Surface Studies by Low-Energy Electron Diffraction and Related Techniques.
Abstract
The single scattering contribution of the low-energy electron diffraction (LEED) intensity has been extracted by an averaging technique. This allows analysis using only simple modifications of conventional diffraction analysis. Very detailed checks of the procedure have been made for clean surfaces of Ni(111), Ag(111) and W(110). The experimentally averaged intensities agrees with the calculated single scattering intensity to within a few percent. In order to study the effects of lattice dynamics a very accurate diffractometer was built to operate from 8 to 1000K. Thermal diffuse scattering of elecrons from Ag were studied and separated into zero, one, and multiphonon scattering events throughout the entire Brillouin zone. This work also makes it possible to account for the thermal scattering sufficiently accurately to study disordered overlayers and surface imperfections on solids. Physisorption of Xe on Ag(111) and chemisorption of O on W were studied.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 27, 1974
- Accession Number
- ADA003749
Entities
People
- M. B. Webb
Organizations
- University of Wisconsin–Madison