i simulate electron backscattering (18.6 keV, perpendicular to the surface) from a gold target and i have seen some strange peak structures right after the elastic backscattering peak (only with Penelope not with Livermore, Emstandard_Opt4, EmstandardSS). My first guess was that it corresponds to Energy Loss due to Auger Excitation but in a different work, with a different simulation tool these structures were assigned to plasmon excitations.
My Question is, are plasmon excitations part of the penelope model? I’ve found nothing about it in the official physics reference manual. However, in the Penelope 2018 Documentation plasmon excitations are at least mentioned.