Non-adiabatic bending dissociation of OCS: the effect of bending excitation on the transition probability

The UV photodissociation dynamics of OCS starting from the bending excited (0 1 0) state was compared to that from the ground vibrational state (0 0 0). The rotational distribution of CO(X1Σ+) was measured by (2+1) resonance enhanced multiphoton ionization, in which dissociations from the two different initial states were discriminated from the translational energies of the CO fragments. Quantitative analysis revealed that the non-adiabatic transition probability in dissociation starting from (0 1 0) was 0.21 that is similar to but slightly smaller than the value, 0.34, from (0 0 0).