Rogozina Marina, Zhukovsky Michael, Ekidin Aleksey, Vasyanovich Maksim
Institute of Industrial Ecology, Ural Branch Russian Academy of Sciences, S. Kovalevskoy St. 20, Eekaterinburg 620990, Russia.
Institute of Industrial Ecology, Ural Branch Russian Academy of Sciences, S. Kovalevskoy St. 20, Eekaterinburg 620990, Russia
Radiat Prot Dosimetry. 2014 Nov;162(1-2):10-3. doi: 10.1093/rpd/ncu208. Epub 2014 Jul 7.
Field experiments in the atmosphere of monazite warehouses with a high content of (220)Rn progeny concentration were conducted. Size distribution of aerosol particles was measured with the combined use of diffusion battery with varied capture elements and cascade impactor. Four (212)Pb aerosol modes were detected-three in the ultrafine region (aerosol median thermodynamic diameters ∼0.3, 1 and 5 nm) and one with an aerosol median aerodynamic diameter of 500 nm. The activity fraction of aerosol particles with the size <10 nm is nearly 20-25 %. The dose conversion factor for EEC₂₂₀Rn exposure, obtained on the basis of the aerosol size distribution and existing research data on lung absorption types of (212)Pb aerosols, is close to 180 nSv per Bq h m(-3).
在独居石仓库大气中进行了现场实验，这些仓库中（220）Rn子体浓度很高。结合使用具有不同捕集元件的扩散电池和多级冲击器测量了气溶胶颗粒的尺寸分布。检测到四种（212）Pb气溶胶模态——三种在超细区域（气溶胶中位热力学直径约为0.3、1和5纳米），一种气溶胶中位空气动力学直径为500纳米。尺寸<10纳米的气溶胶颗粒的活度分数接近20%-25%。基于气溶胶尺寸分布和关于（212）Pb气溶胶肺吸收类型的现有研究数据获得的EEC₂₂₀Rn暴露剂量转换因子接近每贝克勒尔·小时·立方米180纳希沃特。
