国际比对模拟气溶胶滤膜γ能谱测量及分析讨论

辐射防护通讯 ›› 2023, Vol. 43 ›› Issue (5): 35-39.

国际比对模拟气溶胶滤膜γ能谱测量及分析讨论

李斌, 徐哲婷, 何俞政涵, 王欣刚, 龚传德

浙江省辐射环境监测站, 国家环境保护辐射监测重点实验室, 浙江省辐射环境安全监测重点实验室, 浙江杭州, 310012

收稿日期:2023-01-30 出版日期:2023-10-20 发布日期:2024-01-02
作者简介:李斌(1977— ),男,2000年毕业于北京理工大学火工与烟火技术专业,学士; 2010年毕业于中国科学院近代物理研究所粒子物理与原子核物理专业,博士; 高级工程师。E-mail:26463864@qq.com
基金资助:
浙江省生态环境科研和成果推广项目(No.2022HT0060)。

Analysis and Discussion on International Intercomparison of Simulated Aerosol Filter γ-Spectrometry

Li Bin, Xu Zheting, He-Yu Zhenghan, Wang Xingang, Gong Chuande

Zhejiang Province Environmental Radiation Monitoring Station, State Environmental Protection Key Laboratory of Radiation Environmental Monitoring, Zhejiang Key Laboratory of Radiation Environmental Safety Monitoring, Hangzhou 310012

Received:2023-01-30 Online:2023-10-20 Published:2024-01-02

摘要/Abstract

摘要： 自制参考源,结合LabSOCS模拟软件的符合相加修正功能,用γ能谱法测量了2019年国际原子能机构(IAEA)全球实验室间比对3个模拟气溶胶滤膜样品中¹³⁴Cs、¹³⁷Cs含量,测量结果与IAEA参考值相对偏差<4%。¹³⁴Cs 5个发射几率较大的能峰符合相加修正系数范围为0.729~0.829;近几何测量时不考虑符合相加修正可能导致结果的偏差>20%;探测效率受滤膜到探测器表面距离影响显著。本文的研究结果对核电厂气载流出物气溶胶样品测量有借鉴意义。

关键词: 模拟气溶胶滤膜, γ能谱测量, 符合相加修正

Abstract: Employing self-made radioactive reference source and LabSOCS (Laboratory Sourceless Calibration Software), the radioactivity of ¹³⁴Cs and ¹³⁷Cs of three simulated aerosol filters for IAEA intercomparison were determined by γ-spectrometry in 2019. The relative deviations between the measured results and the IAEA reference values were less than 4%. The coincidence summing correction factors for the five full-energy-peaks with high emission probability of ¹³⁴Cs were from 0.729 to 0.829. Ignoring coincidence summing correction in near geometry configuration may result in a deviation of more than 20%. The detection efficiency was significantly affected by the distance between the sample and the detector. This study can be applied for aerosol filter measurement of airborne effluent from nuclear power plants.

Key words: Simulated aerosol filter, Gamma-ray spectrometry, Coincidence summing correction

中图分类号:

TL817.2

李斌, 徐哲婷, 何俞政涵, 王欣刚, 龚传德. 国际比对模拟气溶胶滤膜γ能谱测量及分析讨论[J]. 辐射防护通讯, 2023, 43(5): 35-39.

Li Bin, Xu Zheting, He-Yu Zhenghan, Wang Xingang, Gong Chuande. Analysis and Discussion on International Intercomparison of Simulated Aerosol Filter γ-Spectrometry[J]. RADIATION PROTECTION BULLETIN, 2023, 43(5): 35-39.