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低本底液闪中子探测器的材料测试研究

李学洋 杜强 刘书魁 林兴德 幸浩洋 唐昌建 朱敬军

李学洋, 杜强, 刘书魁, 林兴德, 幸浩洋, 唐昌建, 朱敬军. 低本底液闪中子探测器的材料测试研究[J]. 原子核物理评论, 2017, 34(3): 604-610. doi: 10.11804/NuclPhysRev.34.03.604
引用本文: 李学洋, 杜强, 刘书魁, 林兴德, 幸浩洋, 唐昌建, 朱敬军. 低本底液闪中子探测器的材料测试研究[J]. 原子核物理评论, 2017, 34(3): 604-610. doi: 10.11804/NuclPhysRev.34.03.604
LI Xueyang, DU Qiang, LIU Shukui, LIN Xingde, XING Haoyang, TANG Changjian, ZHU Jingjun. Study of Material used in Liquid Scintillator Detector with Low Background[J]. Nuclear Physics Review, 2017, 34(3): 604-610. doi: 10.11804/NuclPhysRev.34.03.604
Citation: LI Xueyang, DU Qiang, LIU Shukui, LIN Xingde, XING Haoyang, TANG Changjian, ZHU Jingjun. Study of Material used in Liquid Scintillator Detector with Low Background[J]. Nuclear Physics Review, 2017, 34(3): 604-610. doi: 10.11804/NuclPhysRev.34.03.604

低本底液闪中子探测器的材料测试研究

doi: 10.11804/NuclPhysRev.34.03.604
基金项目: 国家自然科学基金资助项目(11055002,11275134,11475117);清华大学粒子技术与辐射成像教育部重点实验室开放基金资助项目(20151202)
详细信息
    作者简介:

    李学洋(1990-),男,湖北潜江人,学生,硕士研究生,核能与核技术工程;E-mail:454926895@qq.com

    通讯作者: 朱敬军,E-mail:zhujingjun@scu.edu.cn
  • 中图分类号: TL812

Study of Material used in Liquid Scintillator Detector with Low Background

Funds: National Natural Science Foundation of China(11055002, 11275134, 11475117); Key Laboratory of Particle and Radiation Imaging of Ministry of Education Open Foundation of Tsinghua University(20151202)
More Information
    Corresponding author: 10.11804/NuclPhysRev.34.03.604
  • 摘要: 为测量中国锦屏地下实验室(China JinPing underground Laboratory,CJPL)极低通量的中子本底,需要建造大型快中子液体闪烁体探测器。建造探测器需要选用低放射性本底材料,并且化学性质稳定,不与液体闪烁体发生反应而影响液体闪烁体(EJ-335)的性能。为此,建造了小型液闪探测器,在其中分别放入聚四氟乙烯、无氧铜、氟橡胶、全氟醚橡胶这4种材料进行长期浸泡,并分别进行了如下测试:液闪长时间浸泡各种材料前后液闪的吸收光谱测试;用60Co γ源检测小型液闪探测器光产额随时间的变化情况;用Am-Be中子源检验探测器在浸泡前后的n-γ甄别性能。最终实验结果表明,聚四氟乙烯和全氟醚这2种材料与液闪有很好的兼容性,可作为大型快中子液闪探测器的容器和密封圈的备选材料。


    In order to measure the flux and spectrum of neutron background which is extremely low in China JinPing underground Laboratory (CJPL), liquid scintillator detector with large scale used to detect fast neutron need to be fabricated. Surrounding materials used in detector require the excellent performance, such as low radioactivity as well as stable chemical properties, which do not react with liquid scintillator, so as to avoid affecting the performance of detector. Polytetrafluoroethylene(PTFE), highly purified no-oxygen copper, fluororubber and perfluoroelastomer had been put in a small detector and soaked for a long time. The change of absorption spectrum and light yield along with time as well as the performance of n-γ discrimination after soaked were tested. The results show that PTFE and Perfluoroelastomer are compatible with liquid scintillator, which offers a reference for the selection of material used in container and seal of liquid scintillator detector used to detect fast neutron.
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    [2] DAMA实验室网站. http://people.roma2.infn.it/~dama/web/home.html.
    [3] AKERIB D S, ARMEL-FUNKHOUSER M S, ATTISHA M J, et al. Phys Rev D, 2005, 72:052009.
    [4] AALSETH C E.[The CoGeNT Collaboration], arXiv:1002. 4703[astro-ph.CO].
    [5] LUX实验室网址. http://luxdarkmatter.org/
    [6] ANGLOHER G. Commissioning Run of the CRESST-Ⅱ Dark Matter Search. arXiv:0809.1829v2.
    [7] XMASS实验室网站. http://www-sk.icrr.u-tokyo.ac.jp/xmass/index-e.html.
    [8] KANG K J, CHENG J P, CHEN Y H, et al. Journal of Physics:Conference Series, 2010, 203:012028
    [9] KANG Kejun, CHENG Jianping, LI Jin, et al. Frontiers of Physics, 2013, 8(4):412.
    [10] 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.
    [11] XING Haoyang, WANG Li, ZHU Jingjun, et al. Chinese Physics C, 2013, 37(2):49.
    [12] Http://www.eljentechnology.com/index.php/products/liquidscintillators/ej-331-ej-335
    [13] ZHANG Caixun, LIN Xingde, ZHAO Jianlin, et al. Chinese Physics C, 2015, 14(8):34.
    [14] DING Yayun. Study on Gadolinium-doped Liquid Scinitillator fo Daya Bay Reactor Anti-neutrino Experiment[D]. Beijing:Institute of High Energy Physics, Chinese Academy of Sciences, 2009:81. (in Chinese) (丁雅韵. 大亚湾反应堆中微子实验掺钆液体闪烁体的研制[D]. 北京:中国科学院高能物理研究所, 2009:81.)
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出版历程
  • 收稿日期:  2016-12-01
  • 修回日期:  2017-03-20
  • 刊出日期:  2017-07-18

