The RgI2 (ion-pair states) van der Waals complexes

This paper is an overview of our recent experimental investigations of the RgI₂ van der Waals complexes, Rg = He, Ar, Kr, performed by means of laser induced fluorescence spectroscopy, optical-optical double resonance and supersonic molecular beam techniques. Spectroscopic parameters of these complexes in the E0 _g ⁺ ion-pair state, such as binding energies and several spectroscopic constants, have been determined. Most likely, the potential energy surfaces of the all RgI₂(E) complexes under study present T-shaped minima. Vibrational and electronic predissociations of the RgI₂(E) complexes were analyzed. Relative contributions of the different electronic predissociation channels and vibrational distributions of the decay products were determined. Possible mechanisms of the complexes decay are suggested and discussed.