On the core-hole photoelectron satellites in N2 and CO

A theoretical study is given of core-level photoelectron satellites with special emphasis on the π?π* satellites in N₂ and CO. The discussion is based on an analysis of the properly constructed zeroth-order manifold of satellite states, and provides simple explanations for both bound state and photoelectron continuum aspects of core-level ionization. Similar to the frozen core static exchange approximation for the single core-hole states, we derive one-particle scattering potentials for the satellite states.