Material Screening with HPGe Counting Station for PandaX Experiment

Xuming Wang; Xun Chen; Changbo Fu; Xiangdong Ji; Xiang Liu; Yajun Mao; Hongwei Wang; Siguang Wang; Pengwei Xie; Tao Zhang

doi:10.1088/1748-0221/11/12/T12002

Material Screening with HPGe Counting Station for PandaX Experiment

Instrumentation and Detectors 2016-12-21 v2 High Energy Physics - Experiment

Authors: Xuming Wang , Xun Chen , Changbo Fu , Xiangdong Ji , Xiang Liu , Yajun Mao , Hongwei Wang , Siguang Wang , Pengwei Xie , Tao Zhang

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Abstract

A gamma counting station based on high-purity germanium (HPGe) detector was set up for the material screening of the PandaX dark matter experiments in the China Jinping Underground Laboratory. Low background gamma rate of 2.6 counts/min within the energy range of 20 to 2700 keV is achieved due to the well-designed passive shield. The sentivities of the HPGe detetector reach mBq/kg level for isotopes like K, U, Th, and even better for Co and Cs, resulted from the low-background rate and the high relative detection efficiency of 175%. The structure and performance of the counting station are described in this article. Detailed counting results for the radioactivity in materials used by the PandaX dark-matter experiment are presented. The upgrading plan of the counting station is also discussed.

Keywords

particle detector

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@article{arxiv.1608.08345,
  title  = {Material Screening with HPGe Counting Station for PandaX Experiment},
  author = {Xuming Wang and Xun Chen and Changbo Fu and Xiangdong Ji and Xiang Liu and Yajun Mao and Hongwei Wang and Siguang Wang and Pengwei Xie and Tao Zhang},
  journal= {arXiv preprint arXiv:1608.08345},
  year   = {2016}
}

Material Screening with HPGe Counting Station for PandaX Experiment

Abstract

Keywords

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