Secondary electron emission and yield spectra of metals from Monte Carlo simulations and experiments

In this work, we present a computational method, based on the Monte Carlo statistical approach, for calculating electron energy emission and yield spectra of metals, such as copper, silver and gold. The calculation of these observables proceeds via the Mott theory with a Dirac-Hartree-Fock spherical...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2019-02, Vol.31 (5), p.55901-055901
Main Authors: Azzolini, Martina, Angelucci, Marco, Cimino, Roberto, Larciprete, Rosanna, Pugno, Nicola M, Taioli, Simone, Dapor, Maurizio
Format: Article
Language:English
Subjects:
Monte Carlo method
noble metals
secondary electron emission
yield
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Summary:In this work, we present a computational method, based on the Monte Carlo statistical approach, for calculating electron energy emission and yield spectra of metals, such as copper, silver and gold. The calculation of these observables proceeds via the Mott theory with a Dirac-Hartree-Fock spherical potential to deal with the elastic scattering processes, and by using the Ritchie dielectric approach to model the electron inelastic scattering events. In the latter case, the dielectric function, which represents the starting point for the evaluation of the energy loss, is obtained from experimental reflection electron energy loss spectra. The generation of secondary electrons upon ionization of the samples is also implemented in the calculation. A remarkable agreement is obtained between both theoretical and experimental electron emission spectra and yield curves.
ISSN:0953-8984
1361-648X
DOI:10.1088/1361-648X/aaf363