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arXiv · 2405.06427

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

J. Zs Mezei·R. D. Backodissa-Kiminou·D. E. Tudorache·V. Morel·K. Chakrabarti·O. Motapon·O. Dulieu·J. Robert·W. -Ü. L. Tchang-Brillet·A. Bultel·X. Urbain·J. Tennyson·K. Hassouni·I. F. Schneider
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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.

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J. Zs Mezei, R. D. Backodissa-Kiminou, D. E. Tudorache, V. Morel, K. Chakrabarti, O. Motapon, O. Dulieu, J. Robert, W. -Ü. L. Tchang-Brillet, A. Bultel, X. Urbain, J. Tennyson, K. Hassouni, I. F. Schneider. 2024-05-10. Dissociative recombination, and vibrational excitation of CO$^{+}$: model calculations and comparison with experiment. https://doi.org/10.1088/0963-0252%2F24%2F3%2F035005

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