Photoionization of the oxygen diatomic molecule

The configuration-average distorted wave method is applied to the calculations of the photoionization of O₂. The total cross section includes the outer 3dπ² shell with an ionization potential of 14.5 eV and the next outer 2pπ⁴ shell with an ionization potential of 19.2 eV. The theoretical cros sections are compared to the experimental resutls of JA Fennelly and DG Torr.