Influence of Renner-Teller Coupling between Electronic States on H + CO Inelastic Scattering

The Journal of Physical Chemistry. a
Steve NdenguéHua Guo

Abstract

We examine the excitation of carbon monoxide from its rovibrational ground state via collisions with a hydrogen atom. Calculations employ the Multi-Configuration Time-Dependent Hartree method and treat the nonadiabatic dynamics with the inclusion of both the ground and the Renner-Teller coupled first excited electronic states. For this purpose, a new set of recently presented global HCO Potential Energy Surfaces (PESs) that cover the 0-3 eV range of energy is used. The results obtained here considering only the ground state (without the Renner-Teller coupling) are in qualitative agreement with those available in the literature. The Renner-Teller effect is known to have an important effect on the spectroscopy of the system, and its inclusion and effects on the dynamics for the processes described in this paper are fairly significant also. The results of this study indicate that for certain very particular initial conditions rather dramatic effects can be observed.

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Citations

Mar 6, 2021·Physical Chemistry Chemical Physics : PCCP·Cheikh T BopRichard Dawes
Jul 29, 2021·The Journal of Physical Chemistry. a·Pablo GamalloCarlo Petrongolo

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