Resonant 3 s photoemission and resonant 2 p3 p3 p auger of CaF 2

Abstract

A theoretical description is given of the 3 s resonant photoemission and the 2 p3 p3 p (= L 2,3 M 2,3 M 2,3) resonant Auger channels in CaF 2. The importance of quantitative analysis is demonstrated and it is shown that the 2 p3 p3 p Auger spectra excited at the 2 p X-ray absorption edge do show a large variation if one scans through the edge and excites the different possible symmetry states. These variations are observed in a recent resonant Auger experiment ( Phys. Rev. B47, 11736 (1993)); the experiment is reproduced in detail. The analysis shows that the Auger spectra of CaF 2 are completely dominated by the resonance channel, with little contribution of the “normal” Auger channel reached via Coster-Kronig relaxation of the 2 p core hole.