模拟放射性污染土壤样品中147 Pm 的分离及液闪测量

摘要

本工作针对受乏燃料污染的环境土壤样品，研究了 Pm 的分离纯化方法，建立了147 Pm 的分析流程，流程收率大于70%，对主要干扰核素的去污因子大于103。同时，通过147 Pm 标准源对效率示踪法测量结果进行验证，测量值与推荐值相对偏差小于0.5%。将该方法应用于模拟样品分析，其结果与147 Nd 测量推荐值的相对偏差小于2%。%Focused on the environmental soil sample contaminated by spent fuel,a Pm sepa-ration procedure was established with a recovery greater than 70% for Pm and the decontam-ination factor greater than 10 3 for the interference elements.The activity of 1 47 Pm standard sample was determined by liquid scintillation counting (LSC)with the efficiency tracing method (ETM),giving a relative deviation less than 0.5%.The analysis method of 1 47 Pm was validated for simulated polluted soil sample (prepared by mixing the spent fuel with environmental soil)and the results are in good agreement with the referenced data with a relative deviation of 2%.