Slice imaging of the quantum state-to-state cross section for photodissociation of state-selected rovibrational bending states of OCS (v2=0,1,2/JlM)+hnu-->CO(J)+S(1D2)

Using hexapole quantum state-selection of OCS (v2 =0,1,2∫JlM) and high-resolution slice imaging of quantum state-selected CO (J), the state-to-state cross section OCS (v2 =0,1,2∫JlM) +h→CO (J) +S (D21) was measured for bending states up to v2 =2. The population density of the state-selected OCS (v2 =0,1,2∫JlM) in the molecular beam was obtained by resonantly enhanced multiphoton ionization of OCS and comparison with room temperature bulk gas. A strong increase of the cross section with increasing bending state is observed for CO (J) in the high J region, J=60-67. Integrating over all J states the authors find (v2 =0): (v2 =1): (v2 =2) =1.0:7.0:15.0. A quantitative comparison is made with the dependence of the transition dipole moment function on the bending angle. © 2007 American Institute of Physics.