13-07U

# 13-07U

Integral brackets and pair-scattering functions of the kinetic theory for dense gaseous mixtures with multistep interaction

Matrix elements of the linearized collision operator of linearized kinetic theory for dense gaseous mixtures with multistep interaction are found in the approximation of several first Sonine-Laguerre polynomials. They are expressed in terms of omega-integrals referred to the whole multistep potential. Pair-collision cross-sections for descending, ascending, and reflection processes on a step are obtained as functions of the relative velocity of particles. New types of cross-sections for the descending and ascending processes are revealed which concern with change of absolute value of the relative velocity only. Corresponding partial omega-integrals are found as dependences on a step height and temperature.