γ谱法测量环境中的^(210)Pb  

The Environmental ^(210)Pb Determination by γ-ray Spectrometry

作　　者：王克斌 向元益 曹钟港 杨阳 

机构地区：[1]浙江国辐环保科技中心,杭州310000 [2]浙江省辐射环境监测站,杭州310012

出　　处：《核电子学与探测技术》2015年第6期639-641,共3页Nuclear Electronics & Detection Technology

摘　　要：介绍了用γ谱仪测量环境中210Pb的分析方法。用醋酸纤维滤膜采集气溶胶样品,或用马林杯直接封装环境水样,在γ谱仪上测量210Pb发射的46.5 ke V射线,通过解谱分析技术获得210Pb的放射性活度。该方法具有快速、非破坏性、无需化学分离及样品处理等优点,但存在低γ发射几率及射线能量低导致的高自吸收等不足,分析的关键在于γ谱仪效率刻度。实验结果表明:γ谱法可用于环境样品中210Pb的放射性活度测量。In this work,the γ-ray spectrometry is introduced to measure the activity concentration of210 Pb in the environmental samples. By measuring the γ-ray of210 Pb at 46. 5 ke V,the activity concentration of210 Pb is determined in aerosol sample collected by cellulose acetate membranes filter and in water sample in Marinelli Beaker. The great advantage of this method is rapid,non-destructive,without preliminary chemical separation and sample preparation,but it is limited by the low emission and high self-absorption probability of this line at such low energy. The key point in the analysis is the efficiency calibration of this line. The experimental results show that the gamma ray spectrometry can be employed to determine the210 Pb activity in the environmental sample.

关 键 词：210Pb Γ能谱法 辐射监测 效率刻度 

分 类 号：TE991[石油与天然气工程—石油机械设备]