Vasyanovich M, Mostafa M Y A, Zhukovsky M
Ural Federal University, Ekaterinburg, Russia.
Institute of Industrial Ecology UB RAS, Ekaterinburg, Russia.
Radiat Prot Dosimetry. 2017 Nov 1;177(1-2):49-52. doi: 10.1093/rpd/ncx169.
Cascade impactors based on inertial deposition of aerosols are widely used to determine the size distribution of radioactive aerosols. However, there are situations where radioactive aerosols are represented by particles with a diameter of 1-5 nm. In this case, ultrafine aerosols can be deposited on impactor cascades by diffusion mechanism. The influence of ultrafine aerosols (1-5 nm) on the response of three different types of cascade impactors was studied. It was shown that the diffusion deposition of ultrafine aerosols can distort the response of the cascade impactor. The influence of diffusion deposition of ultrafine aerosols can be considerably removed by the use of mesh screens or diffusion battery installed before cascade impactor during the aerosol sampling.
基于气溶胶惯性沉积的多级冲击器被广泛用于确定放射性气溶胶的粒径分布。然而，在某些情况下，放射性气溶胶由直径为1 - 5纳米的颗粒表示。在这种情况下，超细气溶胶可通过扩散机制沉积在冲击器级联上。研究了超细气溶胶（1 - 5纳米）对三种不同类型多级冲击器响应的影响。结果表明，超细气溶胶的扩散沉积会扭曲多级冲击器的响应。在气溶胶采样期间，通过在多级冲击器之前使用筛网或扩散电池，可以显著消除超细气溶胶扩散沉积的影响。
