Dissociative recombination of CH\(^+\) molecular ion induced by very low energy electrons

We used the multichannel quantum defect theory to compute cross sections and rate coefficients for the dissociative recombination of CH\(^+\) initially in its lowest vibrational level \(v_i^+ = 0\) with electrons of incident energy bellow \(0.2\) eV. We have focused on the contribution of the \(2\)...

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Bibliographic Details
Published in:arXiv.org 2022-03
Main Authors: Mezei, J Zs, M D Epée Epée, Motapon, O, Schneider, I F
Format: Article
Language:English
Subjects:
Boltzmann distribution
Cross-sections
Electrons
Mathematical analysis
Molecular ions
Rotational states
Online Access:Get full text
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Summary:We used the multichannel quantum defect theory to compute cross sections and rate coefficients for the dissociative recombination of CH\(^+\) initially in its lowest vibrational level \(v_i^+ = 0\) with electrons of incident energy bellow \(0.2\) eV. We have focused on the contribution of the \(2\) \(^2\Pi\) state which is the main dissociative recombination route at low collision energies. The final cross section is obtained by averaging the relevant initial rotational states \((N_i^+ = 0,\dots,10)\) with a \(300\) K Boltzmann distribution.The Maxwell isotropic rate coefficients for dissociative recombination are also calculated for different initial rotational states and for electronic temperatures up to a few hundred Kelvins. Our results are compared to storage-ring measurements.
ISSN:2331-8422
DOI:10.48550/arxiv.2203.03484