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用反符合方法测量131I和133Ba的比活度
引用本文:汪建清,姚顺和,杨丽艳,杨巧玲,贾雪文,姚燕玲. 用反符合方法测量131I和133Ba的比活度[J]. 原子能科学技术, 2008, 42(3): 211-217. DOI: 10.7538/yzk.2008.42.03.0211
作者姓名:汪建清  姚顺和  杨丽艳  杨巧玲  贾雪文  姚燕玲
作者单位:1.中国原子能科学研究院 ;计量测试部,北京 ;102413; ;2.四川大学,四川 ;成都 ;610064 ;
摘    要:131I是核医学应用中较为重要的核素之一;133Ba是1种电子俘获核素,对HPGeγ谱仪能量刻度和效率校准具有重要意义。利用4πβ(PPC)-γ(HPGe)反符合测量装置对上述两种核素的活度进行了反符合测量方法研究,所得到的比活度测量结果分别为1794.8(1±0.6%)kBq•g-1(k=1)和502.8•(1±0.6%)kBq•g-1(k=1),与归一到相同参考时刻4πβ(PC)-γ(NaI(Tl))符合效率外推法的测量结果1797.6(1±0.5%)kBq•g-1(k=1)和504.9(1±0.6%)kBq•g-1(k=1)均在不确定度范围内一致。

关 键 词:4πβ(PPC)-γ反符合   4πβ-γ符合   比活度
文章编号:1000-6931(2008)03-0211-07
收稿时间:2007-06-15
修稿时间:2007-06-15

Specific Activity Measurement of 131I and 133Ba by Anti-coincidence Method
WANG Jian-qing,YAO Shun-he,YANG Li-yan,YANG Qiao-ling,JIA Xue-wen,YAO Yan-ling. Specific Activity Measurement of 131I and 133Ba by Anti-coincidence Method[J]. Atomic Energy Science and Technology, 2008, 42(3): 211-217. DOI: 10.7538/yzk.2008.42.03.0211
Authors:WANG Jian-qing  YAO Shun-he  YANG Li-yan  YANG Qiao-ling  JIA Xue-wen  YAO Yan-ling
Affiliation:1.China Institute of Atomic Energy, P.O.Box 275-20, Beijing 102413, China; ;2.Sichuan University, Chengdu 610064, China ;
Abstract:131I is a very important nuclide applied in nuclear medicine. 133Ba, an EC decay nuclide, plays a significant role in the efficiency calibration of HPGe detector. The activity measurement method for the above two kinds of nuclides was studied by the 4πβ(PPC)-γ(HPGe) anti-coincidence counting. The specific activity measurement result for 131I sample is 1 794.8(1±0.6%)kBq•g-1(k=1)and for 133Ba is 502.8(1±0.6%)kBq•g-1(k=1). Compared with the results measured by 4πβ(PC)-γ(NaI(Tl)) coincidence efficiency extrapolation methods at the same reference time, 1 797.6(1±0.5%)kBq•g-1(k=1)and 504.9(1±0.6%)kBq•g-1(k=1), it is in good agreement within the uncertainties.
Keywords:4πβ(PPC)-γ anti-coincidence  4πβ-γ coincidence  specific activity
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