Unified treatment of resonant and non-resonant mechanisms in dissociative recombination: benchmark study of CH${}^{+}$

Abstract

The theoretical approach developed here treats uniformly the direct and indirect mechanisms of dissociative recombination (DR) in a diatomic ion. The present theory is based on electron scattering calculations performed at several internuclear distances in the molecule. It is easy to implement becaus there is no need to separately evaluate couplings and the bound dissociative states of the neutral molecule. The theory can be applied to molecular ions with or without electronic resonances at low energies. The approach is applied to compute the DR cross section in electron-CH${}^{+}$ collisions. The computed cross section agrees generally well with recent state-resolved data from a cryogenic storage-ring experiment, which validates the approach.

References in corpus (6)

• Inelastic low-energy collisions of electrons with HeH${}^{+}$: rovibrational excitation and dissociative recombination
• Dissociative recombination of cold HeH${}^{+}$ ions
• ab initio frame transformation calculations of direct and indirect dissociative recombination rates of HeH+ + e-
• Experimental determination of the dissociative recombination rate coefficient for rotationally-cold CH${}^{+}$ and its implications for the diffuse cloud chemistry
• Dissociative recombination of CH${}^{+}$ molecular ion induced by very low energy electrons
• Dissociative recombination of the CH${}^{+}$ molecular ion at low energy

Cited by in corpus (3)

• Dissociative Recombination of Rotationally Cold OH${}^{+}$ and Its Implications for the Cosmic Ray Ionization Rate in Diffuse Clouds
• Bound and autoionizing potential energy curves in the CH molecule
• Dissociative Recombination of CF${}^{+}$