THE PHOTODISSOCIATION OF SIO

The photodissociation of the SiO molecule, which is of considerable as trophysical interest, is studied within the framework of the Floquet t heory. Only the one-photon transition process between the two lowest ( 1) Sigma(+) states is considered. The computation of the electronic en ergy surfaces is performed with the MOLPRO code. The wave operator the ory is used to select the active space related to this process, and to build the Floquet resonance states which constitute this active space . Particular attention is paid to the role of the shape resonance stat es induced by the presence of a barrier on the E (1) Sigma(+) surface. (C) 1997 American Institute of Physics.