Simulation of background reduction and Compton suppression in a low-background HPGe spectrometer at a surface laboratory

NIU Shun-Li; CAI Xiao; WU Zhen-Zhong; LIU Yi; XIE Yu-Guang; YU Bo-Xiang; WANG Zhi-Gang; FANG Jian; SUN Xi-Lei; SUN Li-Jun; LIU Ying-Biao; GAO Long; ZHANG Xuan; ZHAO Hang; ZHOU Li; HU Tao

doi:10.1088/1674-1137/39/8/086002

Chinese Physics C> 2015, Vol. 39> Issue(8) : 086002 DOI: 10.1088/1674-1137/39/8/086002

Simulation of background reduction and Compton suppression in a low-background HPGe spectrometer at a surface laboratory

Abstract
HTML
Reference
Related

PDF

Abstract：
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 ⁴⁰K 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 cm³ Ge (50 keV--2.8 MeV), which is about 10^-5 of the environmental background.

References

[1]

McDonald R J, Smith A R, Hurleyet D L et al. Journal of Radioanalytical and Nuclear Chemistry, 1998, 234: 33[2] Hubert Ph. Nucl. Instrum. Methods A, 2007, 580:751[3] Agostinelli S, Allison J, Amako K et al. Nucl. Instrum. Methods A, 2003, 506:250[4] WANG Dian-Rong, WANG Xian-Pei, LI Cheng-Ze et al. Physica Energiae Fortis ET Physica Nuclearis, 1983, 7: 136[5] Second Experimental Group of the Institute of High Energy Physics. Physica Energiae Fortis ET Physica Nuclearis, 1983, 7: 401[6] Gordon M S, Goldhagen P, Rodbell K P et al. IEEE Transactions on Nuclear Science, 2004, 51: 3427[7] Obed R I, Ademola A K, Vascotto M et al. Journal of Environmental Radioactivity, 2011, 102: 1012[8] Antanasijevi#263; R, Ani#269;in I, Bikit I et al. Radiation Measurements, 1999, 31: 371[9] Udovi#269;i#263; V, Grabe#382; B, Dragi#263; A et al. Radiation Measurements, 2009, 44: 1009[10] QIN Chun-yan, WANG Na-Ping, XIAO Lei et al. Geophysical Geochemical Exploration, 2012, 36: 441-444[11] Stromswold D C. IEEE Transactions on Nuclear Science, 1981, 28: 290

