Stability test and efficiency calibration of a gadolinium-loaded liquid scintillation detector

doi:10.16511/j.cnki.qhdxxb.2017.25.035

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Abstract The China dark matter experiment (CDEX) collaboration has developed a large gadolinium-loaded liquid scintillation detector for neutron background measurements in the China JinPing underground laboratory (CJPL). Coincidence measurements of the recoil proton and neutron capture signals are used to suppress the gamma background. This paper presents stability tests and monoenergetic neutron detection efficiency calibration of the detector. The tests show that the detector photon yield is stable. The detector has good neutron and gamma pulse shape discrimination and a highly detection efficiency. Thus, this system is suitable for low intensity fast neutron measurements in the underground laboratory.

Keywords dark matter underground laboratory liquid scintillation detector fast neutron detection efficiency

ZTFLH:

O571.53

Issue Date: 15 July 2017

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	WANG Li
	DU Qiang
	KANG Kejun
	YUE Qian

Cite this article:

WANG Li,DU Qiang,KANG Kejun, et al. Stability test and efficiency calibration of a gadolinium-loaded liquid scintillation detector[J]. Journal of Tsinghua University(Science and Technology), 2017, 57(7): 768-773.

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http://jst.tsinghuajournals.com/EN/10.16511/j.cnki.qhdxxb.2017.25.035 OR http://jst.tsinghuajournals.com/EN/Y2017/V57/I7/768

[1]	KANG Kejun, CHENG Jianping, LI Jin, et al. Introduction to the CDEX experiment [J]. Frontiers of Physics, 2013, 8(4): 412-437.
[2]	YUE Qian, ZHAO Wei, KANG Kejun, et al. Limits on light weakly interacting massive particles from the CDEX-1 experiment with a p-type point-contact germanium detector at the China Jinping underground laboratory [J]. Physical Review D, 2014, 90(9), 091701.
[3]	Schonert S, Abt I, Altmann M, et al. The GERmanium Detector Array (GERDA) for the search of neutrinoless ββ decays of <sup>76</sup>Ge at LNGS [J]. Nuclear Physics B-Proceedings Supplements, 2005, 145: 242-245. url: http://dx.doi.org/10.1016/j.nuclphysbps.2005.04.014
[4]	Cleveland B T, Daily T, Davis R, et al. Measurement of the solar electron neutrino flux with the homestake chlorine detector [J]. Astrophysical Journal, 1998, 496(1): 505-526.
[5]	Chazal V, Brissot R, Cavaignac J F, et al. Neutron background measurements in the underground laboratory of Modane [J]. Astroparticle Physics, 1998, 9(2): 163-172.
[6]	Fisher B M, Abdurashitov J N, Coakley K J, et al. Fast neutron detection with <sup>6</sup>Li-loaded liquid scintillator [J]. Nuclear Instruments and Methods in Physics Research A, 2011, 646(1): 126-134.
[7]	Tziaferi E, Carson M J, Kudryavtsev V A, et al. First measurement of low intensity fast neutron background from rock at the Boulby underground laboratory [J]. Astroparticle Physics, 2007, 27(5): 326-338.
[8]	ZHAO Wei, YUE Qian, KANG Kejun, et al. First results on low-mass WIMPs from the CDEX-1 experiment at the China Jinping underground laboratory [J]. Physical Review D, 2013, 88(5), 052004.
[9]	ZHAO Wei, YUE Qian, KANG Kejun, et al. Search of low-mass WIMPs with a p-type point contact germanium detector in the CDEX-1 experiment [J]. Physical Review D, 2016, 93(9), 092003.
[10]	LIU Shukui, YUE Qian, KANG Kejun, et al. Limits on light WIMPs with a germanium detector at 177 MeVee threshold at the China Jinping underground laboratory [J]. Physical Review D, 2014, 90(3), 032003.
[11]	WU Yucheng, HAO Xiqing, YUE Qian, et al. Measurement of cosmic ray flux in the China JinPing underground laboratory [J]. Chinese Physics C, 2013, 37(8), 086001.
[12]	LI Lei, YUE Qian, TANG Changjian, et al. A Monte Carlo study for the shielding of γ backgrounds induced by radionuclides for CDEX [J]. Chinese Physics C, 2011, 35(3): 282-287.
[13]	苏建. CDEX探测器辐射本底模拟与实验研究 [D]. 北京: 清华大学, 2015. SU Jian. Simulation and Experiment Research on Radiation Background of CDEX Detectors [D]. Beijing: Tsinghua University, 2015. (in Chinese)
[14]	魏伟伟, 杜强, 王力, 等. 掺钆液闪中子探测器的研制 [J]. 强激光与粒子束, 2015, 27(6), 066001. WEI Weiwei, DU Qiang, WANG Li, et al. Manufacture of gadolinium-doped liquid scintillator detector [J]. High Power Laser and Particle Beams, 2015, 27(6), 066001. (in Chinese)

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