Negative Dispersion of High-Frequency Sound Velocity in Aqueous Solutions of Non-Electrolyte in a Vicinity of the Singular Point Concentration
L. M. SabirovPhysics Department, Samarkand State UniversityD. I. SemenovPhysics Department, Samarkand State UniversityKh.S. KhaydarovPhysics Department, Samarkand State University
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A new method of determination of the hypersound velocity dispersion is proposed. It is based on the direct measurement of the frequency shift of Brillouin components in the light scattering spectra registered at different angles. The concentration dependence of the hypersound velocity dispersion is studied in 4-methylpyridine-water solutions. Negative dispersion is experimentally observed in the region of the singular point concentration.
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