| ~(133)Ba面源效率转移法刻度~(133)Xe气体源HPGe探测效率 |
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| 引用本文： | 田自宁,欧阳晓平,刘洋,张小东,刘林月,张建福,刘军,阮金陆,张忠兵,曾鸣.~(133)Ba面源效率转移法刻度~(133)Xe气体源HPGe探测效率[J].强激光与粒子束,2014,26(9):094005. |
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| 作者姓名： | 田自宁 欧阳晓平 刘洋 张小东 刘林月 张建福 刘军 阮金陆 张忠兵 曾鸣 |
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| 作者单位： | 1.清华大学 工程物理系, 粒子技术与辐射成像教育部重点实验室, 北京 1 00084; |
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| 基金项目： | 国家自然科学基金项目(11275154,11105106,11275150,11175142) |
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| 摘 要： | 提出使用面源进行效率转移法刻度133 Xe气体体源的探测效率。使用133 Ba面源模拟刻度放射性133 Xe气体体源的探测效率,在刻度的过程中利用137 Cs与133Ba的峰效率比值及133 Ba面源远端无符合相加效应,137 Cs能峰远近都无符合相加效应等,结合软件模拟建立远近距离峰效率比值的关系,来解决133 Ba的符合相加效应。最后,使用面源效率转移法进行气体体源效率刻度,转移法刻度结果和面源模拟法刻度计算值的偏差在±1%以内。
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| 关 键 词： | 面源 LabSOCS 效率刻度 |
| 收稿时间： | 2014/3/19 |
Efficiency calibration technology of 133Xe gas by efficiency transfer code of 133Ba disk source for HPGe detector |
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| Affiliation: | 1.Key Laboratory of Particle and Radiation Imaging of Ministry of Education,Department of Engineering Physics,Tsinghua University,Beijing 100084,China;2.Northwest Institute of Nuclear Technology,Xi’an 710024,China;3.School of Nuclear Science and Engineering,North China Electric Power University,Beijing 102206,China |
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| Abstract: | An efficiency transfer code based on disk source is established to calibrate efficiency of 133Xe gas sample. 133Ba disk sources were used to simulate the detection efficiency of 133Xe cylindrical volume source. Relationships were established based on peak efficiency ratio between 137Cs and 133Ba. Cascade summing effects in close geometry gamma-ray spectrum of 133Ba was solved based on the ratios calculated by LabSOCS simulation and the experiment data of long and short distances. Finally, the efficiency transfer code is used to calibrate 133Xe gas samples efficiency. The detection efficiencies using the efficiency transfer code are consistent with the results of disk source simulation with discrepancy about 1％. |
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| Keywords: | disk source LabSOCS efficiency calibration |
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