A TRAJECTORY SURFACE-HOPPING STUDY OF CHEMICAL-REACTION AND COLLISION-INDUCED DISSOCIATION IN THE HD++HE SYSTEM

A trajectory surface-hopping study of collisions of HD+(v)+He for v=0-4 has been carried out on the two lowest potential energy surfaces at relative collision energies of 1, 2, 4, 8, and 20 eV. The procedure was similar to our earlier study of H-2+ + He. Total cross sections are reported for chemical reaction to produce HeH+ and HeD+ and for collision-induced dissociation to give H+ and D+. This is the first low energy calculation which is capable of distinguishing H+ from H and D+ from D in the dissociation process. The results are compared with other theoretical and experimental work on this system.