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The angular and energy distributions of backscattered electrons for the primary energies of 0.2, 0.5 and 1keV and for Cu and Au were calculated by Monte-Carlo method and compared to measurement. The elastic differential cross-sections were calculated by ELSEPA code. For inelastic scattering a modified Tougaard's model of universal cross-section was used. We fit inelastic mean free path (IMFP) obtained...
Recently, a review of APS experimental results on the electron scattering investigation was published. In the frame of this work ultrathin layers were deposited by in situ evaporation on polycrystalline substrates. Ti, Cr, Mn and Ni were chosen as substrates and deposits and APS signal intensities were measured as functions of the overlayer thickness and energy interval of electrons taken into account...
Appearance potential spectroscopy (APS) was introduced in the early seventies as a relatively simple surface sensitive analytical technique. Later, various processes involved in APS signal formation have been investigated making use of sophisticated experimental set-ups. In this way, APS became a possible fool for studying electron transport processes in the surface region of solids. In the experimental...
Ultrathin chromium layers of increasing thickness were deposited on titanium substrates under UHV conditions. AFM was used to check the surface morphology and to optimize the evaporation parameters. In situ AES and APS measurements were performed on these samples. The APS overlayer and substrate signal intensities, as a function of the overlayer thickness, have been measured. Instead of the common...
The information depths of AEAPS and DAPS for the Ti and Cr L_{3}, L_{2} and L_{1} subshell excitation and of AES for the Ti L_{3}M_{2,3}M_{2,3}, L_{3}M_{2,3}M_{4,5} and Cr L_{3}M_{2,3}M_{4,5} transitions were determined. A set of Cr samples with Ti overlayers had been prepared in situ. Measurements of the LEAPS and HEAPS signal amplitudes were used to derive the AEAPS and DAPS signal intensities....
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