Characterization of Surfaces by LowEnergy Helium Scattering.
Abstract
Low energy (11meV63meV) helium scattering was used in probing the surface properties of three metals, two epitaxial crystals, Ag(111) and Au(111) and a polycrystalline W(100). Quantum conservation equations for low energy atomic scattering were presented in three commonly used experimental coordinate systems. These equations accounted for gas particle energy exchange with surface phonons and gas particle diffraction from an arbitrary twodimensional surface lattice. The equations for selective adsorption were also presented. An experimental apparatus, a UHV to 10 to the minus 10 torr system, is described which permits excellent sensitivity and energy resolution in atomic and molecular surface scattering experiments.
 Publication:

Ph.D. Thesis
 Pub Date:
 1977
 Bibcode:
 1977PhDT........54H
 Keywords:

 Physics: Condensed Matter;
 Electron Scattering;
 Helium;
 Surface Properties;
 Crystals;
 GasMetal Interactions;
 Gold;
 Silver;
 Tungsten;
 SolidState Physics