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Low Radioactive Material Screening and Background Control for the PandaX-4T Experiment

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arxiv 2112.02892 v2 pith:DGT6CZVU submitted 2021-12-06 physics.ins-det hep-ex

Zhicheng Qian , Lin Si , Abdusalam Abdukerim , Zihao Bo , Wei Chen , Xun Chen , Yunhua Chen , Chen Cheng
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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 Qiuhong Wang Shaobo Wang Siguang Wang Wei Wang Xiuli Wang Zhou Wang Mengmeng Wu Weihao Wu Jingkai Xia Mengjiao Xiao Xiang Xiao Pengwei Xie Binbin Yan Xiyu Yan Jijun Yang Yong Yang Chunxu Yu Jumin Yuan Ying Yuan Dan Zhang Minzhen Zhang Peng Zhang Tao Zhang Li Zhao Qibin Zheng Jifang Zhou Ning Zhou Xiaopeng Zhou Yong Zhou
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classification physics.ins-dethep-ex
keywords backgroundpandax-4tmaterialdetectiondetectorestimatedexperimentmdru
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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 keV$\rm{}_{ee}$ are estimated to be (9.9 $\pm$ 1.9) $\times \ 10^{-3}$ mDRU for electron recoil and (2.8 $\pm$ 0.6) $\times \ 10^{-4}$ mDRU for nuclear recoil. In addition, $^{nat}$Kr in the detector is estimated to be <8 ppt.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Flow-dependent tagging of $^{214}$Pb decays in the LZ dark matter detector

    physics.ins-det 2025-08 conditional novelty 6.0 of 10

    Flow-dependent tagging, built from paired radon-polonium decays, identifies 63% of 214Pb beta-decay backgrounds in LZ's fiducial volume at 9.0% exposure cost.

  2. Characterization of Hamamatsu R11410-23 Photomultiplier Tubes and Performance in the PandaX-4T Detector

    hep-ex 2025-05 conditional novelty 5.0 of 10

    The PandaX-4T collaboration reports the first full characterization of 422 R11410-23 PMTs and documents their stable in-situ performance during the commissioning run.

  3. Search for Double Beta Decay of $^{136}$Xe to the $0^+_1$ Excited State of $^{136}$Ba with PandaX-4T

    nucl-ex 2025-02 conditional novelty 5.0 of 10

    PandaX-4T finds no double beta decay of 136Xe to the 0+1 excited state of 136Ba and sets a half-life limit of 7.5e22 years at 90% confidence.

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