Fourfold excitations, intra- and inter-shell correlations in the Auger decay of Kr 3d-np resonances

Abstract

Many-electron effects in the photoionization of Kr near the 3d9np resonances were investigated theoretically. Cross sections for the population of the 4p4(1D)mp states, their alignment and orientation, and angular distribution of the Auger electrons were computed considering the resonance Auger effect as a coherent process. Probabilities of the radiative cascades following the resonant Auger effect were estimated quantitatively within the transition-array technique. The role of intra- and inter-shell correlations was investigated. Lineshapes computed, taking into account interchannel interaction, are in good agreement with the measured ones. Fourfold excitations of the Kr ground state were proposed to influence the resonance population, alignment and orientation of the 4p4np levels.