The OH product state distribution from the reaction O( 'D) + H, (u) -OH( u",J "&A) + H was determined by laser-induced fluorescence (LIF) in the ho = -3 band for v" = 3 and 4 with resolution of the J ", Q and A sublevels. The rotational state population distribution is inverted strongly in U" = 3, weaker in v" = 4. There is a higher propensity for production of OH in the Il (A ') A-sublevels. Vibrationally excited H, was used for a part of the experiments. Excitation was achieved by stimulated

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... aman pumping (SRP) . The population ratio of the vibrational states was determined to be P( v = 3)/P( v = 4) = 3.5 for the reaction with H, (U = 0) and 3.0 when there is H, (u = 1) in the reaction chamber. Higher OH product states are populated than it would be expected from the mean available energy of the reaction. The translational energy of the reactants is transferred into OH rotation. 7490