Modeling the charge collection efficiency in the Li-diffused inactive layer of P-type high purity germanium detector

被引：4

作者：

Dai, W. H. ^{[1
]}

Ma, H. ^{[1
]}

Yue, Q. ^{[1
]}

Yang, L. T. ^{[1
]}

Zeng, Z. ^{[1
]}

Cheng, J. P. ^{[1
,2
]}

Li, J. L. ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Engn Phys, Key Lab Particle & Radiat Imaging, Minist Educ, Beijing 100084, Peoples R China

[2] Beijing Normal Univ, Coll Nucl Sci & Technol, Beijing 100875, Peoples R China

来源：

APPLIED RADIATION AND ISOTOPES | 2023年 / 193卷

基金：

中国国家自然科学基金;

关键词：

P-type germanium detector; Inactive layer; Charge collection efficiency; LITHIUM; FABRICATION; IMPURITIES; SCATTERING; CONTACT;

D O I：

10.1016/j.apradiso.2022.110638

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A model of the Li-diffused inactive layer in P-type high purity germanium detectors is built to describe the transportation of charge carriers and calculate the charge collection efficiency therein. The model is applied to calculate charge collection efficiency of a P-type point-contact germanium detector used in rare event physics experiments and validated in another P-type semi-planar germanium detector. The calculated charge collection efficiency curves are well consistent with measurements for both detectors. Effects of the Li doping processes on the charge collection efficiency are discussed based on the model. This model can be easily extended to other P-type germanium detectors, for instance, the P-type broad-energy Ge detector, and the P-type inverted-coaxial point-contact detector.

引用

页数：7

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