Dispersion of the sound speed in water-organic solutions

Concentration and temperature studies of spontaneous Mandelstam-Brillouin scattering of light in aqueous solutions of γ-picoline showed the manifestation of negative dispersion of hypersound velocity at concentrations С ≤ 0.2 mole fractions of γ-picoline. The temperature and concentration dependences of the negative dispersion are associated with the process of solution structurization, which reaches its optimum value at a concentration of C = 0.06 mole fractions of γ-picoline.