α放射性气溶胶快速监测仪响应时间的研究  

Study on Responding Time of α Rapid Radioactive Aerosol Monitors

作　　者：谷铁男[1] 邵贝贝[1] 张燕[2] 段再煜[2] 李洋[2] 刘翠红[2] 薛涛[1] 

机构地区：[1]清华大学工程物理系,北京100084 [2]海军核化安全研究所,北京100077

出　　处：《核电子学与探测技术》2013年第4期400-403,433,共5页Nuclear Electronics & Detection Technology

摘　　要：能量甄别法是消除天然放射性对测量干扰最常用的方法之一。通过理论推导和数值计算的方法建立了补偿系数K、仪器探测效率、取样流量、探测下限及环境中天然氡子体浓度与放射性气溶胶监测仪响应时间的关系。结果表明,减小补偿系数K,提高探测效率,增大取样流量,提高人工放射性气溶胶探测下限,降低天然放射性气溶胶浓度,均可缩短仪器的响应时间。结果可为设计优化放射性气溶胶监测装置提供参考。Energy discrimination is an important method to eliminate the interference of measurement caused by natural radioactivity. Through the methods of theoretical derivation as well as numerical calculation, the article established the relationships between responding time of radioactive aerosol monitor with equalization coefficient K, instrument detecting efficiency, sampling flow, detection limit as well as the concentration of radon daugh- ter. Results show that responding time of radioactive aerosol monitor can be shorten by decreasing equalization eoeiiieient K, improving instrument detecting efficiency, increasing sampling flow, raising detection limit of ar- tificial radioactive aerosol and lowering concentration of natural radioactive aerosol. This is beneficial to optimi- zing the design of radioactive aerosol monitor.

关 键 词：能量甄别法 放射性气溶胶 响应时间 

分 类 号：X837[环境科学与工程—环境工程]