^(152)Eu标准溶液的研制  

Preparation of Standard Radioactive Solution of ^(152)Eu

作　　者：杨巧玲[1] 姚顺和[1] 汪建清[1] 陈细林[1] 郭晓清[1] 姚艳玲[1] 

机构地区：[1]中国原子能科学研究院国防科工委放射性计量一级站,北京102413

出　　处：《核化学与放射化学》2012年第4期223-228,共6页Journal of Nuclear and Radiochemistry

摘　　要：为了保证HPGeγ谱仪的能量校准和效率刻度的准确性,研制152 Eu标准溶液十分必要。在本工作中,152 Eu标准溶液的研制包括:152 Eu原始溶液的获取及核纯度鉴定;标准溶液的配制及其放置陈化和分装;标准溶液均匀性和稳定性检验及其比活度定值等主要步骤。按取样规则取样品数,最小取样量为10～40mg溶液。用4πβ(PPC)-γ法进行比活度测定,测量数据经方差分析法检验,证明标准溶液是均匀的。存放1a后,再经测量和检查,证明标准溶液是稳定的。采用4πβ(PPC)-γ符合测量方法定值及8家实验室比对定值2种定值方式对所研制的152 Eu标准溶液的比活度进行定值。通过比活度比对定值验证了本实验室绝对测量方法4πβ(PPC)-γ符合法的可靠性,同时又实现了152 Eu标准溶液比活度量值的传递和统一。最终的定值结果为4家实验室采用6种绝对测量方法测量的比对测量结果,即152 Eu放射性标准溶液的比活度为499.1(1±0.5%)kBq/g(α=0.05,参考时刻2007-04-01-零时)。^152Eu is an important radionuclide for the energy and efficiency calibration of the HPGe gamma-detector. The preparation procedure is as following： purification and identify for purity of ^152 Eu, homogeneity test, stability test, and measurement. According to the sta- tistical tools, the spot-check samples from the solution in ampoule are measured for homoge- neity test by πβ（PPC）-γ. The minimum sample for spot-check foe measurement by πβ（PPC）-γ is about 10-40 mg solution. The solution in ampoule have been stored for one year, then the spot-check samples are measured for stability test by πβ（PPC）-γ, the results prove that the solutions are stable. The certified value was measured by different laboratories using different ways. The last result of lS2Eu is 499.1（1-1-0.5%） kBq/g（a=0.05）.

关 键 词：152Eu放射性标准溶液 测量 放射性活度 

分 类 号：O615.13[理学—无机化学]