DISSOCIATIVE PHOTOIONIZATION OF HEXACARBONYL TUNGSTEN IN THE RANGE 30-120EV

Dissociative photoionization of W(CO)(6) has been studied in the photo n energy range 38-130eV by use of time-of-flight (TOF) mass spectromet ry and photoion-photoion coincidence (PIPICO) method combined with syn chrotron radiation. From the TOF mass spectra, both the fragment ions resulting from the loss of CO ligands only and those resulting from th e CO loss and additional cleavage of C-O bond in the ligand are identi fied. Doubly charged ions of both of these types are abundant above ab out 40 eV. It has been found that the relative abundance of doubly cha rged parent ions increases with increasing incident photon energy. On the other hand the PIPICO measurements reveal the dissociation of trip ly charged molecular ions into doubly and singly charged ion pairs, as well as into three singly charged fragments.