Inelastic X-ray scattering and high-frequency dynamics of molecular
liquids
E. Pontecorvo, R. Di Leonardo, C. Masciovecchio, G. Ruocco, B. Ruzicka,
T. Scopigno, and F. Sette
Dipartimento di Fisica and INFM, Universita di Roma
“La Sapienza ”, I-00185, Roma, Italy
Sincrotrone Trieste, Area Science Park, I-34012, Trieste, Italy
European Synchrotron Radiation Facility, B.P.220, F-38043 Grenoble,
Cedex, France
Abstract:
The recently developed inelastic X-ray scattering technique opens
a new kinematic region at the observation of molecular liquids vibrational
dynamics over the lengthscales of the interparticle separation. We illustrate
the capabilities of this powerful technique through the results obtained
from liquid glycerol. A detailed analysis of the high-frequency vibrational
dynamics of this system at ambient temperature is reported. New results
in the study of structural relaxational dynamics in the high-temperature
range (up to T = 560 K) are also discussed.
*Lecture presented at the European Molecular Liquids
Group (EMLG) Annual Meeting on the Physical Chemistry of Liquids: Novel
Approaches to the Structure, Dynamics of Liquids: Experiments, Theories,
and Simulation,Rhodes, Greece, 7-15 September 2002. Other presentations
are published in this issue, pp. 1-261.
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