【摘要】 <正> 为测定稀土中²²⁷Ac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²²⁷Ac的分析方法。 方法一 除去稀土中的钍、铀后放置之,使²²⁷Ac生长子体²²⁷Th,测定²²⁷Th强度,用衰变公式推算出²²⁷Ac的含量。分析程序是:将1-10g含²²⁷Ac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萃取色更多还原

【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.更多还原