摘要
为建立反应堆铝合金样品中63 Ni活度测量的方法,在前期确定了样品前处理流程的基础上,进行了全程化学回收率实验、去污实验、镍载体量对测量效率的影响及空白实验等方面工作。全程化学回收率在70%以上,对各种杂质离子的去污因子均为102及以上,镍载体的加入量选为5mg。该方法对DPM(放射性核素每分钟衰变数)的标准偏差为6.29,相对标准偏差为15.9%,检出限为1.38Bq/g,已应用于反应堆退役样品的分析测量。
To establish a method of measuring the activity of 63Ni in aluminium alloy samples in reactor,the chemical yield,the decontamination,the effect of Ni carrier on measuring efficiency and blank experiments were studied based on the previous confirmed pre-treatment of samples.The chemical yield of this method is beyond 70%.The decontamination factor is more than 102 for every impurity ion.The amount of the Ni carrier is 5 mg.The standard deviation is 6.29 and the relative standard deviation is 15.9%.The detection limit of the method is 1.38 Bq/g.The method has been applied to the retired samples of the reactor.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2012年第B09期153-157,共5页
Atomic Energy Science and Technology
关键词
铝合金
化学回收率
去污因子
测量效率
标准偏差
检出限
aluminium alloy
chemical yield
decontamination factor
measure efficiency
standard deviation
detection limit
