Photoionization Cross Sections for the Ground State Configuration of Atomic Nitrogen and Oxygen

Photoionization cross sections for the ground state configuration of N and O were calculated for photoelectron energies up to 50 eV using the scaled Fermi–Thomas potential method of Stewart and Rotenberg. All outer- and inner-shell transitions contributing to the cross section in this energy range were included. Results are in good agreement with experiment and with results obtained by more elaborate but numerically much slower methods of calculation such as Hartree–Fock–Slater and related methods.