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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 22 (1992), S. 641-644 
    ISSN: 1434-6079
    Keywords: 31.20.Ej ; 36.40.+d
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The electronic states of small Al n (n=2–8) clusters have been calculated with a relativistic ab-initio MO-LCAO Dirac-Fock-Slater method using numerical atomic DFS wave-functions. The excitation energies were obtained from a ground state calculation of neutral clusters, and in addition from negative clusters charged by half an electron in order to account for part of the relaxation. These energies are compared with experimental photo-electron spectra.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 24 (1992), S. 171-176 
    ISSN: 1434-6079
    Keywords: 79.20 ; 34.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The TRIM.SP program which is based on the binary collision approximation was changed to handle not only repulsive interaction potentials, but also potentials with an attractive part. Sputtering yields, average depth and reflection coefficients calculated with four different potentials are compared. Three purely repulsive potentials (Molière, Kr-C and ZBL) are used and an ab initio pair potential, which is especially calculated for silicon bombardment by silicon. The general trends in the calculated results are similar for all potentials applied, but differences between the repulsive potentials and the ab initio potential occur for the reflection coefficients and the sputtering yield at large angles of incidence.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 7 (1987), S. 139-146 
    ISSN: 1434-6079
    Keywords: 31.20.Ej ; 31.20.Tz
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Correlation energies for all isoelectronic sequences of 2 to 20 electrons andZ=2 to 25 are obtained by taking differences between theoretical total energies of Dirac-Fock calculations and experimental total energies. These are pure relativistic correlation energies because relativistic and QED effects are already taken care of. The theoretical as well as the experimental values are analysed critically in order to get values as accurate as possible. The correlation energies obtained show an essentially consistent behaviour fromZ=2 to 17. ForZ〉17 inconsistencies occur indicating errors in the experimental values which become very large forZ〉25.
    Type of Medium: Electronic Resource
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