THE SURFACE PHYSICS OF SIMPLE AND COMPLEX ELECTRON EMITTERS.
Abstract
The kinetics of adsorbed layers of KCl on W, Cl on W, Sr on W, O on W, and O on Mo have been investigated in the temperature range 300 degrees K to 1900 degrees K by means of field electron microscopy. The adsorption, desorption, and migration of Sr on W, Ba on W, and Sr on Mo were also examined. The variation of average work function of the surface with 'coverage', the Gibbs free energy for desorption, and the activation energy for migration around the (110) were measured. The polorizability of Sr was evaluated from four theories of adsorption. Only MacDonald and Barlow's theory gave results in agreement with other measurements and computations. For metal surfaces, theory and experiment in second order Schottky effect confirmed the mirror image nature of surface barrier up to distances of few lattice parameters, and has related the energy structure for the electrons in the surface layer to the interior structure of the emitter. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 06, 1967
- Accession Number
- AD0660211
Entities
People
- Alex A. Petrauskas
- Edward A. Coomes
Organizations
- University of Notre Dame