Abstract
Electronic relaxation of atomic Kr below and above the $1s$ ionization threshold is investigated experimentally using hard x-ray photoelectron spectroscopy. The experimental results are interpreted with the aid of relativistic Dirac-Fock calculations. The $1s$ orbital core-hole lifetime is extracted and the satellite's structures accompanying the photoelectron main line are assigned. Auger spectra recorded below and above the $K$ edge are also investigated. In particular, the Auger cascade originating from vacancies of different origin in the $L$ shell is analyzed in great detail. Competition between radiative $KL$ versus nonradiative $KLL$ Auger emission is emphasized.
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