Asymmetric peaks of photoelectrons and Auger electrons formed through post-collision interaction following Kr 2p_3/2hole creation

Abstract

Asymmetric and broadened peaks for the 2p3/2 photoelectron and normal Auger electrons of L3M45M45 decays in Kr have been measured using monochromatized undulator radiation and a hemispherical electron energy analyser. Just above the ionization threshold, the photoelectron shows a tailing into lower energies and the normal Auger line of the 1G4 final state exhibits a tailing into higher energies. This finding that the tailings mirror each other originates from the post-collision interaction effect; that is, the slower photoelectron is overtaken by the normal Auger electron. Away from the threshold the tailing width and the shift of the Auger peak decrease, approaching a Lorentzian peak structure.