Abstract
Multiple-charged Kr ions have been studied using monochromatized synchrotronradiation combined with a coincidence technique. The multiple-charged ions formedthrough ionization of the inner sub-shells were detected by a time-of-flight massanalyser and the photoelectrons emitted from those orbitals were observed by acylindrical mirror electron energy analyser. The coincidence measurement betweenthe energy-selected photoelectron and the photoion specified the individualmultiple ionization channels of Kr. The Kr 3d ionization produces doubly andtriply charged ions. The Kr 3p ionization mainly yields triply charged Kr ions viaM23M45N23 Coster–Kronigdecays, and the M23M45N1 decays generate considerably quadruply charged ions. The 3s ionization significantlyproduces quadruply charged ions via super-Coster–Kronig decays with successive Augertransitions.
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