Energieverlustmessungen an Silber mit hoher Energieauflösung

Abstract

In energy loss experiments on Ag-films with monochromatic fast electrons the separation of surface and volume loss is demonstrated. The surface loss is found at 3.63 0.02 eV with a half-width of ≈250 mV. The volume loss at 3.78±0.02 eV has a halfwidth of 75±15 mV. The energy loss spectrum is compared with that computed from optical data by means of the dielectric theory and shows good agreement. Also the dependance of the surface loss from the scattering angle and the angle of incidence is in agreement with calculated values. The shift of the volume loss with temperature of −2.5·10⁻⁴ eV/degree agrees with values obtained from experiments on plasma radiation.