Intercomparison and evaluation of gamma spectrometry analysis of radioactive inert gas 85Kr
10.13491/j.issn.1004-714X.2025.06.019
- VernacularTitle:放射性惰性气体85Kr的γ能谱分析比对与评价
- Author:
Baolu YANG
1
;
Shuying KONG
1
;
Qiang ZHOU
1
;
Fei TUO
1
;
Zeshu LI
1
;
Ming ZHANG
2
;
Ruiqin ZHANG
3
;
Yazhou NIU
3
Author Information
1. Key Laboratory of Radiological Protection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China.
2. National Institute of Metrology, Beijing 100085, China.
3. CTBT Beijing National Data Centre and Beijing Radionuclide Laboratory, Beijing 100085, China.
- Publication Type:OriginalArticles
- Keywords:
85Kr;
Gamma spectrometry analysis;
Inter-laboratory compariso;
Radioactive inert gas
- From:
Chinese Journal of Radiological Health
2025;34(6):902-905
- CountryChina
- Language:Chinese
-
Abstract:
Objective As an important monitoring target for gaseous effluents from nuclear facilities, the radioactive inert gas 85Kr requires accurate measurement, which is crucial for nuclear safety and radiation protection. This study organized an inter-laboratory comparison activity for 85Kr gamma-ray spectrometry measurements, with the aims of identifying potential problems in 85Kr measurement and improving detection capabilities and proficiency. Methods Four laboratories participated in this comparison. Each laboratory employed gamma-ray spectrometry to measure the comparison samples, and the results were evaluated using the En value. Results The measurement results from all participating institutions were acceptable, with the maximum En value being 0.73. The results demonstrate that despite the low gamma-ray branching ratio of 85Kr and its susceptibility to interference from the 511 keV positron annihilation peak, gamma-ray spectrometry can achieve reliable activity measurements of 85Kr. Conclusion The comparison for 85Kr gamma-ray spectrometry tested the capabilities of the participating laboratories in 85Kr measurement. It promoted technical exchange and experience sharing among laboratories, laying a foundation for future comparisons involving more complex radioactive inert gases.
