Inelastic X-ray scattering and high-frequency dynamics of molecular liquids

Pontecorvo, E.; Di Leonardo, R.; Masciovecchio, C.; Ruocco, G.; Ruzicka, B.; Scopigno, T.; Sette, F.

doi:10.1351/pac200476010079

Pure Appl. Chem., 2004, Vol. 76, No. 1, pp. 79-89

http://dx.doi.org/10.1351/pac200476010079

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.