Ultraviolet Brillouin spectroscopy of glass-forming glycerol

Year: 2004

Authors: Benassi P., Cunsolo A., Eramo R., Giugni A., Nardone M., Sampoli M.

Autors Affiliation: Dipartimento di Fisica and Istituto Nazionale per la Fisica della Materia, Università di L’Aquila, Via Vetoio, Coppito, L’Aquila, 67100, Italy; Istituto Nazionale per la Fisica della Materia, Institute Laue–Langevin, BP 220, Grenoble, F-38043, France; Dipartimento di Energetica, Istituto Nazionale per la Fisica della Materia and Laboratorio Europeo di Spettroscopia Non Lineare, Università di Firenze, Via Santa Marta 3, Firenze, 50123, Italy

Abstract: The newly built ultraviolet Raman-Brillouin spectrometer at the Universita’ di L’Aquila is described. We have used it to perform accurate ultraviolet and visible Brillouin spectra of glass-forming glycerol. Data with high contrast and high dynamic range in the unexplored region of wave vectors from 40 up to about 70 mum(-1) have been obtained for the first time. The spectra are analysed in terms of generalized hydrodynamics with a frequency-dependent viscosity.

Journal/Review: PHILOSOPHICAL MAGAZINE

Volume: 84 (13-16)      Pages from: 1413  to: 1422

KeyWords: Acoustic waves; Brillouin scattering; Data reduction; Degrees of freedom (mechanics); Energy transfer; Glass; Hydrodynamics; Light scattering; Perturbation techniques; Refractive index; Spectrometers; Ultraviolet pectroscopy; Viscosity, Dynamic structure factors; Glass-forming liquids; Inelastic X-ray scattering (IXS); Thermodynamic coefficients, Glycerol
DOI: 10.1080/14786430310001644161

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