Electron-Impact Dissociation of Vibrationally-Excited Molecular Hydrogen into Neutral Fragments

Abstract

We present convergent close-coupling (CCC) calculations of electron-impact dissociation of vibrationally-excited molecular hydrogen into neutral fragments. This work follows from our previous results for dissociation of molecular hydrogen in the ground vibrational level [Scarlett et al., Eur. Phys. J. D 72, 34 (2018)], which were obtained from calculations performed in a spherical coordinate system. The present calculations, performed utilizing a spheroidal formulation of the molecular CCC method, reproduce the previous dissociation cross sections for the ground vibrational level, while allowing the extension to scattering on excited levels.

Isotopic and vibrational-level dependence of H$_2$ dissociation by electron impact

“…We will argue in favour of the MCCC results, which will be of some interest to those who have previously recommended the R-matrix data [26,27,32,33] or implemented it in their models [1][2][3][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48]. We limit the discussion here to dissociation through the b 3 Σ + u state, but note that we have previously [49] performed more detailed dissociation calculations for vibrationally-excited H 2 including all im-portant pathways to dissociation into neutral fragments from low to high incident energies. These calculations can be readily extended to include the isotopologues in the future.…”