摘要
建立了液体闪烁计数法测定天然铀样品中铀含量的分析方法。对影响液闪测量的主要因素,如α/β甄别、淬灭效率等进行了研究,确定了最佳脉冲甄别参数值和淬灭校正曲线。与铀的容量法进行了方法比对,结果吻合较好。方法的精密度良好,对浓度为0.985 7mg/g的铀标准溶液平行测定7次,相对标准偏差为1.9%。该法易于操作、分析速度快,可用于核燃料循环前段天然铀样品中铀的分析测定。
A new analytical procedure based on liquid scintillation counting （LSC） was developed for the determination of uranium in natural uranium samples. Factors possibly influencing the measurements of LSC were studied, such as α/β discrimination, quenching efficiency, and the optimum conditions for LSC were obtained, including pulse shape analysis （PSA） parameter and quenching correction curve. The results agree very well with the experimental results by volumetry. The precision and stability are fine with the Sr of 1. 9 for 0. 985 7 mg/g U（n=7）. It is shown that LSC is an easy, efficient and accurate method capable of estimating uranium concentrations of various natural uranium samples in front-end of nuclear fuel cycle industry.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
2013年第2期112-115,共4页
Journal of Nuclear and Radiochemistry
关键词
液体闪烁计数法
天然铀
测定
liquid scintillation counting
natural uranium
determination
