Resonant photoionization for sodiumlike selenium

This paper shows how the photoionization rate for sodiumlike selenium is greatly enhanced by including the two-step process of resonant photoexcitation of an L-shell electron followed by autoionization to the neonlike ground state. The photoionization rates for pumping with various line sources and continuum sources are presented and the direct photoionization rate is shown to be smaller than the resonant photoexcitation-autoionization rate for many different photon sources.