Intercomparison and evaluation onγ-spectrometry of radionuclides in water
10.3760/cma.j.issn.0254-5098.2017.09.012
- VernacularTitle:水样品放射性核素γ能谱分析的比对与评价
- Author:
Qiang ZHOU
1
;
Fei TUO
;
Jing ZHANG
;
Shuaimo YAO
;
Wenhong LI
;
Zeshu LI
Author Information
1. 中国疾病预防控制中心辐射防护与核安全医学所 辐射防护与核应急中国疾病预防控制中心重点实验室
- Keywords:
Intercomparison;
γ-spectrometry;
Radionuclides
- From:
Chinese Journal of Radiological Medicine and Protection
2017;37(9):700-704
- CountryChina
- Language:Chinese
-
Abstract:
Objective To improve theγ-spectrometry analysis technology in water sample through the intercomparison conducted among the key laboratories. Methods To take part in the intercomparison of γ-spectrometry analysis in water sample organized by National Institute of Metrology ( NIM ) , the radionuclides of 238 U,226 Ra, 208 Tl, 228 Ac, 40 K, 241 Am, 137 Cs, and 60 Co in water sample were determined. The efficiency of the detector was calibrated renewedly by new standard source in 2015 and a new γ-spectrometry (BE5030) was used for sample measurement. Results Analysis and comparison of the three measurement results and the leading laboratory reference values showed that the results measured by γ-spectrometry ( BE5030 ) were better, especially for the natural radionuclides. The maximum En value between them and NIM reference value was only 0. 71. Conclusions The wide range energy γ-spectrometry (BE5030) has obvious advantages in the measurement and analysis of natural radionuclides. Due to the special structure of the wide range energy detector, its background interference is less in low energy area. This inter-comparison improved the accuracy of sample measurements and analysis, with good result achieved.
