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Core Level Shake Up Structures of N2 Adsorbed on Nickel Surfaces: Cluster Models

  • K. Hermann
  • P. S. Bagus

Abstract

Self-consistent Hartree-Fock-LCAO calculations on a linear NiN2 cluster are used to explain the two-peak structure observed in core level photoemission from N2 adsorbed on the Ni(100) surface. The two peaks are due to different N2 core hole final states, a screened and an unscreened final state that can be clearly identified in the cluster model. The energy separation and intensity ratio (computed using the sudden approximation) of the two final states in NiN2 are comparable with the experimental peak separation and intensity ratio for reasonable cluster geometries. A comparison with previous model studies on NiCO is used to explain the different shape of the core level spectra of N2 and CO adsorbed on nickel surfaces.

Keywords

Ionization Potential Cluster Model Hole State Core Level Spectrum Core Ionization 
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Copyright information

© Plenum Press, New York 1981

Authors and Affiliations

  • K. Hermann
    • 1
    • 2
  • P. S. Bagus
    • 1
  1. 1.IBM Research LaboratoriesSan JoseUSA
  2. 2.Sonderforschungsbereich 126Göttingen/ClausthalWest Germany

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