The H+N2O -> OH((2)Pi(Omega), v ', N ')+N-2 reaction: the microscopic mechanism at 1.5 eV

OH state-resolved angular scattering and kinetic energy release distributio ns for the reaction H + N2O --> N-2 + OH have been determined for the OH pr oducts born in the upper (2)Pi(1/2) spin-orbit state. Also presented are OH spin-orbit population propensities, and OH quantum state-resolved energy d isposal data. The scattering dynamics show no sign of a dependence on OH sp in-orbit state, despite a two-fold preferential population in favour of the lower OH spin-orbit state. The new data are discussed in the light of our own previous studies of the title reaction generating ground spin-orbit sta te OH products, and in the light of studies by other workers. Particular in sight about the reaction mechanism is provided by the comparison with the p hotodissociation dynamics of HN3. The comparison is especially useful in ai ding the interpretation of the OH quantum state dependence of the angular s cattering distributions in the H + N2O reaction.