Simulation of background reduction and Compton suppression in a low-background HPGe spectrometer at a surface laboratory
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); Liu YB(刘颖彪); Gao L(高龙); Zhang X(张烜); Zhao H(赵航); Zhou L(周莉); Lv JG(吕军光); Hu T(胡涛); Niu, SL; Cai, X; Wu, ZZ; Liu, Y; Xie, YG; Yu, BX; Wang, ZG; Fang, J; Sun, XL; Sun, LJ; Liu, YB; Gao, L; Zhang, X; Zhao, H; Zhou, L; Lu, JG; Hu, T
刊名CHINESE PHYSICS C
2015
卷号39期号:8页码:86002
关键词HPGe Geant4 simulation gamma background anti-compton ratio
学科分类Physics
DOI10.1088/1674-1137/39/8/086002
通讯作者牛顺利 ; 蔡啸
文章类型Article
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.
类目[WOS]Physics, Nuclear ; Physics, Particles & Fields
收录类别SCI ; CA
WOS记录号WOS:000358975300011
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228682
专题中国科学院高能物理研究所_实验物理中心_期刊论文
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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.
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