Afanasyev, V. P.Efremenko, D.S.Lubenchenko, A. V.Vos, MaartenWent, Michael2020-12-202020-12-202213-3437http://hdl.handle.net/1885/218695REELS spectra of the electrons reflected off niobium are measured with energy resolution <0.5 eV within the 5-40 eV energy range of the probing beam. The measurements were performed for the scattering angles θ=45° and θ=120° by means of two electron guns. The process of energy losses is described within the framework of a model with three different energy loss laws: surface, intermediate, and bulk layers are considered. Differential cross-sections of inelastic scattering are represented in the form of simple equations.application/pdfen-AUKeywords: Differential cross-sections; Energy loss; Energy ranges; Energy resolutions; Energy spectra; Probing beams; Scattering angles; Atomic spectroscopy; Electron beams; Electron guns; Energy dissipation; Inelastic scattering; Niobium; Electron energy loss spec201010.3103/S10628738100201522020-12-06