Ultrasonic absorption of aniline/cyclohexane mixtures of critical and non‐critical composition

Abstract Results of measurements of the temperature and frequency dependence of ultrasonic absorption ( a / f 2 ) of aniline/cyclohexane mixtures of critical and non‐critical composition are reported. The data obtained with the mixture of critical composition are analysed in terms of the Ferrell‐Bhattacharjee theory (Phys. Rev. A 31 , 1788 (1985)). The value of the critical amplitude ω 0 of the relaxation rate used for calculation of the scaling variable Ω is obtained from static and dynamic light scattering data taken from the literature (ω 0 = (42±3)GHz). This value of ω 0 agrees with that obtained from a fit of the dynamic scaling function F ( Ω ) to the experimental ultrasonic absorption data (ω 0 = (42±5) GHz).

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