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Philosophical Magazine Volume 84, 2004 - Issue 13-16: Special Issue: Papers presented at the 9th International Workshop on Disordered Systems, Trento, Italy, 10–13 March 2003
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Original Articles

Study of the Rytov dip for liquid o-terphenyl

R. Angelini European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex, France
,
D. Fioretto Dipartimento di Fisica and Istituto Nazionale per la Fisica della Materia, Università di Perugia, Via Pascoli, I-06123 Perugia, Italy
,
J. Gapinski Institute of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznan, Poland
,
G. Monaco European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex, France
&
A. Patkowski Institute of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznan, Poland
Pages 1463-1469 | Published online: 02 Sep 2006
 
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Abstract

Light scattering spectra in the depolarized configuration are presented for the fragile glass former o-terphenyl in the temperature range between 350 and 421 K. These spectra are characterized by the presence of the Rytov dip and have been analysed in terms of the two-variable model of Andersen and Pecora. This model works well in the whole temperature range explored, that is over a range where the shear viscosity varies by almost one decade. The coupling parameter R is extracted and turns out to be almost temperature independent and very similar to that derived for other studied systems.

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