Effect Of Collision Energy On The Stereodynamics Of The Reaction K(S-2)+Hf(X-1 Sigma(+)) -> Kf(X-1 Sigma(+))+H(S-2)
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE(2021)
Abstract
The stereodynamics of the atom-molecule reaction K(S-2)+HF(X-1 Sigma(+)) -> KF(X-1 Sigma(+))+H(S-2) was studied using quasi-classical trajectory method based on the potential energy surface constructed by Says et al. Four generalized polarization-dependent differential cross-sections [(2 pi/sigma) (d sigma(00)/dw(t)), (2 pi/sigma) . (d sigma(20)/dw(t)), (2 pi/sigma) (d sigma(22)/dw(t)), (2 pi/sigma) (d sigma(21)/dw(t))], the distributions function P(theta(r))] , the dihedral angle distribution function [P(phi(r))] and the polar distriloution function [P(theta(r) ,phi(r)) ] are studied in detail. The results show that the rotational angular momentum j' of the product KF is not only strongly aligned along the direction perpendicular to k, but also oriented along the negative direction of the y axis. The orientation of j' depends very sensitively on the collision energy.
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Key words
Stereodynamics, Quasi-classical trajectory, Vector correlation, Collision energy effect
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