Ionic photofragmentation of SO2 in the sulfur 2p and 2s regions

Ionic photofragmentation of SO2 in the sulfur 2p and 2s regions has been investigated using monochromatic synchrotron radiation. Multi-stop time-of-flight mass spectrometry was used to collect photoelectron-photoion coincidence (PEPICO), photoion-photoion coincidence (PIPICO) and photoelectron-photoion-photoion coincidence (PEPIPICO) spectra simultaneously. Partial ion yields and partial ion-pair yields have been determined. Dissociation mechanisms of the productions of ion-pairs O+S+ and O+SO+ have been discussed briefly.