Resonance-mediated chemical reaction: F+HD-->HF+D
Conclusive evidence is presented for the existence of a reactive resonance in the F+HD reaction. In a molecular beam experiment, the resonance appears in the integral cross section as a distinct steplike feature, while in the differential cross section it is manifested as sharply varying forward-backward peaks in the product distribution. A detailed analysis of the quantum dynamics establishes that a reactive resonance localized in the transition-state region is responsible for these remarkable observations. At collision energies below 1 kcal/mol, the reaction proceeds almost exclusively through resonant tunneling with very little contribution from the more conventional direct mechanism.
Skodje
RT
Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan 106, Republic of China and Department of Chemistry, University of Colorado, Boulder, Colorado 80309.
Skouteris
D
Manolopoulos
DE
Lee
SH
Dong
F
Liu
K