Calculating the intensity of thermal diffuse scattering by polycrystalline BCC and FCC metals following the born method of model potentials

Based on the Max Born theory, a new method has been proposed for calculating the intensity of thermal diffuse scattering by bcc and fee polycrystalline metals. In distinction to the hitherto much used Borie theory based on the Debye model, it has been suggested that real relationships between vibration frequencies and the wave vector be used. Phonon spectra were calculated both in the Born— Begbie approximation (with inclusion of elastic constants $c_{11},c_{12},c_{44}$) and by the model potential method with consideration for interactions in an arbitrary coordination sphere.