【摘要】 用有源阱型中子符合计数器(AWCC)装置和JSR-12符合计数器对为有源符合中子无损测量而研制的铀标样首次进行试用性检验。测试了32个样品,其中,质量为20 g的样品24个、40 g样品4个及80 g样品4个。20和40 g样品的标准合成不确定度约为2%,80 g样品的标准合成不确定度在2%以内,大多数样品间的相对比值与称重给出的结果一致。更多还原

【Abstract】 A series of uranium standard samples used for active coincidence non-destructive assay were tested by using active well coincidence counter equipment and JSR-12 coincidence counter.The tested uranium standard samples are consists of 24 pieces of 20 g sample,4 pieces of 40 g sample and 4 pieces of 80 g sample.The results show that the combined relative standard uncertainty is about 2% for 20 g,40 g samples and less than 2 % for 80 g sample.更多还原