Charge Distributions for Radioactive Aerosols in a Bipolar Atmosphere Permeated by an Electric Field

摘要

Steady-state charge distributions are obtained for radioactive aerosol particles in bipolar ionized atmospheres with concentrations of 10 exp 2 to 10 exp 8 ions/cm exp 3 . Ion--particle attachment is based on a diffusion--conduction model with unequal ion mobilities. Asymptotic formulas for charge distributions are derived from charge transfer rate equations. Cases include low and high specific activities with weak and strong electric fields. Mean charge and variance are obtained for Poisson and shifted Gaussian approximations in the appropriate cases. Comparisons are made with numerically calculated distributions. (ERA citation 03:053443)