Valence and core level ionization of the CCl4 molecule

Dissociation processes of the CCl4 molecule excited in the valence, Cl 2p, and C 1s core levels have been studied using the photoelectron-photoion (PEPICO) coincidence technique combined with synchrotron radiation. Doubly and triply charged fragments not previously reported have been observed. Kinetic energy releases for the fragments have been estimated using the peak width method. In the PEPICO spectra an increasing broadening in the peak widths has been observed as function of the incident photon energy, indicating the repulsive role played by the σ* orbital.