TRANSLATIONAL TO VIBRATIONAL AND ROTATIONAL (T-]V,R) ENERGY-TRANSFER AND REACTIVE EXCHANGE COLLISIONS OF H(D)-RANGE FROM 1 TO 2 EV BY TIME-RESOLVED FOURIER-TRANSFORM SPECTROSCOPY(HF(DF) IN THE ENERGY)

The product state distributions for hot atom collisions of H(D) with H F(DF) with a broad range of collision energies between 1.2 eV and 2.3 eV are measured with time-resolved Fourier transform spectroscopy and rotational resolution under multiple collision conditions. In most cas es the vibrational distributions of reactive and nonreactive channels can be distinguished, All rotational distributions have a similar appe arance with a maximum at J=5 and an additional pronounced higher compo nent, which cannot be described by a single Boltzmann distribution. Th e results are compared with recent three dimensional quasiclassical tr ajectory calculations (accompanying paper by Schatz) by applying a mul tiple collision model for both the H(D) atom slowdown and the rotation al and vibrational relaxation. The rotational distributions can also b e interpreted by a three dimensional asymmetric breathing ellipsoid mo del. (C) 1997 American Institute of Physics.