Calculated long-range interactions and low energy scattering of Ar–H

Abstract

The long-range interaction potential in Ar–H is evaluated through the use of the multi-configuration-self-consistent-field (MCSCF) method. The values of C6 and C8 obtained by analysis of the dispersion terms in this potential agree with previous calculations and estimates. The potential is used to calculate the total elastic cross sections for low energy hydrogen-argon scattering. These results support only one of the two conflicting experimental measurements reported in the literature.