| Zhou Qiang,Tuo Fei,Zhang Jing,Yao Shuaimo,Li Wenhong,Li Zeshu.Intercomparison and evaluation on γ-spectrometry of radionuclides in water[J].Chinese Journal of Radiological Medicine and Protection,2017,37(9):700-704 |
| Intercomparison and evaluation on γ-spectrometry of radionuclides in water |
| Received:February 15, 2017 |
| DOI：10.3760/cma.j.issn.0254-5098.2017.09.012 |
| KeyWords:Intercomparison γ-spectrometry Radionuclides |
| FundProject:科技部基础性工作专项资金（2014FY211000）。 |
| Author Name | Affiliation | E-mail | | Zhou Qiang | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Tuo Fei | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | flytuo@163.com | | Zhang Jing | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Yao Shuaimo | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Li Wenhong | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | | | Li Zeshu | Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China | |
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| Abstract:: |
| Objective To improve the γ-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 238U, 226Ra, 208Tl, 228Ac, 40K, 241Am, 137Cs, and 60Co 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. |
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