Dissociative recombination, and vibrational excitation of CO${}^{+}$: model calculations and comparison with experiment

Abstract

The latest molecular data - potential energy curves and Rydberg$/$valence interactions - characterizing the super-excited electronic states of CO are reviewed, in order to provide inputs for the study of their fragmentation dynamics. Starting from this input, the main paths and mechanisms for CO${}^{+}$ dissociative recombination are analyzed; its cross sections are computed using a method based on Multichannel Quantum Defect Theory. Convoluted cross sections, giving both isotropic and anisotropic Maxwellian rate-coefficients, are compared with merged-beam and storage-ring experimental results. The calculated cross sections underestimate the measured ones by a factor of $2$, but display a very similar resonant shape. These facts confirm the quality of our approach for the dynamics, and call for more accurate and more extensive molecular structure calculations.

12 pages, 8 figures 5 tables

References in corpus (1)

• Detection of CO+ in the nucleus of M82

Cited by in corpus (4)

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• Dissociative recombination and vibrational excitation of BF${}^{+}$ in low energy electron collisions
• Population of ground and lowest excited states of Sulfur via the dissociative recombination of SH+ in the diffuse interstellar medium