首页|Measurement of muon-induced neutron yield at the China Jinping Underground Laboratory

Measurement of muon-induced neutron yield at the China Jinping Underground Laboratory

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Solar,terrestrial,and supernova neutrino experiments are subject to muon-induced radioactive back-ground.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±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±1.86stat.±0.76syst.)×10-4μ-1g-1cm2 at an average muon energy of 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±0.02)for the dependence of the neutron yield at the liquid scintillator on muon energy.

Underground laboratoryneutrino detectorcosmic-ray muonneutron yieldliquid scintillat-or

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、Aiqiang Zhang、Bin Zhang

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Department of Engineering Physics,Tsinghua University,Beijing 100084,China

Center for High Energy Physics,Tsinghua University,Beijing 100084,China

School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China

Institut für Physik,Technische Universit?t Berlin,Berlin 10623,Germany

Key Laboratory of Particle&Radiation Imaging(Tsinghua University),Ministry of Education,China

école Polytechnique Fédérale de Lausanne,Lausanne 1015,Switzerland

School of Physics,Sun Yat-Sen University,Guangzhou 510275,China

School of Physics,Nanjing University,Nanjing 210093,China

Brookhaven National Laboratory,Upton,New York 11973,USA

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国家自然科学基金国家自然科学基金国家自然科学基金Key Laboratory of Particle&Radiation Ima-ging(TsinghuaUniversity)CAS Center for Excellence in Particle Physics(CCEPP)Guangdong Basic and Applied Basic Research FoundationNational Laboratory is by the United States Department of Energy

1162010100411475093121278082019A1515012216DE-SC0012704

2022

10.1088/1674-1137/ac66cc

中国物理C(英文版)
中国物理学会　中国科学院高能物理研究所　中国科学院近代物理研究所

中国物理C(英文版)

CSTPCDCSCDSCI
影响因子：0.347
ISSN：1674-1137
年,卷(期)：2022.46(8)
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