Quantum Dynamics Study of $H$ Exchange Reaction of $H'(^2S) + CH(X^2\Pi) → H(^2S) + CH'(X^2\Pi)$ and Isotope Reactions of $H(^2S)+CH(X^2\Pi)→C(^1D)+H_2(X^1\sum^+_g)$
Year: 2015
Author: Yunhui Wang, Kaiming Deng, Ruifeng Lu
Journal of Atomic and Molecular Sciences, Vol. 6 (2015), Iss. 1 : pp. 11–22
Abstract
By using the time-dependent quantum wave packet method, we report a detailed dynamics study of H exchange reaction $H'(²S) + CH(X²\Pi) → H(²S) + CH'(X²\Pi)$ and the isotope effects of $H(²S) + CH(X²\Pi) → C(¹D) + H_2(X¹Σ^+_g)$ reaction on the 11A BHL potential energy surface. The reaction probabilities and integral cross sections have been obtained for the initial states $v = 0$ and $j = 1$ of the reactant molecules. The dense resonance structures in the reaction probabilities at all total angular momentums indicate complex-forming mechanisms for both $C + H_2$ and $H + CH$ products. A comparison between the results from centrifugal sudden approximation and those from close-coupled calculations demonstrates that the Coriolis coupling effects get more and more pronounced with increasing of $J$ for both $H$ exchange reaction and $CH$ decay reaction. The isotopic $D$ substitution of reactant significantly influences the $CH$ decay reaction. Moreover, it is revealed that the dynamical features such as partial wave contributions to the cross section are substantially different for these two channels.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/10.4208/jams.123014.021515a
Journal of Atomic and Molecular Sciences, Vol. 6 (2015), Iss. 1 : pp. 11–22
Published online: 2015-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 12
Keywords: time-dependent quantum wave packet isotope effects stereodynamics.