Synchrotron radiation study of vibrationally resolved partial photoionization cross sections of CO2 between 64 and 80 nm

Abstract
Vibrationally resolved partial photoionization cross sections of CO2 have been measured for the X̃ 2Πg ionic state for wavelengths between 64 and 80 nm and for à 2Πu and B̃ 2Σ+u from 64 to about 2 nm below the respective thresholds. The autoionization of the Rydberg series converging to à and those converging to B̃ is discussed in terms of population of two vibrational levels of the ground electronic state of the ion. The Rydberg series with limit at C̃ 2Σ+g (000) are shown to decay mainly to B̃ 2Σ+u in its (000) and (100) vibrational levels and to a lesser manner to X̃ 2Πg. They do not populate the à 2Πu state.