Yield and Concentration Microplumes for Electron Impact on Water

used to calculate the spatial distributions of the initial species created by electron energy deposition in water vapor. Results on the gross yields are also presented. The influence of diffusion in the steady state is calculated with the help of a Legendre polynomial expansion of the source function. Having obtained the concentrations associated with this source function in the form of a Legendre expansion, we found a particularly simple closed formula which yields approximately the same results. These analytic source and concentration distributions can serve as convenient inputs for studies of the chemical and biological stages of radiation action. ? 1985 Academic Press, Inc.