Measurement of the dead layer thickness in a p-type point contact germanium detector

Abstract

A 994g mass p-type PCGe detector was deployed by the first phase of the China Dark matter EXperiment aiming at the direct searches of light weakly interacting massive particles. Measuring the thickness of the dead layer of a p-type germanium detector is an issue of major importance since it determines the fiducial mass of the detector. This work reports a method using an uncollimated 133Ba source to determine the dead layer thickness. The experimental design, data analysis and Monte Carlo simulation processes, as well as the statistical and systematic errors are described. An agreement between the experimental data and simulation results was achieved to derive the thickness of the dead layer of 1.02 mm.

7 pages, 9 figures

References in corpus (2)

• Results from a Search for Light-Mass Dark Matter with a P-type Point Contact Germanium Detector
• Limits on light WIMPs with a germanium detector at 177 eVee threshold at the China Jinping Underground Laboratory

Cited by in corpus (8)

• Characterization and Performance of Germanium Detectors with sub-keV Sensitivities for Neutrino and Dark Matter Experiments
• Bulk and Surface Event Identification in p-type Germanium Detectors
• The first result on 76Ge neutrinoless double beta decay from CDEX-1 experiment
• Identification of the anomalous fast bulk events in a p-type point contact germanium detector
• GeMSE: a Low-Background Facility for Gamma-Spectrometry at Moderate Rock Overburden
• Projected WIMP sensitivity of the CDEX-50 dark matter experiment
• Search for Neutrinoless Double-Beta Decay of ${}^{76}$Ge with a Natural Broad Energy Germanium Detector
• Characterization of High-Purity Germanium Detectors with Amorphous Germanium Contacts in Cryogenic Liquids