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Current issue   Ukr. J. Phys. 2015, Vol. 60, N 9, p.872-875
https://doi.org/10.15407/ujpe60.09.0872    Paper

Sabirov L.M., Semenov D.I., Khaydarov Kh.S.

Physics Department, Samarkand State University
(15, University Blvd., Samarkand 140104, Uzbekistan; e-mail: denis.samarkand@gmail.com)

Negative Dispersion of High-Frequency Sound Velocity in Aqueous Solutions of Non-Electrolyte in a Vicinity of the Singular Point Concentration

Section: Soft matter
Original Author's Text: English

Abstract: 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.

Key words: sound velocity, dispersion, Rayleigh scattering, water solution, 4-methylpy-ridine.


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