The cross-over from hydrodynamic to fast sound in water at 5 C has recently been mapped experimentally by means of inelastic X-ray scattering. We show that a viscoelastic model gives a good account of both the longitudinal-current autocorrelation Function and the dynamic structure factor in the region of the cross-over. Evidence is also given for a weakly dispersing excitation observed in these experiments being a liquid state remnant of an oxygen-related optic mode in ice.
Viscoelastic model for the transition from normal to fast sound in water
Tozzini V;
1996
Abstract
The cross-over from hydrodynamic to fast sound in water at 5 C has recently been mapped experimentally by means of inelastic X-ray scattering. We show that a viscoelastic model gives a good account of both the longitudinal-current autocorrelation Function and the dynamic structure factor in the region of the cross-over. Evidence is also given for a weakly dispersing excitation observed in these experiments being a liquid state remnant of an oxygen-related optic mode in ice.File in questo prodotto:
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