| 低本底反康普顿高纯锗γ谱仪 |
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| 引用本文： | 苏琼,钟志垗,高亚民,罗素明,郭瑞琪. 低本底反康普顿高纯锗γ谱仪[J]. 核电子学与探测技术, 1988, 0(5) |
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| 作者姓名： | 苏琼 钟志垗 高亚民 罗素明 郭瑞琪 |
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| 作者单位： | 卫生部工业卫生实验所 北京(苏琼，钟志垗，高亚民，罗素明)，卫生部工业卫生实验所 北京(郭瑞琪) |
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| 摘 要： | 本文介绍的谱仪采用铅-石蜡-铅为主的复合物质屏蔽。HPGe探测器对~(60)Co的1332keV γ射线的相对效率为25％,能量分辨率好于1.75keV。在阱型反符合屏蔽下,系统对放在HPGe端面的~(137)Cs点状薄膜源的峰康比可达800:1;测量时间1000min,置信度95％时,对~(137)Cs点源探测灵敏度好于5.6mBq;谱议在100—2000keV能区内的积分本底好于8.7±0.1次/min,与无反符合屏蔽时相比,压缩倍数为6.6。
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| 关 键 词： | 低本底 宇宙射线 锗探测器 反符合屏蔽 康普顿抑制 γ谱仪 |
Anti-Compton HPGe Gamma-ray Spectrometer with an Ultra-low Background |
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| Su Qiong Zhong Zhizhao Gao Yamin Luo Suming Guo Reiqi. Anti-Compton HPGe Gamma-ray Spectrometer with an Ultra-low Background[J]. Nuclear Electronics & Detection Technology, 1988, 0(5) |
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| Authors: | Su Qiong Zhong Zhizhao Gao Yamin Luo Suming Guo Reiqi |
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| Abstract: | The paper describes the development of a compton suppression HPGe gamma-spectrometer with plastic scintillators and with NaI(T1) as anti-coincidence shield detectors. The HPGe detector has an efficiency of 25% for 1332 keV of 60Co, relative to 3 by 3 inch NaI(T1), and a resolution of 1.75 keV for gamma ray. In the well-type anticoincidence shielding model, its peak to compton ratio is 800:1 and the detection sensitivity is 5.6 mBq for 187Cs point source. The integral background is 8.7 cpm in the energy range 100to 2000keV |
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| Keywords: | Low background Cosmic ray Ge detector Anticoincidence shield Compton suppre-ssion Gamma spectrometer |
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