Integral and differential elastic collision cross-sections for low-energy Ar + ions with neutral Ar atoms

Abstract

Integral and differential elastic collision cross-sections for Ar + ions with neutral Ar atoms are calculated using modified Tang and Toennies ion–atom interaction potential models, TTIA and TTIA-wb, to describe experimental spectroscopic data for the Ar 2 + molecular ion, and the phase shifts are calculated by the JWKB approximation. Results are presented for center-of-mass energies in the 1 meV to 10 eV range. In our calculations, the effects of the spin–orbit interaction are included through a semi-empirical model. The results obtained agree with the scarce data available in the scientific literature.