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  • 36.40. +d  (2)
  • 35.20i  (1)
  • 1
    Electronic Resource
    Electronic Resource
    High resolution spectroscopy of small metal clusters (1991)
    Springer
    The European physical journal 19 (1991), S. 7-12 
    Details
    ISSN: 1434-6079
    Keywords: 36.40 +d ; 31.50 +w ; 35.20i
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The optical absorption spectrum of small lithium clusters has been measured up to Li8. In Li3 high resolution Two Photon Ionization (TPI) spectra have been recorded allowing us to determine the geometry and potential surfaces of the ground and excited states. In larger clusters, the excited states are dissociative and the absorption spectra have been obtained by Depletion Spectroscopy. Vibronic resolution is still achieved in Li4, but not in larger clusters. The measured spectra exhibit a rather small number of transitions to electronically excited states. In Li7, only one intense band is observed in the blue region, while in Li8, an intense band is also observed in the blue region and a much weaker band in the red region. All the obtained results are in very good agreement with the ab initio calculation of Bonacic-Koutecky et al. This demonstrates that molecular effects are always present in these small clusters. The semi-classical models of surface plasma resonances are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01448245
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  • 2
    Electronic Resource
    Electronic Resource
    Structure of small rare earth clusters (1991)
    Springer
    The European physical journal 19 (1991), S. 191-193 
    Details
    ISSN: 1434-6079
    Keywords: 35.20.Vf ; 36.40. +d
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Rare earth clusters are produced by the inert gas condensation technique. The observed size distribution shows large peaks atn=13, 19, 23, 26, 29, 32, 34, 37, 39, 45, ... The beginning of this sequence (up to 34) has been already observed in argon clusters and recently by our group in barium clusters; this sequence may be interpreted in terms of icosahedral structures corresponding to the addition of caps on a core icosahedron of 13 atoms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01448289
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Comparison between selenium and tellurium clusters (1991)
    Springer
    The European physical journal 19 (1991), S. 237-239 
    Details
    ISSN: 1434-6079
    Keywords: 35.20.Vf ; 36.40. +d
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Selenium and tellurium clusters are produced by the inert gas condensation technique. The mass spectra of both species are completely different and reveal different properties. In selenium, a periodicity of 6–7 is observed and may be interpreted by the binding energy between small cyclic molecules. Moreover, it was very difficult to obtained large clusters probably because the binding energy between these molecules is very small. In tellurium, these periodic structures do not exist and large clusters are easily obtained in nucleation conditions where only small selenium clusters are present. These results are discussed and a simple nucleation model is used to illustrate this different behavior. Finally these clusters properties are correlated to the bulk structure of both materials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01448301
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    Paper (German National Licenses)
    Fulltext
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