Elastic peak electron spectroscopy using a retarding field analyser (RFA) proved to be an efficient tool for several applications. The advantage of RFA lies in its simultaneous LEED-AES application, in its large aperture averaging angular effects and in the possibility of surface analysis with the elastic peak. The difficulty of the RFA is its poor energy resolution integrating also the background adjacent to the peak observed (elastic or Auger peak) and producing peak distortion. Spectrometer correction was made by determining the spectral distribution function of the RFA energy window, using an approach of sum of Gaussians. Parameters of the Gaussian functions have been determined by decomposition of elastic peak spectra measured with an RFA Riber OPR-304 on Ag. Ag and Au elastic peaks at 1 and 2 keV energy were compared with highly resolved spectra obtained with a hemispherical analyser. Calculated elastic peak spectra exhibited reasonable agreement with experimental data obtained with the RFA spectrometer.
ASJC Scopus subject areas
- Physics and Astronomy(all)