Nascent rotational and vibrational distributions in 16OH and 18OH produced in the reaction of O(1D) with H2 18O

Rotational and vibrational state distributions of the OH radicals produced in the reaction 16O(1D) + H2 18O → 16OH + 18OH have been determined using a laser-induced fluorescence technique. 16O(1D) was prepared by the 193 nm photodissociation of N2O. The rotational distributions for 16OH and 18OH in the v = 0 level are characterized by the Boltzmann temperatures of 6000 and 2600 K, respectively. A considerable amount of 16OH exists in the v = 1 state while 18OH was produced predominantly in the v = 0 state.