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arXiv 2108.04010hep-ex
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中国锦屏地下实验室μ子感生中子产生的测量

Measurement of Muon-induced Neutron Production at the China Jinping Underground Laboratory

Lin Zhao, Wentai Luo, Lars Bathe Peters, Shaomin Chen, Mourad Chouaki, Wei Dou, Lei Guo, Ziyi Guo, Ghulam Hussain, Jinjing Li, Ye Liang, Qian Liu, Guang Luo, Mi… 展开作者

Lin Zhao, Wentai Luo, Lars Bathe Peters, Shaomin Chen, Mourad Chouaki, Wei Dou, Lei Guo, Ziyi Guo, Ghulam Hussain, Jinjing Li, Ye Liang, Qian Liu, Guang Luo, Ming Qi, Wenhui Shao, Jian Tang, Linyan Wan, Zhe Wang, Yiyang Wu, Benda Xu, Tong Xu, Weiran Xu, Yuzi Yang, Minfang Yeh, Bin Zhang

摘要:

太阳、地球和超新星中微子实验都受到μ子诱导的放射性背景的影响。中国锦屏地下实验室(CJPL)以其2400 m岩石覆盖和远离核电站的独特优势,是MeV级中微子实验的理想选择。利用锦屏中微子实验(JNE)的1吨级原型探测器,在CJPL-I一期820.28天的数据集中探测到343个高能宇宙线μ子和(7.86 $ \pm $ 3.97)个μ子感生中子。基于μ子感生中子,我们在液体闪烁体中测量了相应的μ子感生中子产额为$ (3.44 \pm 1.86_{\rm stat.}\pm 0.76_{\rm syst.})\times 10^{-4}μ^{-1}\rm g^{-1}cm^{2} $,μ子平均能量为\SI{340}{GeV}。我们提供了第一个研究这样的中子背景在CJPL。包括该测量的全局拟合示出了液体闪烁体处的中子产额对μ子能量的依赖性的幂律系数(0.75 $ \pm $ 0.02)。

英文摘要:

Solar, terrestrial, and supernova neutrino experiments are subject to muon-induced radioactive backgrounds. The China Jinping Underground Laboratory (CJPL), with its unique advantage of a 2400 m rock coverage and long distance from nuclear power plants, is ideal for MeV-scale neutrino experiments. Using a 1-ton prototype detector of the Jinping Neutrino Experiment (JNE), we detected 343 high-energy cosmic-ray muons and (7.86$ \pm $3.97) muon-induced neutrons from an 820.28-day dataset at the first phase of CJPL (CJPL-I). Based on the muon-induced neutrons, we measured the corresponding muon-induced neutron yield in a liquid scintillator to be $ (3.44 \pm 1.86_{\rm stat.}\pm 0.76_{\rm syst.})\times 10^{-4}μ^{-1}\rm g^{-1}cm^{2} $ at an average muon energy of \SI{340}{GeV}. We provided the first study for such neutron background at CJPL. A global fit including this measurement shows a power-law coefficient of (0.75$ \pm $0.02) for the dependence of the neutron yield at the liquid scintillator on muon energy.

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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