Simulation of background reduction and Compton suppression in a low-background HPGe spectrometer at a surface laboratory
文献类型：期刊论文
| 作者 | Niu SL(牛顺利); Cai X(蔡啸); Wu ZZ(吴振忠); Liu Y(刘义); Xie YG(谢宇广); Yu BX(俞伯祥); Wang ZG(王志刚); Fang J(方建); Sun XL(孙希磊); Sun LJ(孙丽君) |
| 刊名 | CHINESE PHYSICS C
 |
| 出版日期 | 2015 |
| 卷号 | 39期号:8页码:86002 |
| 关键词 | HPGe Geant4 simulation gamma background anti-compton ratio |
| 通讯作者 | 牛顺利 ; 蔡啸 |
| 英文摘要 | High-purity germanium (HPGe) detectors are well suited to analyse the radioactivity of samples. In order to reduce the environmental background for an ultra-low background HPGe spectrometer, low-activity lead and oxygen free copper are installed outside the probe to shield from gamma radiation, with an outer plastic scintillator to veto cosmic rays, and an anti-Compton detector to improve the peak-to-Compton ratio. Using Geant4 tools and taking into account a detailed description of the detector, we optimize the sizes of these detectors to reach the design requirements. A set of experimental data from an existing HPGe spectrometer was used to compare with the simulation. For the future low-background HPGe detector simulation, considering different thicknesses of BGO crystals and anti-coincidence efficiency, the simulation results show that the optimal BGO thickness is 5.5 cm, and the peak-to-Compton ratio of (40).K is raised to 1000 when the anti-coincidence efficiency is 0.85. In the background simulation, 15 cm oxygen-free copper plus 10 cm lead can reduce the environmental gamma rays to 0.0024 cps/100 cm(3) Ge (50 keV-2.8 MeV), which is about 10(-5) of the environmental background. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Nuclear ; Physics, Particles & Fields |
| 收录类别 | SCI ; CA |
| WOS记录号 | WOS:000358975300011 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/228682]  |
| 专题 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Niu SL,Cai X,Wu ZZ,et al. Simulation of background reduction and Compton suppression in a low-background HPGe spectrometer at a surface laboratory[J]. CHINESE PHYSICS C,2015,39(8):86002. |
| APA | 牛顺利.,蔡啸.,吴振忠.,刘义.,谢宇广.,...&Hu, T.(2015).Simulation of background reduction and Compton suppression in a low-background HPGe spectrometer at a surface laboratory.CHINESE PHYSICS C,39(8),86002. |
| MLA | 牛顺利,et al."Simulation of background reduction and Compton suppression in a low-background HPGe spectrometer at a surface laboratory".CHINESE PHYSICS C 39.8(2015):86002. |
入库方式： OAI收割
来源：高能物理研究所
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