Determination of Inelastic Mean Free Path of Electrons in Noble Metals

Abstract

The experimental vałues of Inelastic Mean Free Path (λΙΜFΡ) of electrons in noble metals (Ag, Au, Cu) are determined in the electron energy range 150-2000 eV. The method used consists of the measurements and theoretical calcułations of the coefficient of elastic backscattering of electrons from a solid surface ne . The obtained values of λΙMFP are compared with the data available in the literature.

Quantification of surface-sensitive electron spectroscopies

“…In Fig. 4, we compare IMFPs for Au calculated from optical data [49,[55][56][57] with IMFPs obtained from the EPES method [58][59][60][61]. Although there is a reasonably good agreement between IMFP values calculated from optical data by different groups, the IMFPs obtained from EPES have considerable scatter.…”

Monte-Carlo Simulation in Electron Microscopy and Spectroscopy

“…We suppose the reason could lie in the measurements using the RFA analyser. The relative resolution of the analyser used in this experiment increases with energy up to 5 eV at 2.5 keV (Schmid et al, 1983); in subsequent experiments (Dolinski et al, 1988a(Dolinski et al, , 1988b(Dolinski et al, and 1992, the resolution is estimated to be 0.6 %, i.e., 12 eV at 2 keV. Thus, some inelastically scattered electrons with low energy loss are treated as elastically scattered electrons.…”

“…The MC -NEL defined values of IMFP agree in the energy range 0.2-1.5 keV also with the IMFP values in (Ashley, 1988). For the assessment, we used our simulated data of R e for the set of fitting parameters to calculate IMFP from experiment (Schmid et al, 1983) for several single values of energy by the usual EPES method, employed also in (Dolinski et al, 1988a(Dolinski et al, , 1988b(Dolinski et al, and 1992. We obtained the values of IMFP, very similar to those used in our MC code for generating the R e (E) with the best fit.…”

The Inelastic Mean Free Path οf Electrons. Research in Budapest, Warsaw, Wrocław and Clermont-Ferrand. Brief History and New Results

“…Later, Bideux elaborated the optimum biasing conditions [8]. Mróz et al [9] studied noble metals and Bondot evaluated the RFA experiments by applying his MC procedure [9]. The IMFP--EPES experimental results are summarized in [1,2].…”