| k_0-NAA样品测量架位自动调节和半参量化效率计算 |
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| 引用本文： | 肖才锦,倪邦发,田伟之,王平生,刘存兄,张贵英,黄东辉,聂鹏,张海青,陈喆,秦亚丽.k_0-NAA样品测量架位自动调节和半参量化效率计算[J].原子能科学技术,2010,44(2):232-236. |
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| 作者姓名： | 肖才锦 倪邦发 田伟之 王平生 刘存兄 张贵英 黄东辉 聂鹏 张海青 陈喆 秦亚丽 |
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| 作者单位： | 中国原子能科学研究院 ;核物理研究所，北京102413 |
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| 摘 要： | 设计了中子活化自动换样和架位精密调节系统。实现了任意衰变纲图的γ发射核在源-探测器为0～280mm范围内不同测量位置的效率测定,提出了解决k0法不同测量几何的效率归一以及级联符合校正的半参量化方法。对于源与探测器距离较远的位置(符合效应可忽略),采用有效作用深度进行效率计算;对于源与探测器距离较近的位置(符合效应不能忽略),采用实验测得不同位置的效率比进行计算。
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| 关 键 词： | k0-NAA" target="_blank">k0-NAA')">k0-NAA 级联符合 有效作用深度 高纯锗探测器 |
Automatic and Accurate Sample Positioning in k0-NAA and Semi-parametric Efficiency Normalization for Different Counting Positions |
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| XIAO Cai-jin,NI Bang-fa,TIAN Wei-zhi,WANG Ping-sheng,LIU Cun-xiong,ZHANG Gui-ying,HUANG Dong-hui,NIE Peng,ZHANG Hai-qing,CHEN Zhe,QIN Ya-li.Automatic and Accurate Sample Positioning in k0-NAA and Semi-parametric Efficiency Normalization for Different Counting Positions[J].Atomic Energy Science and Technology,2010,44(2):232-236. |
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| Authors: | XIAO Cai-jin NI Bang-fa TIAN Wei-zhi WANG Ping-sheng LIU Cun-xiong ZHANG Gui-ying HUANG Dong-hui NIE Peng ZHANG Hai-qing CHEN Zhe QIN Ya-li |
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| Affiliation: | China Institute of Atomic Energy, P.O. Box 275-50, Beijing 102413, China |
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| Abstract: | An automatic sample changer and an accurate sample positioning system were developed for γ-spectrum measurements in general and k0-NAA in particular. Full energy peak efficiencies for radionuclides with arbitrary decay schemes were calibrated over 0-280 mm source-detector distances. A semi-parametric method was established for efficiency normalizations among different counting positions-parametric effective interactive depth method for efficiency normalizations of “far” (true coincidence effect negligible) counting positions, and experimentally determined “rack-ratio” of a given γ-ray from a given nuclide for that of “near” (true coincidence effect worth considering) counting positions. |
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| Keywords: | k0-NAA cascade effective interactive depth HPGe detector |
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