Propagation velocity and attenuation coefficient of acoustics waves in paratellurite crystals were measured by Bragg diffraction of light in the frequency range 0.4 1.6 GHz. Based on these results the real and imaginary components of the complex tensor of elastic constants have been calculated. The analysis of the attenuation anisotropy was carried out for the acoustic waves with different polarization propagating in the crystallographic planes, which are orthogonal to symmetry axes of the second and fourth order. It is shown that strong anisotropy of acoustic attenuation observed for the transverse wave propagating in the plane (1-10), mainly due to the anisotropy of its phase velocity.
Institute of Nuclear Physics of Academy of Sciences of Republic of Uzbekistan. Tashkent 100214, Uzbekistan
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