Structural relaxation in the dynamics of glycerol: A joint visible, UV and x-ray inelastic scattering study

Andrea Giugni*, A. Cunsolo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

We describe an experimental study of the dynamic structure factor of liquid glycerol performed by complementary inelastic techniques such as Brillouin visible, ultraviolet and x-ray scattering. The spectra have been collected as a function of both temperature and momentum transfer. The relevant hypersonic parameters are evaluated from the spectral lineshape analysis modelling the data with a simple hydrodynamic profile. The study of their frequency dependence allows us to observe the occurrence of an active structural relaxation and to measure the related timescale. We also find signatures of further relaxation processes occurring below the accessible frequency window. As a result, the dynamic window traditionally probed in spectroscopic experiments is greatly extended and partially bridges the gap between MHz and THz techniques.

Original languageEnglish (US)
Pages (from-to)889-902
Number of pages14
JournalJournal of Physics Condensed Matter
Volume18
Issue number3
DOIs
StatePublished - Jan 25 2006

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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