Methane-rare gas interaction potentials from scattering experiments

Abstract

By using total differential cross sections with resolved diffraction oscillations and absolute integral cross sections with glory oscillations, a new improved spherically averaged potential surface for NeCH 4 is determined with a potential well depth of ϵ = 5.50 meV and a minimum distance of R m = 3.78 Å. A slightly improved parameter set is also given for the isotropic ArCH 4 interaction. By assuming the same realistic reduced potential form as was found for NeCH 4 and ArCH 4, the isotropic parts of the potential for KrCH 4 and XeCH 4 are obtained from absolute integral cross sections.