Przeglądaj {{ collection }} wg Autor "Malinowska-Adamska, Cecylia"

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  • Pozycja
    Self-consistent calculations of the dynamic, thermodynamic and elastic properties of a lattice of atomic crystals
    (Wydawnictwo Politechniki Łódzkiej, 2007) Malinowska-Adamska, Cecylia; Słoma, Piotr
    The application of the self-consistent phonon theory (SCPT) formulated by Plakida and Siklós on the basis of the double-time Green's function method to the atomic crystals: rare gas solids (RGS), quantum crystals (QC) and metallic crystals (MC) is discussed. The special attention is given in theoretical investigation of the dynamic, thermodynamic and elastic properties of fcc and bcc structures using the reduced all-neighbours approximation of SCPT. The interatomic interactions in the mentioned crystals are described by the various models, among them by the generalized (exp,m) Buckingham, (n,m) Lennard-Jones and (exp,exp) Morse self-consistent potentials. The potential parameters are determined self-consistently with the help of the zero-point experimental data: the lattice constant, sublimation energy, compressibility and Debye characteristic temperature. Within numerical calculations we study the influence of the number of "important" shells of neighbours on temperature and pressure variations of the selected physical properties of atomic crystals. The computed results are compared with available experimental data.
  • Pozycja
    Thermodynamic properties of solid neon in the reduced all-neighbours approximation of the self-consistent phonon theory
    (Wydawnictwo Politechniki Łódzkiej, 2007) Tomaszewski, Janusz; Malinowska-Adamska, Cecylia; Słoma, Piotr
    The results of studies of physical properties of solid neon with the help of the reduced, all-neighbours approximation of the self-consistent phonon theory are presented. The interatomic interactions are described by the generalized Buckingham, Lennard-Jones and Morse self-consistent potentials. The parameters of these potentials in highest approximation with the number of nearest-neighbours are determined using experimental values for the lattice constant, cohesive energy, bulk modulus and the Debye characteristic temperature. Numerical results of our calculations for temperature and pressure dependence of selected physical properties are given and compared with available experimental data for Ne-20 fcc lattice.