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

Hao Jiang; Qian Yue; Yu-Lan Li; Ke-Jun Kang; Yuan-Jing Li; Jin Li; Shin-Ted Lin; Shu-Kui Liu; Hao Ma; Jing-Lu Ma; Jian Su; Henry Tsz-King Wong; Li-Tao Yang; Wei Zhao; Zhi Zeng

doi:10.1088/1674-1137/40/9/096001

Chinese Physics C> 2016, Vol. 40> Issue(9) : 096001 DOI: 10.1088/1674-1137/40/9/096001

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

Hao Jiang ^1,2 ,
Qian Yue ^1,2,, ,
Yu-Lan Li ^1,2,, ,
Ke-Jun Kang ^1,2 ,
Yuan-Jing Li ^1,2 ,
Jin Li ^1,2 ,
Shin-Ted Lin ³ ,
Shu-Kui Liu ^1,2 ,
Hao Ma ^1,2 ,
Jing-Lu Ma ^1,2 ,
Jian Su ^1,2 ,
Henry Tsz-King Wong ⁴ ,
Li-Tao Yang ^1,2 ,
Wei Zhao ^1,2 ,
Zhi Zeng ^1,2

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Abstract：
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

References

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Hao Jiang, Qian Yue, Yu-Lan Li, Ke-Jun Kang, Yuan-Jing Li, Jin Li, Shin-Ted Lin, Shu-Kui Liu, Hao Ma, Jing-Lu Ma, Jian Su, Henry Tsz-King Wong, Li-Tao Yang, Wei Zhao and Zhi Zeng. Measurement of the dead layer thickness in a p-type point contact germanium detector[J]. Chinese Physics C, 2016, 40(9): 096001. doi: 10.1088/1674-1137/40/9/096001

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Received: 2016-03-21

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Supported by National Natural Science Foundation of China (10935005, 10945002, 11275107, 11175099)

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author: Qian Yue,

Corresponding author: Yu-Lan Li,

Received Date: 2016-03-21
Available Online: 2016-09-05

Fund Project: Supported by National Natural Science Foundation of China (10935005, 10945002, 11275107, 11175099)

Abstract: 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.