The fragmentation of core ionized CF4 probed by threshold-photoelectron-photoion-photoion coincidence (TPEPIPICO) spectroscopy

The ionization and fragmentation of carbon tetrafluoride excited at the C and F 1s thresholds are studied using soft x-ray excitation, threshold electron spectroscopy and state-selective coincidence techniques. The threshold electron spectra reveal indirect low-energy production from pre-edge resonances, and the structure at the thresholds is attributable to post-collision interaction effects, with some evidence of underlying vibrational structure. The coincidence data allow determination of ion and ion pair yield ratios and deduction of the dissociation pathways and final states for the various channels.