Curve fitting of Cr 2p photoelectron spectra of Cr2O3 and CrF3

Chromium (III) 2p photoelectron spectra show strong satellites on the high-binding-energy side of the main photoelectron peaks, In the case of Cr 2p spectra, the satellite of the Cr 2p(3/2) peak strongly overlaps the Cr 2p(1/2) peak, As a result, a virtual three-peak spectrum is obtained, In order to analyse the spectral features of the Cr 2p photoelectron peaks, we propose a fitting formalism for Cr(III) 2p spectra that is consistent with a relaxation model, This model allows for the possibility of two different final-state screening conditions of the photoinduced core hole, Considering these two final states, Cr 2p spectra basically can be interpreted by a superposition of two 2p doublets, X-ray contributions arising from the K alpha(3,4) lines were also taken into account, as well as the existence of OH groups on the surface of Cr2O3 samples. Additionally, a rather pragmatic approach for fitting the Cr L(3)M(23)V Auger spectral region was used to obtain further spectral parameters (e.g. alpha) that do not depend on charging.