Dissociative electron attachment and electron-impact resonant dissociation of vibrationally excited O2 molecules

Abstract

State-by-state cross sections for dissociative electron attachment and electron-impact dissociation for molecular oxygen are computed using ab initio resonance curves calculated with the R-matrix method. When O2 is in its vibrational ground state, the main contribution for both processes comes from the ${}^2{\Pi }_u$ resonance state of $O_2^{-}$ but with a significant contribution from the ${}^4\Sigma$ resonant state. Vibrational excitation leads to an increased contribution from the low-lying ${}^2{\Pi }_g$ resonance, greatly increased cross sections for both processes, and the threshold moving to lower energies. These results provide important input for models of O2-containing plasmas in nonequilibrium conditions.

arXiv comment5 figures

References in corpus (2)

• Electron-impact resonant vibrational excitation and dissociation processes involving vibrationally excited N2 molecules
• Resonant vibrational-excitation cross sections and rate constants for low-energy electron scattering by molecular oxygen

Cited by in corpus (10)

• Uncertainty Estimates for Theoretical Atomic and Molecular Data
• QDB: a new database of plasma chemistries and reactions
• Study of vibrational kinetics of CO2 and CO in CO2-O2 plasmas under non-equilibrium conditions
• Zero-dimensional and pseudo-one-dimensional models of atmospheric-pressure plasma jet in binary and ternary mixtures of oxygen and nitrogen with helium background
• Calculated low-energy electron-impact vibrational excitation cross sections for CO2 molecule
• Vibrational excitation and dissociation of deuterium molecule by electron impact
• Dissociative electron attachment cross sections for ro-vibrationally excited NO molecule and N- anion formation
• Vibrationally resolved NO dissociative excitation cross sections by electron impact
• Electron-impact cross sections for dissociation processes of vibrationally excited CH radical
• Resonant electron attachment to mixed hydrogen/oxygen and deuterium/oxygen clusters