Material Screening with HPGe Counting Station for PandaX Experiment

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.

References in corpus (3)

• Radiogenic and Muon-Induced Backgrounds in the LUX Dark Matter Detector
• Low-Background gamma counting at the Kimballton Underground Research Facility
• Highly Sensitive Gamma-Spectrometers of GERDA for Material Screening: Part 2

Cited by in corpus (5)

• Radiopurity assessment of the tracking readout for the NEXT double beta decay experiment
• Radiopurity assessment of the energy readout for the NEXT double beta decay experiment
• Assay of low-background stainless steel by smelting for the neutrino experiment at Jinping
• Study on U/Th residual radioactivity in acrylic from surface treatment
• BambooMC -- A Geant4-based simulation program for the PandaX experiments