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Acoustic and relaxation processes in supercooled o-ter-phenyl by optical-heterodyne transient grating experiment

R. Torre·A. Taschin·M. Sampoli
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Abstract

The dynamics of the fragile glass-forming o-ter-phenyl is investigated by time-resolved transient grating experiment with an heterodyne detection technique in a wide temperature range. We investigated the dynamics processes of this glass-former over more then 6 decades in time with an excellent signal/noise. Acoustic, structural and thermal relaxations have been clearly identify and measured in a time-frequency window not covered by previous spectroscopic investigations. A detailed comparison with the density response function, calculated on the basis of generalized hydrodynamics model, has been worked out.

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R. Torre, A. Taschin, M. Sampoli. 2001-06-29. Acoustic and relaxation processes in supercooled o-ter-phenyl by optical-heterodyne transient grating experiment. https://doi.org/10.1103/physreve.64.061504

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