arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1102.2727physics.ins-detastro-ph.COastro-ph.IMhep-ex
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用于暗物质研究的CsI(Na)晶体的中子-γ鉴别

Neutron-gamma discrimination of CsI(Na) crystals for dark matter searches

Xilei Sun, Junguang Lu, Tao Hu, Li Zhou, Jun Cao, Yifang Wang, Liang Zhan, Boxiang Yu, Xiao Cai, Jian Fang, Yuguang Xie, Zhenghua An, Zhigang Wang, Zhen Xue, Qi… 展开作者

Xilei Sun, Junguang Lu, Tao Hu, Li Zhou, Jun Cao, Yifang Wang, Liang Zhan, Boxiang Yu, Xiao Cai, Jian Fang, Yuguang Xie, Zhenghua An, Zhigang Wang, Zhen Xue, Qiwen Lu, Feipeng Ning, Yongshuai Ge, Yingbiao Liu

摘要:

本文研究了CsI(Na)晶体的发光特性。利用采样频率为5GS/s的TDS 3054 C示波器,我们发现核反冲信号主要是衰减时间约为20 ns的超快光脉冲,而γ射线信号的衰减时间约为600 ns。核反冲和γ射线信号的波长也不同。对n/γ分离的研究表明,当电子反冲能量大于20 keV时,抑制因子可达10-7数量级,信号效率大于80%。这样的性质使得CsI(Na)成为寻找暗物质的理想候选者。

英文摘要:

The luminescent properties of CsI(Na) crystals are studied in this report. By using a TDS3054C oscilloscope with a sampling frequency of 5 GS/s, we find out that nuclear recoil signals are dominated by very fast light pulse with a decay time of ~20 ns, while γ-ray signals have a decay time of ~600 ns. The wavelength of nuclear recoil and γ-ray signals are also different. The study of n/γ separation shows that the rejection factor can reach an order of 10-7 with signal efficiency more than 80% at an equivalent electron recoil energy of 20 keV or more. Such a property makes CsI(Na) an ideal candidate for dark matter searches.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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