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arXiv · 1702.07777

Radiative association of C(${}^3P$) and H${}^+$: Triplet states

James F. Babb·Brendan M. McLaughlin
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Abstract

The radiative association of C(${}^3P$) and H${}^+$ is investigated by calculating cross sections for photon emission into bound ro-vibrational states of CH${}^+$ from the vibrational continua of initial triplet d$\,{}^3Π$ or b$\,{}^3Σ^-$ states. Potential energy curves and transition dipole moments are calculated using multi-reference configuration interaction (MRCI) methods with AV6Z basis sets. The cross sections are evaluated using quantum-mechanical methods and rate coefficients are calculated. The rate coefficients are about 100 times larger than those for radiative association of C${}^+({}^2{P^o})$ and H from the A$\,{}^1Π$ state. We also confirm that the formation of CH${}^+$ by radiative association of C${}^+({}^2{P^o})$ and H via the triplet c$\,{}^3Σ^+$ state is a minor process.

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James F. Babb, Brendan M. McLaughlin. 2017-03-10. Radiative association of C(${}^3P$) and H${}^+$: Triplet states. https://doi.org/10.1093/mnras%2Fstx630

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