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Abstract : The sound velocity in water has been measured at ultrasonic and hypersonic frequencies and the results show a negative dispersion in the supercooled region. We present measurements of sound velocity and absorption obtained by Brillouin light scattering which show that the effect of structural relaxation is not observed at 0 °C and frequencies smaller than 7.2 GHz. A correction of the hypersonic data shows that there is no apparent disagreement between the ultrasonic and the hypersonic data.

Keywords : Brillouin spectra liquid structure molecular reorientation supercooling ultrasonic dispersion ultrasonic velocity water





Autor: O. Conde J. Leblond J. Teixeira

Fuente: https://hal.archives-ouvertes.fr/



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