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Träfflista för sökning "WFRF:(Wolter A.) srt2:(1997-1999)"

Sökning: WFRF:(Wolter A.) > (1997-1999)

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1.
  • Sandell, A., et al. (författare)
  • Observation of a low-energy adsorbate core-level satellite for CO bonded to palladium : Coordination-dependent effects
  • 1998
  • Ingår i: Physical Review B (Condensed Matter). - 0163-1829. ; 57:20, s. 13199-13208
  • Tidskriftsartikel (refereegranskat)abstract
    • A strong low-energy shake-up satellite for CO adsorbed on Pd is observed. The occurrence of the satellite is established for the CO/1 ML Pd/Mo(110) system at a coverage where CO adsorbs exclusively on-top. Comparisons with CO adsorbed on Pd single-crystal surfaces and small supported Pd particles indicate that the strongly increased satellite intensity is due to the decreased CO-Pd interaction strength for on-top adsorbed CO. This can be used to get further insight into the structure and bonding properties of the adsorbate system. Since a low-energy shake-up feature may be misinterpreted as a chemically shifted component, the conclusion is that great care has to be taken in the evaluation of adsorbate core-level spectra for systems with large variations in adsorption strength depending on the adsorbate sites. Large variations in the CO site distribution may furthermore occur depending on the nature of the Pd substrate: Adsorption of CO on 1 ML Pd/Mo(110) leads to an overlayer dominated by an on-top species and, likewise, the CO overlayer formed on small Pd particles after large doses has a large fraction of on-top bonded species. This is in strong contrast to Pd single-crystal surfaces, where CO adsorbed in more highly coordinated sites is abundant.
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3.
  • Chadwick, MB, et al. (författare)
  • Open problems in quantum-mechanical approaches to multistep direct nuclear reactions
  • 1999
  • Ingår i: ACTA PHYSICA SLOVACA. - : SLOVAK ACAD SCIENCES INST PHYSICS. - 0323-0465. ; 49:3, s. 365-379
  • Tidskriftsartikel (refereegranskat)abstract
    • Open problems in the theoretical formulation and computational implementation of multistep direct preequilibrium reactions are discussed. Recommendations for future research on both theoretical and experimental aspects of the problem are given.
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4.
  • Kemerink, Martijn, et al. (författare)
  • Spin-dependent holed delocalization enhancement by bandfilling effects in degenerate asymmetric double quantum wells
  • 1997
  • Ingår i: Superlattices and Microstructures. - : Elsevier. - 0749-6036 .- 1096-3677. ; 21:2, s. 217-222
  • Tidskriftsartikel (refereegranskat)abstract
    • We studied the wavefunctions and energy positions of the confined states in the valance band in an asymmetric double quantum well. We found these to be extremely sensitive to both the carrier density and the height of the confining barriers, which allows us to control the so-called Spin Dependent Hole Delocalization. The theoretical results are shown to be in excellent agreement with experiments. (C) 1997 Academic Press Limited
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  • Resultat 1-4 av 4

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