Measurement of the dead layer thickness in a p-type point contact germanium detector Supported by National Natural Science Foundation of China (10935005, 10945002, 11275107, 11175099)

A 994 g mass p-type PCGe detector has been deployed during the first phase of the China Dark matter EXperiment, aiming at direct searches for 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...

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Bibliographic Details
Published in:Chinese physics C 2016-09, Vol.40 (9)
Main Authors: Jiang, Hao, Yue, Qian, Li, Yu-Lan, Kang, Ke-Jun, Li, Yuan-Jing, Li, Jin, Lin, Shin-Ted, Liu, Shu-Kui, Ma, Hao, Ma, Jing-Lu, Su, Jian, Wong, Henry Tsz-King, Yang, Li-Tao, Zhao, Wei, Zeng, Zhi
Format: Article
Language:English
Subjects:
CDEX
dead layer
Monte Carlo
PPCGe
Online Access:Get full text
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Summary:A 994 g mass p-type PCGe detector has been deployed during the first phase of the China Dark matter EXperiment, aiming at direct searches for 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 uncertainties are described. A dead layer thickness of 1.02 mm was obtained based on a comparison between the experimental data and the simulated results.
ISSN:1674-1137
DOI:10.1088/1674-1137/40/9/096001