低本底液闪中子探测器的材料测试研究

doi: 10.11804/NuclPhysRev.34.03.604
    基金项目:  国家自然科学基金资助项目(11055002,11275134,11475117);清华大学粒子技术与辐射成像教育部重点实验室开放基金资助项目(20151202)
    作者简介:

    李学洋(1990-),男,湖北潜江人,学生,硕士研究生,核能与核技术工程;E-mail:454926895@qq.com

    通讯作者: 朱敬军,E-mail:zhujingjun@scu.edu.cn
  • 中图分类号: TL812

摘要: 为测量中国锦屏地下实验室(China JinPing underground Laboratory,CJPL)极低通量的中子本底,需要建造大型快中子液体闪烁体探测器。建造探测器需要选用低放射性本底材料,并且化学性质稳定,不与液体闪烁体发生反应而影响液体闪烁体(EJ-335)的性能。为此,建造了小型液闪探测器,在其中分别放入聚四氟乙烯、无氧铜、氟橡胶、全氟醚橡胶这4种材料进行长期浸泡,并分别进行了如下测试:液闪长时间浸泡各种材料前后液闪的吸收光谱测试;用60Co γ源检测小型液闪探测器光产额随时间的变化情况;用Am-Be中子源检验探测器在浸泡前后的n-γ甄别性能。最终实验结果表明,聚四氟乙烯和全氟醚这2种材料与液闪有很好的兼容性,可作为大型快中子液闪探测器的容器和密封圈的备选材料。


In order to measure the flux and spectrum of neutron background which is extremely low in China JinPing underground Laboratory (CJPL), liquid scintillator detector with large scale used to detect fast neutron need to be fabricated. Surrounding materials used in detector require the excellent performance, such as low radioactivity as well as stable chemical properties, which do not react with liquid scintillator, so as to avoid affecting the performance of detector. Polytetrafluoroethylene(PTFE), highly purified no-oxygen copper, fluororubber and perfluoroelastomer had been put in a small detector and soaked for a long time. The change of absorption spectrum and light yield along with time as well as the performance of n-γ discrimination after soaked were tested. The results show that PTFE and Perfluoroelastomer are compatible with liquid scintillator, which offers a reference for the selection of material used in container and seal of liquid scintillator detector used to detect fast neutron.

English Abstract

李学洋, 杜强, 刘书魁, 林兴德, 幸浩洋, 唐昌建, 朱敬军. 低本底液闪中子探测器的材料测试研究[J]. 原子核物理评论, 2017, 34(3): 604-610. doi: 10.11804/NuclPhysRev.34.03.604
引用本文: 李学洋, 杜强, 刘书魁, 林兴德, 幸浩洋, 唐昌建, 朱敬军. 低本底液闪中子探测器的材料测试研究[J]. 原子核物理评论, 2017, 34(3): 604-610. doi: 10.11804/NuclPhysRev.34.03.604
LI Xueyang, DU Qiang, LIU Shukui, LIN Xingde, XING Haoyang, TANG Changjian, ZHU Jingjun. Study of Material used in Liquid Scintillator Detector with Low Background[J]. Nuclear Physics Review, 2017, 34(3): 604-610. doi: 10.11804/NuclPhysRev.34.03.604
Citation: LI Xueyang, DU Qiang, LIU Shukui, LIN Xingde, XING Haoyang, TANG Changjian, ZHU Jingjun. Study of Material used in Liquid Scintillator Detector with Low Background[J]. Nuclear Physics Review, 2017, 34(3): 604-610. doi: 10.11804/NuclPhysRev.34.03.604
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