Multiplet effects on the shape of the 3p photoelectron spectrum of atomic Ni

Abstract

The 3p photoelectron spectrum and the corresponding M-2.3 Auger spectrum of atomic Ni have been measured with the use of monochromatized synchrotron radiation and atomic beam technique. The thresholds of the direct 3p photoionization have been determined. In order to interpret the complex 3p(-1) multiplet structure calculations were performed taking into account the initial states of both configurations 3d(8)4s(2) and 3d(9)4s and the LS-term dependence of the Ni 3p core-hole lifetimes. The strong influence of both the 3p-3d exchange interaction and the term dependent lifetime broadening by super-Coster-Kronig decays on the shape of the 3p photoelectron spectrum is demonstrated. [S1050-2947(99)03810-X].