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  • 1
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 16 (1979), S. 1239-1247 
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On a calculé des polarisabilités multipolaires dépendantes de la fréquence pour la série de He à partir d'un modèle hydrodynamique de la mécanique quantique dans le cadre d'un Hamiltonien de particules indépendantes. Notre méthode est équivalente à l'approximation de Hartree-Fock noncouplée, ce qui veut dire, que nos valeurs des polarisabilités, des énergies de transition et des coefficients pour les forces de dispersion sont comparables aux résultats précédents obtenus par cette approximation.
    Abstract: Frequenzabhängige Multipolpolarisierbarkeiten für die He-Folge sind mittels eines hydrodynamischen Modells der Quantenmechanik im Rahmen eines Hamiltonoperators für unabhängige Teilchen berechnet worden. Unser Verfahren ist der ungekoppelten Hartree-Fock-Näherung äquivalent und deswegen sind unsere Werte für die Polarisierbarkeiten, die Übergangsenergien und die Dispersionskraftkoeffizienten mit früheren Ergebnissen dieser Näherung vergleichbar.
    Notes: Frequency-dependent multipole polarizabilities of the He sequence have been calculated from a hydrodynamic model of quantum mechanics and using an independent-particle model Hamiltonian. Our present scheme is parallel to the uncoupled Hartree-Fock approximation so our values of polarizabilities, multipole transition energies and dispersion force coefficients between the He—He pair are comparable with earlier works using the uncoupled Hartree-Fock approximation.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 17 (1980), S. 673-678 
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Two previous schemes for the calculation of dynamic multipole polarizabilities of atomic systems, namely, a hydrodynamic analogy to quantum mechanics and a perturbation expansion of the energy in multipoles, follow also from the conventional time-dependent perturbation scheme.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 21 (1982), S. 1117-1121 
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Using the new expression for the dynamic multipole polarizabilities in terms of effective oscillator strengths and effective transition energies derived from the variational procedure based on the total energy expansion in terms of induced multipole moments, we have calculated the long-range dispersion force coefficients and the leading relativistic correction to the long-range potential between H, He+, He, and Li+. We have in addition calculated the oscillator strength sum rules for the above systems. Our results are comparable with those obtained using both a hydrodynamic model to quantum mechanics and double perturbation theory.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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