Optimal design for μBq/kg gamma spectrometer based on Monte Carlo simulation

被引：0

作者：

Pan, Xingyu ^{[1
]}

Ma, Hao ^{[1
]}

Zeng, Zhi ^{[1
]}

Zeng, Weihe ^{[1
]}

Zeng, Ming ^{[1
]}

Cheng, Jianping ^{[1
]}

Yue, Qian ^{[1
]}

Li, Junli ^{[1
]}

Zhang, Hui ^{[1
]}

机构：

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

来源：

APPLIED RADIATION AND ISOTOPES | 2020年 / 157卷

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

gamma-ray spectrometer; Material screening; Monte Carlo simulation; LOW RADIOACTIVITY LEVELS; RAY SPECTROMETRY;

D O I：

10.1016/j.apradiso.2020.109042

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

In response to the urgent requirement of material screening in rare event experiments, a new ARray of GermaniUm gamma-ray Spectrometer (ARGUS) is planned to be established in China Jinping Underground Laboratory (CJPL). The spectrometer was optimized with Monte Carlo simulation using Geant4. Five HPGe detectors were combined in ARGUS for higher efficiency. Two shielding systems, one with liquid nitrogen, the other with lead plus copper were evaluated. With the combination of multiple detectors, low activity materials and the optimized design of shielding systems, the decision threshold at the level of 10 mu Bq/kg for U-238/Th-232 decay chain could be achieved.

引用

页数：8

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