中文摘要：

研究了深圳市大气颗粒物中210Po的放射性比活度及其对人体所致辐照剂量.深圳大气总悬浮颗粒物(TSP)和PM2.5中210Po的比活度变化范围为0.01~0.20mBq/m3(平均0.08mBq/m3)和0.03~0.38mBq/m3(平均0.12mBq/m3).研究发现,大气210Po比活度与大气PM2.5含量呈显著的正相关关系,而与降雨呈弱负相关,认为大气颗粒物是影响大气210Po含量的重要因素.由呼吸摄入210Po所致人体的年均待积有效剂量为4.53×10-6Sv.

英文摘要：

The activity concentration of210Poin atmospheric aerosol of Shenzhen and its committed effective dose throughinhalation were studied.The activity concentrations of210Po in total suspended particle(TSP)and PM2.5were in the rangeof0.01~0.20mBq/m3(with an average of0.08mBq/m3)and0.03~0.38mBq/m3(with an average of0.12mBq/m3),respectively.The activity concentration of210Po showed significant positive correlation with the atmosphericconcentration of PM2.5,whereas it showed poor relationship with the amount of rainfall.It is suggested that theatmosphericparticle was the key factor that control the activity concentration of210Po in the air.The calculated averageannual committed effective dose of210Po through inhalation was4.53×10-6Sv.