Erschienen in:Jülich : Kernforschungsanlage Jülich Zentralbibliothek, Verlag, Berichte der Kernforschungsanlage Jülich 0005, 19 p. (1960).
Sprache:
Deutsch
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Beschreibung:
The effect of vibrational anharmonicity on the thermal scattering of X-rays from crystals is calculated for temperatures above the Debye temperature. A revised method of interpreting the experimental data is suggested. The (temperature dependent) dispersion curves (frequency vs. wave-vector) for small wave-vectors are determined by the isothermal rather than the adiabatic elastic constants. A procedure is outlined to extrapolate from the (temperature dependent) scattering data the (temperature independent) dispersion curves which correspond to the harmonic approximation.