Low radioactive material screening and background control for the PandaX-4T experiment
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Published:2022-06-27
Issue:6
Volume:2022
Page:
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ISSN:1029-8479
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Container-title:Journal of High Energy Physics
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language:en
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Short-container-title:J. High Energ. Phys.
Author:
, Qian Zhicheng, Si Lin, Abdukerim Abdusalam, Bo Zihao, Chen Wei, Chen Xun, Chen Yunhua, Cheng Chen, Cheng Yunshan, Cui Xiangyi, Fan Yingjie, Fang Deqing, Fu Changbo, Fu Mengting, Geng Lisheng, Giboni Karl, Gu Linhui, Guo Xuyuan, Han Ke, He Changda, He Jinrong, Huang Di, Huang Yanlin, Huang Zhou, Hou Ruquan, Ji Xiangdong, Ju Yonglin, Li Chenxiang, Li Mingchuan, Li Shu, Li Shuaijie, Lin Qing, Liu Jianglai, Lu Xiaoying, Luo Lingyin, Ma Wenbo, Ma Yugang, Mao Yajun, Meng YueORCID, Ning Xuyang, Qi Ningchun, Ren Xiangxiang, Shaheed Nasir, Shang Changsong, Shen Guofang, Sun Wenliang, Tan Andi, Tao Yi, Wang Anqing, Wang Meng, Wang Qiuhong, Wang Shaobo, Wang Siguang, Wang Wei, Wang Xiuli, Wang Zhou, Wu Mengmeng, Wu Weihao, Xia Jingkai, Xiao Mengjiao, Xiao Xiang, Xie Pengwei, Yan Binbin, Yan Xiyu, Yang Jijun, Yang Yong, Yu Chunxu, Yuan Jumin, Yuan Ying, Zhang Dan, Zhang Minzhen, Zhang Peng, Zhang Tao, Zhao Li, Zheng Qibin, Zhou Jifang, Zhou Ning, Zhou Xiaopeng, Zhou Yong
Abstract
Abstract
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.
Publisher
Springer Science and Business Media LLC
Subject
Nuclear and High Energy Physics
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