The Study on Differentiated Particle Size Sampling Technology of Aerosols

This article introduces basic principle of differentiated particle size sampling technology of aerosols.This sampling technology is used to conduct a experimental research on the aerosols particles size distribution of uranium and radon and it's daughters.Experimental results showed that the part of radon and it's daughters aerosols particles size smaller than 0.43 μm reached 76.4%.The part of radon and it's daughters aerosols particles size less than 1 μm reached 96.3%.The part of uranium aerosol particles size larger than 4.7 μm under specific conditions is 94%,the part of aerosol particles size larger than 10 μm is 72%.According to the experiment's result,we designed a new sampling equipments that cutting size is 1 μm to collect samples of aerosols,and it used carried in the separation efficiency experiments of 241Am aerosols.Experimental results showed that the separation efficiency of 241Am aerosols can reach 94.2%.Thus,using the differentiated particle size sampling technology to collect samples of plutonium aerosols,in the sampling process can reduce the effect of natural background aerosols.

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