Probing Feshbach resonances in F+H2(j=1)→HF+H:: Dynamical effect of single quantum H2-rotation

Full quantum state resolved scattering of the F atom reaction with H-2(j=0) and H-2(j=1) was investigated at the collision energies of 0.19 and 0.56 kcal/mol. Dramatic difference between the dynamics for the F+H-2(j=0,1) reactions at both collision energies have been observed. Forward scattering HF(v(')=2) products have been observed unambiguously for the F+H-2(j=1) reaction at low collision energies, which was attributed to the Feshbach resonances. This study provides a unique case of reaction resonances involving a rotationally excited reagent. (c) 2006 American Institute of Physics.