TRIPLET-STATE ENERGY-LEVELS OF CO-2(2+), COS2+ AND CS-2(2+)

Double-charge-transfer spectroscopy has been used to measure the energies of triplet states of CO2(2+), COS2+ and CS2(2+) up to approximately 15, 13 and 9 eV, respectively, above the ground-state energies. In addition, the double-ionization energies have been calculated using Moller-Plesset perturbation theory with split-valence basis sets and are in excellent agreement with the measured values. The excited triplet state energies correlate well with values calculated in a previous investigation, and an assignment of these states is reported. Other experimental data on these dications have been reviewed and an assignment of these data is also described.