RESONANT 3S PHOTOEMISSION AND RESONANT 2P3P3P AUGER OF CAF2

A theoretical description is given of the 3s resonant photoemission and the 2p3p3p (= L(2,3)M(2,3)M(2,3)) resonant Auger channels in CaF2. The importance of quantitative analysis is demonstrated and it is shown that the 2p3p3p Auger spectra excited at the 2p 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 CaF2 are completely dominated by the resonance channel, with little contribution of the ''normal'' Auger channel reached via Coster-Kronig relaxation of the 2p core hole.