E. Wrede et L. Schnieder, ON THE APPEARANCE OF RESONANCES IN REACTIVE SCATTERING - AN EXPERIMENTAL-STUDY OF THE H-2-]HD+D REACTION AT COLLISION ENERGIES NEAR 1.29 EV(D), The Journal of chemical physics, 107(3), 1997, pp. 786-790
The hydrogen exchange reaction H+D-2(v=0,j=0)-->HD(v',j')+D was invest
igated at collision energies between 1.27 and 1.30 eV in a high resolu
tion crossed beam experiment. The angle-velocity distribution of nasce
nt D-atoms was measured using the technique of Rydberg atom time-of-fl
ight spectroscopy. The resolution of this technique allows the identif
ication of individual ro-vibrational states of the associated HD produ
ct molecule. Calculations done on the Liu-Siegbahn-Truhlar-Horowitz (L
STH) potential energy surface (PES) explicitly including the Geometric
Phase effect predict a resonance in reactive scattering for collision
energies close to 1.29 eV. The experimental data do not show signatur
es of this resonance in the energy range investigated. Instead of this
a general good agreement between experiment and theory even on the ba
sis of state-to-state differential cross sections is already found for
calculations on the LSTH PES at a collision energy of 1.30 eV not inc
luding the Geometric Phase indicating that this effect does not play a
n important role at these collision energies. (C) 1997 American Instit
ute of Physics.