H-0-2 AND H-0+O-2 COLLISIONS AT LOW KILO-ELECTRON-VOLT ENERGIES(H)

Small-angle H-0+H-2 and H-0+O-2 collisions are studied at energies of 1.0, 2.0, and 3.0 keV. Time-of-flight techniques are used to identify the dominant direct scattering (-->H-0) processes. The stripping (-->H +) and electron capture (-->H-) channels are identified by electrostat ic energy analysis: The probabilities and reduced differential cross s ections for the dominant processes are determined as a function of tau (=E0), the reduced scattering angle. This is found to be a useful var iable for plotting the probabilities and reduced cross sections for th e processes studied, since the results at the different energies gener ally lie on common curves. The electronically inelastic processes are found to dominate the collision for tau>0.2 keV deg in H+H-2 and tau>0 .3 keV deg in H+O-2. The stripping process in H-2 primarily results in H+ +H-2(X)+e(-) while the H++O-2(-) channel is found to dominate the small-angle stripping in O-2.