Electron attachment and vibrational excitation in hydrogen iodide: calculations based on the nonlocal resonance model

Abstract

The nonlocal resonance model developed earlier for the description of the collision of low-energy electrons with HCl and HBr has been adapted to the electron-HI collision system. The parameters of the model have been determined by fitting experimental high-resolution data for the attachment cross section in HI in the energy range 0 - 170 meV. Moreover, ab initio electronic-structure data for the electronic ground-state potential-energy function of HI- have been taken into account. Within the resulting model, cross sections for vibrational excitation and dissociative attachment processes in HI and DI have been calculated over a reasonably wide energy range. No high-resolution experimental data are available for comparison.