固体径迹法测量氡及子体的判断阈和探测限  

Determination threshold and detection limits of Radon and its daughter by solid track method

作　　者：曹磊[1] 邓君[2] 吴鹏 王晓涛 王洪胜[1] 郭泽钦[1] CAO Lei;DENG Jun;WU Peng;WANG Xiaotao;WANG Hongsheng;GUO Zeqin(Beijing Institute of Occupational Medicine for Chemical Industry,Beijing 100093 China;National Institute for Radiological Protection,China CDC;Nuclear and Radiation Safety Center)

机构地区：[1]北京市化工职业病防治院,北京100093 [2]中国疾病预防控制中心辐射防护与核安全医学所 [3]生态环境部核与辐射安全中心

出　　处：《中国辐射卫生》2020年第3期246-248,共3页Chinese Journal of Radiological Health

基　　金：科研院所技术开发研究专项基金(2012EG150137);北京市职业病防治领域高层次专业技术人才培养项目(2014742603767J008)。

摘　　要：目的研究利用固体径迹技术测量氡及子体的瓶颈技术问题,探讨本底氡对个人监测可靠性的影响及有效控制方法。方法依据统计学规律,参考相关文献,结合剂量学分析,推导固体径迹技术测量氡及子体的判断阈和探测下限,进行辐射剂量估算。结果利用应用举例方式,给出了具体实例的判断阈和探测下限。结论发生β错误的概率不仅与判断阈LC有关,而且与净径迹计数有关。净径迹计数值越大,β错误的概率就越小,可给出最小可探测径迹计数,估计最小可探测氡浓度,提高了氡个人剂量监测的可靠性。Objective The bottleneck technique of measuring Radon and its daughter by solid track technique was studied,and the influence of background Radon on individual monitoring reliability and effective control methods were discussed.Methods According to the law of statistics,referring to the relevant literature,combined with the dosimetry analysis,the judgment threshold and detection lower limit by the solid track technology for Radon and its daughters were deduced,and the radiation dose was estimated.Results By using the method of application examples,the judgment threshold and detection lower limit of specific examples were given.Conclusion The probability of β error is not only related to the judgment threshold LC,but also to the net track count.The larger the value of net track meter is,the smaller the probability ofβerror is.The minimum detectable track count can be given,and the minimum detectable Radon concentration can be estimated,which improves the reliability of radon individual dose monitoring.

关 键 词：固体径迹法 氡测量 判断阈 探测下限 

分 类 号：R144.1[医药卫生—公共卫生与预防医学]