Abstract
Formation of triply ionized states upon the creation of $4d$ inner-shell holes in atomic Hg is investigated by using synchrotron radiation of 730 eV photon energy and a versatile multielectron coincidence detection technique in combination with multiconfiguration Dirac-Fock calculations. By carefully selecting Coster-Kronig electrons detected only in coincidence with a $4d$ photoelectron, the Coster-Kronig spectrum has been extracted and the corresponding branching ratios of the $4d$ hole have been determined. The results are found to differ from previously established experimental ratios based on electron impact ionization but to agree now better with theory. We also present an Auger cascade analysis of pathways leading to triply ionized states of atomic Hg upon removal of a $4d$ inner-shell electron.
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