Multiple photoionization for the K shell in the Fe atom

Abstract

Multiple photoionization for the K shell in the Fe atom is studied for all levels of the ground configuration. The study shows that sextuple-photoionization cross sections dominate for all levels of the 3d64s2 configuration. The cross sections strongly depend on the initial level for which the photoionization is investigated. The partial photoionization cross sections to the configurations of the produced ions are determined. The main sequences of the radiative and Auger cascade following the photoionization of the K shell in the Fe atom are identified. Presented ion yields for subconfigurations and levels are compared with the previous calculations for configuration averages, revealing that they strongly overestimate ion yields for the Fe7+–Fe10+ ions.