Measurement of 37Ar Activity by Low Background Internal Gas Proportional Counter

被引：0

作者：

Li Q. ^{[1
]}

Fan Y. ^{[1
]}

Wang S. ^{[1
]}

Zhao Y. ^{[1
]}

Chang Y. ^{[1
]}

Jia H. ^{[1
]}

Liu S. ^{[1
]}

Zhang X. ^{[1
]}

机构：

[1] CTBT Beijing National Data Centre and Radionuclide Laboratory, Beijing

来源：

Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | 2019年 / 53卷 / 04期

关键词：

!sup]37[!/sup]Ar; Comprehensive Nuclear-Test-Ban Treaty; Internal gas proportional counter; On-site inspection;

D O I：

10.7538/yzk.2018.youxian.0453

中图分类号：

学科分类号：

摘要：

37Ar is one of the important radionuclides for on-site inspection compliance with Comprehensive Nuclear-Test-Ban Treaty. High sensitive detection of 37Ar is a key step for underground nuclear test monitoring. A low background internal gas proportional counter system was established in Beijing Radionuclide Laboratory. The background of proportional counter caused by cosmic-ray was actively shielded by plastic scintillator detectors which were equipped on the top and the bottom of the lead shielding. The background count rate of 37Ar peak region in anti-cosmic spectrum was reduced to 7.3% of which in the original spectrum. Within 24 h measurement, the minimum detectable activity of 37Ar of 2.5 mBq was achieved. © 2019, Editorial Dept. of JA. All right reserved.

引用

页码：734 / 738

页数：4

共 10 条

[1] Zhang L., Radioactive noble gases monitoring for the verification of the Comprehensive Nuclear-Test-Ban Treaty, Nuclear Techniques, 27, 10, pp. 770-777, (2004)
[2] Carrigan C., Heinle R., Hudson G., Et al., Trace gas emissions on geological faults as indicators of underground nuclear testing, Nature, 382, pp. 528-531, (1996)
[3] Barsanov V.I., Dzhanelidze A.A., Zlokazov S.B., Et al., Artificial neutrino source based on the 37Ar isotope, Physics of Atomic Nuclei, 70, 2, pp. 300-310, (2007)
[4] Xiang Y., Gong J., Li W., Et al., Development of a system of measuring 37Ar spectrum method, Acta Physica Sinica, 57, 2, pp. 784-789, (2008)
[5] Aalseth C.E., Day A.R., Haas D.A., Et al., Measurement of 37Ar to support technology for on-site inspection under the Comprehensive Nuclear-Test-Ban Treaty, Nuclear Instruments and Methods in Physics Research A, 652, pp. 58-61, (2011)
[6] Aalseth C.E., Humble P.H., Mace E.K., Et al., Shielding concepts for low-background proportional counter arrays in surface laboratories, Applied Radiation and Isotopes, 108, pp. 92-99, (2016)
[7] Aalseth C.E., Day A.R., Fuller E.S., Et al., A new shallow underground gas-proportional counting lab: First results and 37Ar sensitivity, Applied Radiation and Isotopes, 81, pp. 151-155, (2013)
[8] Loosili H.H., Martin M., Hans O., Low-level gas proportional counting in an underground laboratory, Radiocarbon, 22, 2, pp. 461-469, (1980)
[9] Xiang Y., Gong J., Li W., Et al., Efficiency of gas proportional counter for 37Ar, Nuclear Techniques, 30, 10, pp. 828-832, (2007)
[10] Williams R.M., Aalseth C.E., Bowyer T.W., Et al., Development of a low-level 37Ar calibration standard, Applied Radiation and Isotopes, 109, pp. 430-434, (2016)

← 1 →