[1]	Cui-Bai Luo , Song Shi , Yong-Hui Xia , Hong-Shi Zong . Dynamical chiral symmetry breaking in NJL Model with a strong background magnetic field and Lorentz-violating extension of the Standard Model. Chinese Physics C, 2017, 41(6): 063104. doi: 10.1088/1674-1137/41/6/063104
[2]	Zhe Chang , Chao-Guang Huang , Zhi-Chao Zhao . Motion of photons in a gravitational wave background. Chinese Physics C, 2017, 41(9): 093108. doi: 10.1088/1674-1137/41/9/093108
[3]	Teng Yue , Qing-Lei Xiu , Yi-Wei Wang , Zhe Duan , Qing Qin . Physics design of collimators to reduce lost particle background at the CEPC. Chinese Physics C, 2016, 40(11): 117001. doi: 10.1088/1674-1137/40/11/117001
[4]	WANG Pan-Feng , DING Ya-Dong , WANG Qing-Bin , MA Zhong-Jian , GUO Si-Ming , LI Guan-Jia . Simulation of the response functions of an extended rangeneutron multisphere spectrometer using FLUKA. Chinese Physics C, 2015, 39(7): 076001. doi: 10.1088/1674-1137/39/7/076001
[5]	SU Jian , ZENG Zhi , MA Hao , YUE Qian , CHENG Jian-Ping , CHANG Jian-Ping , CHEN Nan , CHEN Ning , CHEN Qing-Hao , CHEN Yun-Hua , CHUANG Yo-Chun , DENG Zhi , DU Qiang , GONG Hui , HAO Xi-Qing , HE Qing-Ju , HUANG Han-Xiong , HUANG Teng-Rui , JIANG Hao , KANG Ke-Jun , LI Hau-Bin , et al . Study of the material photon and electron background and the liquid argon detector veto efficiency of the CDEX-10 experiment. Chinese Physics C, 2015, 39(3): 036001. doi: 10.1088/1674-1137/39/3/036001
[6]	Ziaur Rahman , Sikander M , Waheed Arshed , Nasir M , Waheed Ahmed . Influence of thyroid volume reduction on absorbed dose in ¹³¹I therapy studied by using Geant4 Monte Carlo simulation. Chinese Physics C, 2014, 38(5): 056201. doi: 10.1088/1674-1137/38/5/056201
[7]	ZHAO Jie , YU Ze-Yuan , LIU Jiang-Lai , LI Xiao-Bo , ZHANG Fei-Hong , XIA Dong-Mei . ¹³C(α, n)¹⁶O background in a liquid scintillator based neutrino experiment. Chinese Physics C, 2014, 38(11): 116201. doi: 10.1088/1674-1137/38/11/116201
[8]	SUN Yi , ZHANG Hao-Ran . One loop integrals reduction. Chinese Physics C, 2012, 36(11): 1055-1064. doi: 10.1088/1674-1137/36/11/004
[9]	LUO Wen , XU Wang , ZHUO Hong-Bin , MA Yan-Yun . Preliminary experimental study and simulation of an energy-tunable quasi-monochromatic laser-Compton X/γ-ray source. Chinese Physics C, 2012, 36(8): 769-776. doi: 10.1088/1674-1137/36/8/016
[10]	YAN Wei-Hua , ZHANG Li-Guo , ZHANG Zhao , XIAO Zhi-Gang . Conditioning the γ spectrometer for activity measurement at very high background. Chinese Physics C, 2012, 36(11): 1082-1088. doi: 10.1088/1674-1137/36/11/008
[11]	MO Xiao-Hu , ZHANG Jian-Yong , ZHANG Qing-Jiang , Achasov Mikhail , CAI Xiao , FU Cheng-Dong , Harris Fred , LIU Qian , Muchnoi Nikolay , QIN Qing , QU Hua-Min , WANG Yi-Fang , XU Jin-Qiang , ZHANG Tian-Bao . Study of radiation background at the north crossing point of the BEPCⅡ in collision mode. Chinese Physics C, 2011, 35(7): 642-655. doi: 10.1088/1674-1137/35/7/009
[12]	SONG Yu-Shou , Margaryan A , HU Bi-Tao , TANG Li-Guang . Performance of the low pressure MWPCs for fission fragments under a high background. Chinese Physics C, 2011, 35(8): 758-762. doi: 10.1088/1674-1137/35/8/011
[13]	LI Shu-Wei , KANG Ke-Jun , WANG Yi , LI Jin , LI Yuan-Jing , ZHANG Qing-Jun . Employing a Cerenkov detector for the thickness measurement of X-rays in a scattering background. Chinese Physics C, 2010, 34(12): 1895-1899.
[14]	WANG Wen-Xin , ZHANG Yi , WANG Ji-Jin , HU Bi-Tao . Study on spatial resolution of micromegas as a neutron detector under condition of high neutron flux and γ ray background. Chinese Physics C, 2009, 33(2): 110-113. doi: 10.1088/1674-1137/33/2/007
[15]	GONG Hui , LI Jin , GONG Guang-Hua , LI Yu-Xiong , HOU Lei , SHAO Bei-Bei . Online measurement of the BEPCⅡ background using RadFET dosimeters. Chinese Physics C, 2009, 33(9): 774-776. doi: 10.1088/1674-1137/33/9/012
[16]	AN Zhu , LIU Man-Tian , ZHU Jing-Jun . Study of the background in the experiments of inner-shell ionization of atoms by positron impact. Chinese Physics C, 2008, 32(S2): 270-273.
[17]	YUE Qian , CHENG Jian-Ping , LI Yuan-Jing , LI Jin , WANG Zi-Jing . Detection of WIMPs Using Low Threshold HPGe Detector. Chinese Physics C, 2004, 28(8): 877-880.
[18]	Zhang Tianbao , Wang Shuying , Wang Haidong , Shen Zhiqi , Meng Bonian . Precise Measurement of Gamma Ray Energies with HPGe Spectrometer by Slithering Comparison Method. Chinese Physics C, 1993, 17(S1): 25-31.
[19]	Qiu Jinfa . The Background Darkness of X-Ray Films and Energy Calibration in an EC Experiment. Chinese Physics C, 1989, 13(S4): 363-370.
[20]	Zhang Guangyuan , Cai Weicheng , Li Xinzhou . Fermion Fields in Soliton Background of Six-dimensional Pure Kaiuza-Klein Theories. Chinese Physics C, 1988, 12(S2): 159-164.

Access

Get Citation

NIU Shun-Li, CAI Xiao, WU Zhen-Zhong, LIU Yi, XIE Yu-Guang, YU Bo-Xiang, WANG Zhi-Gang, FANG Jian, SUN Xi-Lei, SUN Li-Jun, LIU Ying-Biao, GAO Long, ZHANG Xuan, ZHAO Hang, ZHOU Li, HU Tao and Simulation of background reduction and Compton suppression in a low-background HPGe spectrometer at a surface laboratory[J]. Chinese Physics C, 2015, 39(8): 086002. doi: 10.1088/1674-1137/39/8/086002

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2014-10-20
Revised: 2015-03-17

Article Metric

Article Views(1666)
PDF Downloads(231)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Simulation of background reduction and Compton suppression in a low-background HPGe spectrometer at a surface laboratory

Corresponding author: NIU Shun-Li,

Corresponding author: CAI Xiao,

Received Date: 2014-10-20

Accepted Date: 2015-03-17

Available Online: 2015-08-15

Abstract: 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 ⁴⁰K 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 cm³ Ge (50 keV--2.8 MeV), which is about 10^-5 of the environmental background.

HTML

Reference (1)

Simulation of background reduction and Compton suppression in a low-background HPGe spectrometer at a surface laboratory

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article