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  • 1
    Electronic Resource
    Electronic Resource
    Thermal electronic properties of alkali clusters (1991)
    Springer
    The European physical journal 19 (1991), S. 51-53 
    Details
    ISSN: 1434-6079
    Keywords: 36.40. +d ; 31.20.Sy ; 05.30.−d ; 65.60. +m
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We apply the finite-temperature Kohn-Sham method to alkali metal clusters, using the spherical jellium model and treating the valence electrons as a canonical system in the heat bath of the ions. We study the shell effects in the total free energyF(N) and the entropyS(N) for neutral clusters containingN atoms. Their strongest temperature dependence is due to the finite ground-state valueS 0〉0 of the electronic entropy for non-magic clusters. It leads to a decreasing amplitude and an increasing smear-out of the saw-tooth structure in the first difference Δ1 F(N)=F(N−1)−F(N) with increasing temperatureT and cluster sizeN.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01448253
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Triaxial shapes of sodium clusters (1995)
    Springer
    The European physical journal 34 (1995), S. 125-134 
    Details
    ISSN: 1434-6079
    Keywords: 36.40 ; 35.20.Wg ; 71.45.Nt
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A modified Nilsson-Clemenger model is combined with Strutinsky's shell correction method. For spherical clusters, the model potential is fitted to the single-particle spectra obtained from selfconsistent Kohn-Sham calculations. The deformation energy surfaces of sodium clusters with sizes of up toN=270 atoms are calculated for a combination of triaxial, quadrupole and hexadecapole deformations. The ground state shapes and energies are determined by simultaneous minimization with respect to the three shape parameters. A significant fraction of the clusters is predicted to be triaxial. The deviations from the axial shape do not generate any systematic odd-even staggering of the binding energies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01439387
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Modified Nilsson model for large sodium clusters (1993)
    Springer
    The European physical journal 28 (1993), S. 235-245 
    Details
    ISSN: 1434-6079
    Keywords: 36.40 ; 35.20.Wg ; 71.45.Nt
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We propose a modified Nilsson model for spheroidal sodium clusters and investigate the modification of shell structure by deformation for sizes up toN=850. For spherical clusters, our potential is fitted to the single-particle spectra obtained from microscopically selfconsistent Kohn-Sham calculations using the jellium model and the local density approximation. Employing Strutinsky's shell-correction method, the surface energy of the jellium model is renormalized to its experimental value. We find good agreement between our theoretically predicted deformed magic numbers and the experimentally observed ones extracted from recent sodium mass abundance spectra.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437890
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    Paper (German National Licenses)
    Fulltext
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