Electron energy losses in thin graphite layers on the (111) face of nickel

Abstract
Equally spaced multiple losses of 29±1 eV were observed accompanying 700–1500‐eV electrons elastically reflected from epitaxial graphite layers formed by segregation to a Ni(111) surface. Both the loss spectra and the structure in the ``true secondary'' region from the thin segregated layers were indistinguishable from those obtained with bulk pyrolytic graphite. The relative loss peak intensities agree well with the theoretical predictions of Lucas and Sunjic.