Establishment of Anti-cosmic Ray HPGe Gamma Spectrometer

被引：0

作者：

Zhu Y. ^{[1
]}

Li Q. ^{[2
]}

Fan Y. ^{[2
]}

Zhao Y. ^{[2
]}

Wang S. ^{[2
]}

Zhang X. ^{[2
]}

Jia H. ^{[2
]}

Zhang R. ^{[2
]}

Li R. ^{[2
]}

Zhou J. ^{[1
]}

机构：

[1] School of Nuclear Science and Technology, University of South China, Hengyang

[2] CTBT Beijing National Data Centre, Beijing Radionuclide Laboratory, Beijing

来源：

Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | 2023年 / 57卷 / 03期

关键词：

anti-cosmic ray γ spectrometer; low background; minimum detectable activity; radionuclide verification;

D O I：

10.7538/yzk.2022.youxian.0243

中图分类号：

学科分类号：

摘要：

Radionuclide verification is one of the four monitoring technologies used in International Monitoring System of Comprehensive Nuclear-Test-Ban Treaty (CTBT). The activity of radionuclides concerned by CTBT generally performs at the low-level. An anti-cosmic ray y spectrometer system with a HPGe detector was developed by using a combination of active and passive shielding techniques in order to improve the detection sensitivity and reduce the affections of background. By adjusting the system with a delay time and testing anticoincidence count loss correction, compared with the original γ spectrum, the integral background in the energy range of 15-2 700 keV is reduced by a factor of 8. The detection sensitivity is greatly improved by using the anti-coincidence method. For 10Ba, the minimum detectable activity (MDA) is 10mBq by using the anti-cosmic ray γ spectrometer for 7 d measurement, which meets the technical requirements for certification of nuclide laboratory under the CTBT. It is not only of great significance for CTBT radionuclide verification, but also important for radiation environment monitoring. © 2023 Atomic Energy Press. All rights reserved.

引用

页码：639 / 645

页数：6

共 20 条

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