摘要
本文提出了不采用同位素示踪剂测定铀、钍同位素比活度的方法。用标准方法准确的测定地质样品中的铀、钍含量~［１］及^（２３４）Ｕ／^（２３８）Ｕ，^（２３０）Ｔｈ／^（２３２）Ｔｈ的活度比值~［２］，再应用铀、钍系的衰变特性，推导出计算样品中^（２３４）Ｕ，^（２３８）Ｕ，^（２３０）Ｔｈ和^（２３２）Ｔｈ比活度的方法。本方法计算所得之结果与^（２３２）Ｕ示踪法对比，均在１σ范围内，符合很好。
In this paper,a method of specific activity for the determination of uranium and thoriumisotopes without adopting isotope tracer is presented. By means of standard methods,the concentrations of uranium and thorium in geological samples and the activity ratio of ￣(234)U/￣(238)U,￣(230)Th/￣(232)Th are determined. According to the decay character of nuclides of uranium seriesand thorium series, specific activity of ￣(234)U, ￣(238)U, ￣(230)Th and ￣(232)Th is deduced. The calculationresults of this method are in good agreement with those obtained by ￣(232)U tracer method,andall are within the error range of 1σ.
出处
《铀矿地质》
CAS
CSCD
北大核心
1996年第5期307-312,共6页
Uranium Geology
关键词
比活度
同位素示踪法
铀
钍
同位素
地质样品
Specific activity
Method of adopting isotope tracer
Uranium and thorium
