| Abstract: | The fine structure of the Rayleigh line wing was studied experimentally in a broad temperature range in the viscous guaiacol liquid. The propagation velocity and the absorption coefficient of the transverse hypersound were determined by the Rayleigh line wing spectra at temperatures from ?27 to ?85°C. The transverse hypersound absorption is shown to pass through its maximum at a temperature of ?34°C. The experimental data for two vitrifying viscous liquids, namely, guaiacol and salol were analyzed. The limiting elastic bulk moduli were found to intersect at the crystallization temperature and the limiting shear modulus to vanish at this temperature. These and other specific features of the guaiacol and salol behavior at the crystallization temperature, revealed in this and previous our studies, point to the possibility of the existence of two phases in a liquid. |
