Absorption and Dispersion of Ultrasonic Waves in n-Amylic Alcohol-Nitromethane Critical Mixture |
| T. Hornowski and M. Łabowski Institute of Acoustics, A. Mickiewicz University, Matejki 48/49, 60-769 Poznań, Poland |
| Received: December 11, 1990 |
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| Measurement of absorption and propagation velocity of ultrasonic waves as well as shear viscosity in n-amylic alcohol-nitromethane critical mixture are reported. Acoustic measurements were performed in the frequency range from 5 to 25 MHz and temperatures ΔT = T - Tc from 0.1 to 12.3 K. An analysis of the results was carried out on the basis of a modified version of mode-coupling theory [10], which led to good agreement with experiment. The correlation length ξ0 = 0.94 Ǻ is in agreement with the value obtained from optical measurements. |
| DOI: 10.12693/APhysPolA.79.671 PACS numbers: 43.35+d |