Electron--impact resonant vibration excitation cross sections and rate coefficients for carbon monoxide

TL;DR

This paper calculates electron-impact vibrational excitation cross sections and rate coefficients for all vibrational states of CO in the 0-10 eV energy range, using R-matrix and local complex potential methods, with good agreement to experimental data.

Contribution

It introduces a comprehensive calculation of vibrational excitation cross sections for all CO vibrational states via the 2{\Pi} resonance, incorporating nuclear motion effects.

Findings

Good agreement with experimental data on vibrational excitation from ground state.

Provides excitation rates and cross sections for all initial vibrational levels.

Highlights the importance of the 2{\Pi} resonance in electron-CO scattering.

Abstract

Resonant vibrational and rotation-vibration excitation cross sections for electron-CO scattering are calculated in the 0-10 eV energy range for all 81 vibrational states of CO, assuming that the excitation occur via the 2{\Pi} shape resonance. Static exchange plus polarization calculations performed using the R-matrix method are used to estimate resonance positions and widths as functions of internuclear separation. The effects of nuclear motion are considered using a local complex potential model. Good agreement is obtained with available experimental data on excitation from the vibrational ground state. Excitation rates and cross sections are provided as a functions of the initial CO vibrational state for all ground state vibrational levels.