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Physics

Condensed matter

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Displaying 1176 - 1200 of 1244

Quantitative Surface Analysis by X-Ray Photoelectron Spectroscopy

January 1, 1978
Author(s)
Cedric J. Powell
Measurements have been made of the relative intensities of the principal features in X-ray photoelectron spectra of indium, lead, and aluminum oxide and compared with those expected from a simple model for the photoemission process. Systematic effects in

Surface Characterization: Present Status and the Need for Standards

January 1, 1978
Author(s)
Cedric J. Powell
A summary is given of the present status and use of surface-characterization measurements in the United States. Attention is primarily devoted to those properties needed to characterize a solid surface, specifically the determination of surface composition

Angle-resolved photoemission from crystal-field-split adatom levels

April 15, 1977
Author(s)
J F. Herbst
We investigate the angular distribution of photoelectrons emitted from atoms physisorbed on the surface of a metal. The crystalline electric field of the surface is represented by a small number of point charges in the vicinity of the adatom, and the

Secondary-Electron Energy Distribution in High-Energy Photoemission

January 1, 1977
Author(s)
David R. Penn
We have calculated the energy distribution of secondary electrons observed in core-level XPS or core-level synchrotron photoemission experiments on Al. The secondary electrons are produced when the photoexcited primary electrons scatter inelastically from

Vibrational Excitation in Photoemission Spectroscopy of Condensed Molecules

December 15, 1976
Author(s)
John William Gadzuk
Photoelectron spectra of gas-phase molecules display sharp vibrational structure. The envelope of the spectrum is determined by the Franck-Condon factor. On the other hand, photoelectron spectra of the same molecules, adsorbed or condensed onto metal

Angle Resolved Auger Surface Spectroscopy

November 1, 1976
Author(s)
John William Gadzuk
The angular distribution of electrons ejected in core-valence-valence Auger transitions of atoms chemisorbed on metal surfaces is considered theoretically. Since the valence electrons participating in the Auger transition are also involved in chemical

Comment on Field emission as a probe of the surface density of states

July 15, 1976
Author(s)
David R. Penn
It is shown that the primary contribution to the field-emission current comes from electrons with total momentum equal to zero in a direction parallel to the metal surface and that the field-emission current measures the density of states at a point
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