稀土中~(227)Ac的测定

THE DETERMINATION OF 227Ac IN RARE EARTHS.

摘要: <正> 为测定稀土中~(227)Ac放射性核素及其含量,本工作拟定了除镭和未经除镭的稀土产品中~(227)Ac的分析方法。方法一除去稀土中的钍、铀后放置之,使~(227)Ac生长子体~(227)Th,测定~(227)Th强度,用衰变公式推算出~(227)Ac的含量。分析程序是:将1-10g含~(227)Ac稀土氧化物制成盐酸溶液,再通过HDEHP萃取色谱柱Ⅰ,除去钍、铀等,样品放置3-6天,再通过HDEHP萃取色

Abstract: In this paper two methods of analysis is described. One method consists of the removal of U andTh from rare earths containing 227Ac by means of HDEHP chromatographic column Ⅰ. 227Ac is allowed to decay to 227Th which is first purified by running through a second HDEHP column (column Ⅱ) and then electroplated to count its activity. Another method consists of using a Mg aslt of HDEHP for the extraction. The sensitivity of the method is 3.2×10-15 Ci/g.