Dissociative recombination of the CH${}^{+}$ molecular ion at low energy

Abstract

The reactive collisions of the CH${}^{+}$ molecular ion with electrons is studied in the framework of the multichannel quantum defect theory, taking into account the contribution of the core-excited Rydberg states. In addition to the $X^1{\Sigma }^{+}$ ground state of the ion, we also consider the contribution to the dynamics of the $a^3\Pi$ and $A^1\Pi$ excited states of CH${}^{+}$. Our results - in the case of the dissociative recombination in good agreement with the storage ring measurements - rely on decisive improvements - complete account of the ionisation channels and accurate evaluation of the reaction matrix - of a previously used model.

arXiv comment8 pages, 8 figures

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• On the validity of the Born-Oppenheimer approximation in the indirect dissociative recombination process
• Electron collision studies on the CH${}_2^{+}$ molecular ion