DETECTION OF PHASE TRANSITION IN QUINOLINE LIQUID BY POLARIZED RAYLEIGH SCATTERING TECHNIQUE
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Date
1999
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Publisher
Ohio State University
Abstract
In this paper, we measured the polarized light scattering of quinoleine by Rayleigh-Brillouin technique. We are interestedin Brillouin doublet positionin polarized scattering spectra of the liquid. We are also interested in the ratio of the centered components of Rayleigh peak to the Brillouin doublet. The Brillouin position measured by this technique is very precise and lead to study the eventual liquid phase transition in quinoline. We have calculated the sound velocity, assumed to be linear as temperature function. However, an abnormal behavior in temperature range $288K \le T \le 330 K$, is observed in our experimental results. We have also calculated the Landau-Placzek ratio. This ratio exhibit two picks in the range temperature mentioned above. These anomalies show that quinoline presents a phase transition strong enough to perturb its thermodynamic equilibrium.
Description
Author Institution: L.P.S., Department of Physics, D.M. Sciences Faculty; Sciences Faculty of Fes, D.M. Sciences Faculty; C.P.M.O.H. Physics Dept., Bordeaux I Sciences University