提高大气气溶胶放射性分析灵敏度的研究  

Research on how to improve analytical sensitivity of the radioactive atmospheric aerosol

作　　者：周强[1] 徐翠华[1] 拓飞[1] 张庆[1] 张京[1] 李文红[1] 张建峰[1] 苏旭[1] 

机构地区：[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,北京100088

出　　处：《中国医学装备》2013年第9期1-4,共4页China Medical Equipment

基　　金：卫生行业科研专项(201002009)"辐射危害控制与核辐射卫生应急处置关键技术研究及其应用"

摘　　要：目的:提高涉核事件监测现场便携式空气采样器监测气溶胶的灵敏度。方法:采用多台便携式空气采样器并联采样,利用无源效率刻度技术对γ能谱进行刻度的测量分析方法。结果:并联采样后单位时间内,采样体积成倍增加,核素的最小可探测活度浓度明显下降。结论:采用多台便携式空气采样器并联的采样和测量分析方法,可显著提高可疑核事件的监测灵敏度。Objective： To improve the monitoring sensitivity of air samples by using the field- portable air sampler during of nuclear-related events. Methods： Portable air sampler parallel sampling combined with gamma spectroscopy methods and laboratory sourceless calibration software were used for the measuring analysis in the study. Results： After the parallelled in unit time, sample volume was doubled, the minimum detectable activity concentration of radionuclides decreased greatly. Conclusion： The monitoring sensitivity of suspected nuclear events could be significantly improved by using portable air sampler parallel sampling, measurement and analysis.

关 键 词：气溶胶 实验室无源效率刻度软件 Γ能谱仪 最小可探测活度浓度 

分 类 号：R817[医药卫生—影像医学与核医学]