Resonance states of HCl⁻and electron-HCl scattering processes

The stabilisation method is used to compute the resonant states of HCl - . Resonant states of HCl - that dissociate to H - +Cl and Cl - +H are found as well as those that dissociate to H+Cl+e. The totality of these states explain all the known qualitative and threshold features of vibrational excitation, dissociative attachment and associative detachment without doing rigorous electron-polar-molecule scattering computations. The computations were carried out using Gaussian orbitals and SCF+CI methods.