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Zusammenfassung:
The photoelectron spectrum of gaseous CO2 is investigated in the inner valence electron region, between 20 and 45 eV binding energies for photon energies between 40 and 100 eV using synchrotron radiation. The branching ratio for inner valence ionizations increases considerably as a function of photon energy. We identify 12 ion states in this energy range. Some of the ion states show strong variations in relative intensities. The observed spectra cannot be understood on the basis of single-particle considerations. On the basis of many-particle calculations reported in the literature some of the ion states can be assigned.
