Photoemission Studies of Solids Using Synchrotron Radiation.

The flexibility of using synchrotron radiation as a spectroscopic tool is demonstrated by high resolution (0.2 eV) X-ray photoemission studies at 8 keV of a few inner core levels of silver and gold. Future developments of focusing X-ray monochromators, based on phase space analysis, also discussed. The chemistry of oxygen chemisorption and subsequent oxidation of the surfaces of gallium arsenide, indium phosphide, and gallium antimonide was studied by observing the chemical shifts in the core levels of the surface atoms upon adsorption of oxygen. Photons between 10 and 30 eV were used to explore to study the valence band electronic structure upon chemisorption of oxygen. A series of valence band spectra of gallium arsenide as a function of photo energy from 11 to 28 eV were compiled.