辐射防护 ›› 2018, Vol. 38 ›› Issue (3): 197-204.

• 辐射防护监测 • 上一篇    下一篇

北京市气溶胶放射性核素分析(2013—2016)

武永伟1,2,3, 曾志1,2, 马豪1,2   

  1. 1.清华大学工程物理系,北京 100084;
    2.清华大学粒子技术与辐射成像教育部重点实验室,北京 100084;
    3.中国人民解放军63666部队,新疆 马兰 841700
  • 收稿日期:2017-06-27 出版日期:2018-05-20 发布日期:2020-07-21
  • 通讯作者: 曾志。E-mail: zengzhi@tsinghua.edu.cn
  • 作者简介:武永伟(1987—),男,2010年7月毕业于东华理工大学核工程与核技术专业,现就读于清华大学工程物理系核科学与技术专业。 E-mail:wuyw15@yeah.net

Radionuclide analysis of aerosol in Beijing (2013—2016)

WU Yongwei1,2,3, ZENG Zhi1,2, MA Hao1,2   

  1. 1. Department of Engineering Physics,Tsinghua University,Beijing 100084;
    2. Key Laboratory of Particle and Radiation Imaging,Ministry of Education,Tsinghua University,Beijing 100084;
    3. No. 63666 Unit of PLA,Xinjiang Malan 841700
  • Received:2017-06-27 Online:2018-05-20 Published:2020-07-21

摘要: 利用中国锦屏地下实验室(CJPL)低本底γ谱仪对北京地区近4年34组气溶胶样品中长寿命放射性核素进行研究。发现气溶胶样品中含有238U、226Ra、210Pb、232Th、228Ra、 40K、7Be、137Cs,其活度浓度均值分别为17.47 μBq·m-3、21.19 μBq·m-3、2.39 mBq·m-3、11.12 μBq·m-3、14.43 μBq·m-3、226.64 μBq·m-3、6.98 mBq·m-3、2.36 μBq·m-3,且均在本底范围之内。同时,放射性核素活度浓度与环境参数存在相关性,7Be、40K、137Cs、226Ra均与季节负相关,210Pb与季节正相关;40K与空气质量指数(AQI)正相关。

关键词: 气溶胶, γ谱分析, 放射性核素

Abstract: The long-lived radionuclides in 34 groups of aerosol samples collected in Beijing for nearly four years were studied through low-background γ-spectrometer at the China Jinping Underground Laboratory (CJPL). Radioactivity of the nuclides 238U, 226Ra, 210Pb, 232Th, 228Ra, 40K, 7Be, 137Cs were measured and their mean values were 17.47 μBq·m-3, 21.19 μBq·m-3, 2.39 mBq·m-3, 11.12 μBq·m-3, 14.43 μBq·m-3, 226.64 μBq·m-3, 6.98 mBq·m-3, 2.36 μBq·m-3 , which are within the range of background. Meanwhile, there were moderate correlations between the activity concentrations of radionuclides and environmental parameters. The values of 7Be, 40K, 137Cs and 226Ra were negatively correlated to the seasons, and 210Pb oppositely; the value of 40K was positively correlated to AQI.

Key words: aerosol, γ-spectrometry analysis, radionuclide

中图分类号: 

  • X830.3