Zeitschrift für Physik B Condensed Matter

, Volume 90, Issue 2, pp 201–206 | Cite as

VUV-photoelectron spectroscopy on lead clusters deposited from the pulsed arc cluster ion source (PACIS)

  • H. R. Siekmann
  • E. Holub-Krappe
  • Bu. Wrenger
  • Ch. Pettenkofer
  • K. H. Meiwes-Broer
Original Contributions


Lead clusters grown in a pulsed arc cluster ion source (PACIS) are soft-landed under UHV conditions on cooled polycrystalline silver targets. VUV-photoelectron spectroscopy with light from the synchrotron BESSY applied to mass-selected clusters on cold (160 K) substrates shows that the Pb 5d core level binding energies depend on cluster size and-only beyond a critical amount of deposited clusters-on the coverage Θ. A decreasing particle size induces a core level shift towards lower binding energy with respect to the bulk value, the maximum shift being −0.33 eV. The same value is achieved by atom deposition and can be explained by a Born-Haber cycle. The limits for small two-dimensional and large three-dimensional clusters will qualitatively be discussed by the same model. Deposition on a warm substrate, however, leads-at least for small systems-to a gradual line shift with Θ.


Core Level Decrease Particle Size Lower Binding Energy Level Binding Lead Cluster 
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Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • H. R. Siekmann
    • 1
  • E. Holub-Krappe
    • 2
  • Bu. Wrenger
    • 1
  • Ch. Pettenkofer
    • 2
  • K. H. Meiwes-Broer
    • 1
    • 3
  1. 1.Fakultät für PhysikUniversität BielefeldBielefeld 1Federal Republic of Germany
  2. 2.Boreich SHahn-Meitner-InstitutBerlin 39Federal Republic of Germany
  3. 3.Fachbereich PhysikUniversität RostockRostockFederal Repulic of Germany

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