Accession Number : AD0761876

Title :   Electron Scattering from a Tungsten (100) Crystal,

Corporate Author : ILLINOIS UNIV URBANA COORDINATED SCIENCE LAB

Personal Author(s) : Edwards,David Edgar , Jr

Report Date : MAY 1972

Pagination or Media Count : 185

Abstract : The elastic reflection coefficient for the spectularly scattered electrons (the (0,0) diffraction beam) has been measured for electrons scattered from the (100) surface of a tungsten crystal. The measurements were made at a polar angle of 53 degrees and azimuthal angles of 0 degrees, 22.5 degrees, and 45 degrees. The measurements were made on both clean and gas covered surfaces. The secondary electron energy distribution has also been measured at the above angles for clean and gas-covered surfaces. Both loss peaks and secondary peaks have been observed. A model is discussed which provides one explanation for the experimentally observed correlation of peaks in the elastic reflection coefficient with peaks in the secondary electron energy distribution. A comparison of model predictions and experimental results is made. (Author)

Descriptors :   (*TUNGSTEN, SURFACE PROPERTIES), (*ELECTRON IRRADIATION, TUNGSTEN), ELECTRON DIFFRACTION, SECONDARY EMISSION, ELASTIC SCATTERING, ADSORPTION, GASES, THESES

Subject Categories : Physical Chemistry
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE