-ray emitted from its progeny (Pb and Bi) when Ra-Rn secular equilibrium is reached. This article describes a measurement method involving the measurement of Pb ingrowth.
净辐射计算 - 百度文库
TīmeklisJ. Tölgyessy, M. Harangozó, in Encyclopedia of Analytical Science (Second Edition), 2005 Thorium. The only gaseous product in the thorium decay series is thoron, which has a very short half-life (56 s).It can be used to determine 220 Rn, and also its parent, 232 Th. Thorium is determined by comparison with a standard, but because of the … Tīmeklis知乎,中文互联网高质量的问答社区和创作者聚集的原创内容平台,于 2011 年 1 月正式上线,以「让人们更好的分享知识、经验和见解,找到自己的解答」为品牌使命。知乎凭借认真、专业、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容,聚集了中文互联网科技、商业、影视 ... regency semiconductors pte ltd
Radium 226 - an overview ScienceDirect Topics
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