Resonant states and photodissociation cross sections in protonated rare gases

Highly accurate interaction potential functions obtained earlier by us for NeH+ and ArH+ have been used to compute the entire manifold of quasibound states within a given range of possible widths. Semiclassical and quantal methods were employed and compared for both diatomics, showing very good accord with each other. General dipole functions are then extracted from a combined use of ab initio and model calculations, and employed to evaluate transition moments and then used to compute theoretical photodissociation cross sections and asymmetry parameters β(E). Resonant dissociation widths and positions are finally compared with the same quantities from the direct predissociative process and results are discussed vis à vis possible experiments on the present systems.