REACTIONS OF VELOCITY-ALIGNED ATOMS PROBED BY DOPPLER PROFILES - H-2-]OH+O(O)

Final state resolved vector properties of the reaction H (S-2)+O-2((3) Sigma(g)(-))-->OH((II)-I-2)+O(P-3) have been measured using Doppler s pectroscopy. Velocity-aligned H atoms were generated by photodissociat ion of H2S with linearly polarized ArF excimer laser light. The correl ated velocity and angular momentum distribution of nascent OH reaction products was probed by laser induced fluorescence. Techniques are des cribed for analyzing the line shapes, modeling the bipolar moments of the OH velocity and angular momentum distribution as parametric functi ons of the scattering angle. Distinctive Doppler-broadened lineshapes indicate scattering angle distributions with a strong forward and a we aker backward maximum. A qualitatively different angular momentum pola rization for the two lambda doublet components of the OH product is re quired to explain the Doppler profiles.