Hydrodynamic study of 3-methylpentane by transient grating experiments

Year: 2004

Authors: Sampoli M., Taschin A., Eramo R.

Autors Affiliation: Dipartimento di Energetica, Istituto Nazionale per la Fisica della Materia and Laboratorio Europeo di Spettroscopica Non Lineare, Universita` di Firenze, Firenze, I-50139, Italy; Dipartimento di Fisica, Istituto Nazionale per la Fisica della Materia, Universita` di L’Aquila, L’Aquila, I-67100, Italy

Abstract: We report an optical heterodyne-detected transient grating experiment of glass-forming 3-methylpentane at different temperatures and wave vectors in the supercooled liquid range near the glass transition. We extract sound velocities, structural times and thermal diffusivities from fitting the spectra with a hydrodynamic model parametrizing the memory function of the viscosity with a stretched exponential.


Volume: 84 (13/16)      Pages from: 1481  to: 1490

KeyWords: Continuous wave lasers; Diffraction gratings; Dispersions; Glass transition; Hydrodynamics; Light interference; Neutron scattering; Permittivity; Supercooling; Thermal diffusion; Viscosity, Hydrodynamic models; Optical heterodyne; Polydispersity; Transient grating, Paraffins
DOI: 10.1080/14786430310001644242

Citations: 3
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