Collision Density of Hot Atoms. II

Abstract

Analytical and stochastic methods are used to investigate hot‐atom reactions for relatively low‐energy hot atoms such as those produced by photochemical processes. Collision densities for hot atoms are presented for several reactive systems in which the reaction probability and the threshold energy are varied. Solutions for the collision density obtained by analytical methods and independently by stochastic methods were in satisfactory agreement. The results show that even small reaction probabilities can have a marked influence on the collision density distribution, an effect attributed to highly anisotropic scattering collisions. The temperature dependence of hot‐atom reaction rates for a system containing two kinds of reactive molecules with different threshold energies was also investigated.