The interatomic potential for the X¹Sigma state of ArLi⁺

Abstract

An extended group function model has been applied to determine the interatomic potential for the X1 Sigma state of ArLi+. By adopting a (14s, 10p, 7d, 4f, 1g/7s, 5p, 3d, 2f, 1g) contracted Gaussian type basis set, the following potential minimum parameters are obtained: Re=4.50 au and De=10.569 mHartree. On the basis of an error analysis it is concluded that the calculated binding energy is in error by no more than 0.3%. The accuracy of the potential is superior to previously determined potentials.