Binary-collision effects on density fluctuations of dense gases

Abstract

A dynamical theory of simple fluids which incorporates exactly all the effects of a single binary collision is used to study the dynamic structure factor $S(q,\ensuremath{\omega})$ for Lennard-Jones fluids. The comparison of our results with those of recent neutron inelastic-coherent-scattering experiments of dense krypton gas indicates that $S(q,\ensuremath{\omega})$ is sensitive to the details of the interatomic potential even in moderately dense gases.