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| 液闪TDCR活度测量装置的研制 | |
| 引用本文： | 吴永乐,梁珺成,刘浩然,柳加成,姚顺和,岳会国,刘森林,杨元第,袁大庆. 液闪TDCR活度测量装置的研制[J]. 计量学报, 2014, 35(1): 83-86. DOI: 10.3969/j.issn.1000-1158.2014.01.17 |
| 作者姓名： | 吴永乐 梁珺成 刘浩然 柳加成 姚顺和 岳会国 刘森林 杨元第 袁大庆 |
| 作者单位： | 1. 环保部核与辐射安全中心， 北京 100082； 2. 中国原子能科学研究院， 北京 102413； 3. 中国计量科学研究院， 北京 100013 |
| 摘 要： | 建立了基于效率计算的液闪三双符合比活度测量装置，通过设定甄别阈、扩展死时间、符合技术手段消除了光电倍增管的热噪声和余后脉冲的影响。该装置测量氚水、14C和99Tc的双管符合探测效率达到54%、96.2%和97.2%。用NIST氚水标准物质对新建立的实验装置进行验证，En数检验结果满意。 |
| 关 键 词： | 计量学 液闪计数器； 三双符合比方法； 活度测量 |
Construction and Implementation of a Liquid Scintillation TDCR System |
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| WU Yong-le,LIANG Jun-cheng,LIU Hao-ran,LIU Jia-cheng,YAO Shun-he,YUE Hui-guo,LIU Sen-lin,YANG Yuan-di,YUAN Da-qing. Construction and Implementation of a Liquid Scintillation TDCR System[J]. Acta Metrologica Sinica, 2014, 35(1): 83-86. DOI: 10.3969/j.issn.1000-1158.2014.01.17 | |
| Authors: | WU Yong-le LIANG Jun-cheng LIU Hao-ran LIU Jia-cheng YAO Shun-he YUE Hui-guo LIU Sen-lin YANG Yuan-di YUAN Da-qing |
| Affiliation: | 1. Nuclear and Radiation Safety Center, Beijing 100082, China; 2. China Institute of Atomic Energy,Beijing 102413, China; 3. National Institute of Metrology, Beijing 100013, China |
| Abstract: | The liquid scintillation triple-to-double coincidence ratio (TDCR) system recently constructed is presented. In order to eliminate the influence of after pluses and thermal noises, the technology of discrimination threshold setting, coincidence counting and extendible dead time is in application. The highest efficiency of tritium water, 14C and 99Tc is about 54%， 96.2% and 97.2% separately. The NIST SRM of tritium water is measured to verify the performance of the counter, and the result agreed well with certified activitiy value with En criterion. |
| Keywords: | Metrology Liquid scintillation counter； TDCR method； Activity measurement |
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