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

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...

Full description

Saved in:
Bibliographic Details
Published inChinese physics C Vol. 40; no. 9; pp. 82 - 88
Main Author 江灏 岳骞 李玉兰 康克军 李元景 李金 林兴德 刘书魁 马豪 马菁露 苏健 王子敬 杨丽桃 赵伟 曾志
Format Journal Article
LanguageEnglish
Published 01.09.2016
Subjects
厚度
实验设计
模拟过程
死层
测量
点接触
锗探测器
Online AccessGet full text
ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/40/9/096001

Cover

More Information
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.
Bibliography:11-5641/O4
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.
dead layer, CDEX, PPCGe, Monte Carlo
Hao Jiang, Qian Yue, Yuan-Jing Li, Jin Li, Hao Ma, Jing-Lu Ma, Yu-Lan Li, Ke-Jun Kang, Shin-Ted Lin,Shu-Kui Liu, Jian Su,Henry Tsz-King Wong, Li-Tao gang, Wei Zhao, Zhi Zeng（1 Dept. of Engineering Physics, Tsinghua University, Beijing 100084, China; 2 Key Laboratory of Particle ＆ Radiation Imaging （Tsinghua University）, Ministry of Education, Beijing 100084, China; 3 College of Physical Science and Technology, Siehuan University, Chengdu 610064, China; 4 Institute of Physics, Academia Sinica, Taipei 11529, China）
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/40/9/096001