Accession Number:

ADA207846

Title:

Hydrogen Adsorption at Nb(100): Photoemission Evidence of Two-Stage Exchange Involving Subsurface States

Descriptive Note:

Technical rept. 1 Apr 1988-30 Mar 1989

Corporate Author:

TEXAS UNIV AT AUSTIN DEPT OF PHYSICS

Report Date:

1988-04-14

Pagination or Media Count:

9.0

Abstract:

Temperature dependent properties of electronic states resulting from hydrogen adsorption of Nb100 surfaces have been studied by photoemission spectroscopy using synchrotron radiation. The most prominent hydrogen induced feature in photoemission spectra exhibits a temperature dependence that requires contributions from two distinct states. Analysis of the photon energy dependent cross section of the hydrogen induced features suggests that hydrogen chemisorption sites are located below the surface. These results have important consequences for kinetic models that attempt to account for hydrogen uptake by Nb. Keywords Surface chemistry, Structure, Electronics properties, Surfaces, Niobium, Reprints.

Subject Categories:

  • Inorganic Chemistry
  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE