Accession Number : AD0737043

Title :   Investigation of the Scattering of Low Energy Electrons from the Surface of Single Crystal Aluminum,

Corporate Author : ILLINOIS UNIV URBANA COORDINATED SCIENCE LAB

Personal Author(s) : Burkstrand,James M.

Report Date : JAN 1972

Pagination or Media Count : 129

Abstract : Elastic and inelastic low energy diffraction (ELEED, ILEED) observations have been made on a clean surface of Al(100). Measurements on the (10) and (11) elastic diffraction beams were made using normally incident electrons in the energy range 30 < E < 170 eV. Peaks in the energy loss distribution are seen near 5, 10, 15, 26, and 31 eV, the dominant peaks near 10 and 15 eV corresponding to surface and bulk plasmon excitations respectively. Two types of structure are observed in the inelastic angular profiles: one closely correlated with the structure in the elastic angular profiles, and the second being substructure corresponding to different ILEED conditions. Energy intensity profiles (as a function of incident energy) for the (10) and (11) elastic and inelastic diffraction beams have been measured. These profiles also show primary and secondary structure. Within the substructure of the angular and energy intensity profiles are the first experimental observations of sideband diffraction. A comparison of the experimental results and the theoretical predictions of Duke and Laramore and of Duke and Bagchi is made. (Author)

Descriptors :   (*METAL CRYSTALS, *ELECTRON DIFFRACTION), (*ALUMINUM, SURFACE PROPERTIES), SINGLE CRYSTALS, ELECTRON IRRADIATION, SCATTERING, ELECTRON GUNS, EXPERIMENTAL DESIGN

Subject Categories : Physical Chemistry
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE