Photoionization and Rydberg states of N2

Abstract

The frequencies and intensities of transitions to Rydberg levels, the direct photoionization cross section, and the angular distribution of photoelectrons of N₂ have been calculated for processes associated with N⁺₂(X ²Σ⁺_g) and N⁺₂(A ²Π_u). The theoretical model is based on a Hartree–Fock wavefunction for the ground state of N₂, and excited state wavefunctions derived from an irreducible‐tensorial one‐center representation of the effective potential of the N⁺₂ core. The calculations were carried out for several internuclear distances, especially to try to interpret the dependence of the angular distribution on the final vibrational state.