Seasonal fluctuation of activity size distribution of Be-7, Pb-210, and (210)Poradionuclides in urban aerosols

摘要

The activity size distributions of cosmogenic Be-7 and the longer living radon progenies Pb-210 and Po-210 in urban aerosols were measured for summers and winters from, 2014 to the end of 2017. The average seasonal activity median aerosol diameters (AMADs) and mass median aerosol diameters (MMADs) calculated for summer ranged from 0.329 mu m to 0.733 mu m and were ordered AMAD(Be-7),