Photoelectron spectra and partial photoionization cross-sections for carbon dioxide

Abstract

A photoelectron spectrometer has been used to determine partial photoionization cross-sections for carbon dioxide for monochromatic incident radiation throughout the wavelength range 584–720 Å. Transitions to particular states of the CO + 2 ion were identified by measuring the photoelectron energy. Transitions to the 2π g , 2π u , 2Σ + u and 2Σ + g states of CO + 2 were observed at all photon energies for which they were energetically allowed. Partial cross-sections for the production of each of these ionic states have been determined as a function of photon wavelength.