摘要
大气气溶胶中关键核素210Pb和210Po对人体的剂量贡献不可忽视,气溶胶中的210Pb和210Po主要来自大气中222Rn的衰变。UNSCEAR报告给出的近地面大气中210Pb、210Po的平均活度浓度推荐值分别为500μBq/m3、50μBq/m3。分析讨论了大气气溶胶中210Pb和210Po的天然来源,以及煤炭开采利用、土壤再悬浮、平流层气溶胶贡献、不同气团的来源、火山烟羽、生物释放、其他人为活动影响等额外来源。
210pb and 210Po, key nuclides in atmospheric aerosol, are mainly from decay of 222Rn in the atmosphere. Their contributions to human dose cannot be overlooked definitely. A brief account about their activity concentration ranges in atmospheric aerosol is provided. As recommended in UNSCEAR reports, mean activity concentrations of them in near surface atmosphere are 500 and 50 Bq/m3 respectively. The natural sources, as well as additional sources, of both nuclides are also analyzed and discussed.
出处
《辐射防护通讯》
2015年第6期17-22,共6页
Radiation Protection Bulletin
