Dissociative attachment of electrons to vibronically excited SO2

Dissociative electron attachment (DEA) to vibronically excited SO2 in the Clements' band in the 288 to 298 nm region has been studied. The O- ion yield, to a first approximation, follows the photo absorption spectrum in this range indicating the DEA process to be independent of the vibrational levels in this band. This is in contrast to what is generally observed for vibrational level dependence from the electronic ground state. The current measurements also do not show any qualitative change in the dissociative attachment process due to change of symmetry as one moves from the peaks to the valleys of the Clements band