| 液闪TDCR测量装置研制 |
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| 引用本文： | 吕晓侠,陈细林,姚顺和.液闪TDCR测量装置研制[J].原子能科学技术,2014,48(11):2133-2136. |
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| 作者姓名： | 吕晓侠 陈细林 姚顺和 |
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| 作者单位： | 中国原子能科学研究院 计量测试部，北京102413 |
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| 基金项目： | 国防军工计量十一五科研计划项目资助 |
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| 摘 要： | 介绍了新建液闪活度绝对测量装置，该装置应用液闪三管两管符合比（TDCR）测量原理对β放射性核素活度进行测量。装置由3个光电倍增管及自制的散焦分压线路组成。通过改变光电倍增管的聚焦来改变探测效率，测量了3H放射源活度并进行了不确定度分析及讨论，TDCR测量结果与标定值在0.9%内符合，合成标准不确定度为0.6%（k=1）。
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| 关 键 词： | 液闪 活度 不确定度 |
Development of TDCR Liquid Scintillation System |
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| LV Xiao-xia,CHEN Xi-lin,YAO Shun-he.Development of TDCR Liquid Scintillation System[J].Atomic Energy Science and Technology,2014,48(11):2133-2136. |
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| Authors: | LV Xiao-xia CHEN Xi-lin YAO Shun-he |
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| Affiliation: | China Institute of Atomic Energy, P. O. Box 275-20, Beijing 102413, China |
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| Abstract: | The liquid scintillation counting system recently constructed for absolute activity measurement was introduced, and it uses TDCR method to measure activity of β nuclide. The system is equipped with three PMTs connected to a de-focusing voltage divider base developed by ourselves. After varying the efficiency by de-focusing of the PM tube, the activity of the 3H source was determined. The analysis of uncertainty and discussion of measurement result were given. The activity determined with TDCR is in agreement with certified value within the range of 0.9%. The combined uncertainty of results is 0.6% (k=1). |
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| Keywords: | liquid scintillation activity uncertainty |
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