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- W2022079346 abstract "By slow neutron inelastic scattering the phonon dispersion relation was measured in potassium fluoride at room temperature for waves propagating along symmetry directions [00ζ], [ζζ0], and [ζζζ]. The experiments were performed on the reactor Diorit at Würenlingen, using a triple axis spectrometer. The results were analyzed in terms of various interionic-force models. A satisfactory fit is provided by an eleven-parameter dipole approximation model, which allows for the polarizability of both ions. This model was then used to calculate a frequency distribution from which the specific heat and Debye temperature were evaluated for comparison with thermodynamic data. Die Phononendispersion in Kaliumfluorid wurde bei Zimmertemperatur durch unelastische Neutronenstreuung gemessen. Die Experimente wurden mit einem dreiachsigen Spektrometer am Reaktor „Diorit”︁ in Würenlingen durchgeführt. Die Resultate in den Symmetrierichtungen [00ζ], [ζζ0] und [ζζζ] werden mit verschiedenen Modellen analysiert; eine befriedigende Übereinstimmung läßt sich mit einem Elf-Parameter-Schalenmodell erreichen. Dieses Modell wird in der Folge für die Berechnung der Frequenzverteilung verwendet. Die damit im Rahmen der harmonischen Näherung bestimmte spezifische Wärme und die Debye-Temperatur sind in guter Übereinstimmung mit den thermodynamischen Daten." @default.
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- W2022079346 date "1970-01-01" @default.
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- W2022079346 title "Lattice Dynamics of Potassium Fluoride" @default.
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- W2022079346 doi "https://doi.org/10.1002/pssb.19700410235" @default.
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