Low radioactive material screening and background control for the PandaX-4T experiment

被引:0
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作者
Zhicheng Qian
Lin Si
Abdusalam Abdukerim
Zihao Bo
Wei Chen
Xun Chen
Yunhua Chen
Chen Cheng
Yunshan Cheng
Xiangyi Cui
Yingjie Fan
Deqing Fang
Changbo Fu
Mengting Fu
Lisheng Geng
Karl Giboni
Linhui Gu
Xuyuan Guo
Ke Han
Changda He
Jinrong He
Di Huang
Yanlin Huang
Zhou Huang
Ruquan Hou
Xiangdong Ji
Yonglin Ju
Chenxiang Li
Mingchuan Li
Shu Li
Shuaijie Li
Qing Lin
Jianglai Liu
Xiaoying Lu
Lingyin Luo
Wenbo Ma
Yugang Ma
Yajun Mao
Yue Meng
Xuyang Ning
Ningchun Qi
Xiangxiang Ren
Nasir Shaheed
Changsong Shang
Guofang Shen
Wenliang Sun
Andi Tan
Yi Tao
Anqing Wang
Meng Wang
机构
[1] School of Physics and Astronomy,School of Physics
[2] Shanghai Jiao Tong University,Research Center for Particle Science and Technology, Institute of Frontier and Interdisciplinary Science
[3] Key Laboratory for Particle Astrophysics and Cosmology (MoE),Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education
[4] Shanghai Key Laboratory for Particle Physics and Cosmology,Tsung
[5] Shanghai Jiao Tong University Sichuan Research Institute,Dao Lee Institute
[6] Yalong River Hydropower Development Company,School of Physics
[7] Ltd.,Key Laboratory of Nuclear Physics and Ion
[8] Sun Yat-Sen University,beam Application (MOE), Institute of Modern Physics
[9] Shandong University,School of Physics
[10] Shandong University,School of Physics
[11] Shanghai Jiao Tong University,International Research Center for Nuclei and Particles in the Cosmos, & Beijing Key Laboratory of Advanced Nuclear Materials and Physics
[12] Nankai University,School of Medical Instrument and Food Engineering
[13] Fudan University,Department of Physics
[14] Peking University,School of Mechanical Engineering
[15] Beihang University,State Key Laboratory of Particle Detection and Electronics
[16] Beihang University,Department of Modern Physics
[17] University of Shanghai for Science and Technology,SJTU Paris Elite Institute of Technology
[18] University of Maryland,School of Physics and Microelectronics
[19] Shanghai Jiao Tong University,undefined
[20] University of Science and Technology of China,undefined
[21] University of Science and Technology of China,undefined
[22] Shanghai Jiao Tong University,undefined
[23] Zhengzhou University,undefined
关键词
Dark Matter and Double Beta Decay (experiments); Rare Decay;
D O I
暂无
中图分类号
学科分类号
摘要
PandaX-4T is a ton-scale dark matter direct detection experiment using a dual-phase TPC technique at the China Jinping Underground Laboratory. Various ultra-low background technologies have been developed and applied to material screening for PandaX-4T, including HPGe gamma spectroscopy, ICP-MS, NAA, radon emanation measurement system, krypton assay station, and alpha detection system. Low background materials were selected to assemble the detector. Surface treatment procedures were investigated to further suppress radioactive background. Combining measured results and Monte Carlo simulation, the total material background rates of PandaX-4T in the energy region of 1–25 keVee are estimated to be (9.9 ± 1.9) × 10−3 mDRU for electron recoil and (2.8 ± 0.6) × 10−4 mDRU for nuclear recoil. In addition, natKr in the detector is estimated to be < 8 ppt.
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