为了正确评价放射性气溶胶对人体危害的程度,除进行浓度测量外,还需了解放射性气溶胶的粒度分布。这不仅因为放射性气溶胶能否进入下呼吸道而达到肺中是与粒子大小有关的;而且它在肺中的沉积和滞留及转入其它器官的份额也与粒子大小有关。 此外,由于除尘设备的净化效率与气溶胶粒径有关,所以,在过滤材料的细致鉴定 In order to properly assess the extent of the harmful effects of radioactive aerosols on humans, it is necessary to know the particle size distribution of radioactive aerosols in addition to the concentration measurement. This is due not only to the fact that radioactive aerosols can enter the lower respiratory tract but also to the size of the lung in the lungs; and its share in the lungs of deposition and retention and its transfer to other organs is also related to particle size. In addition, since the decontamination efficiency of the dust removal equipment is related to the particle size of the aerosol, careful identification of the filter material