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DY: Fachverband Dynamik und Statistische Physik

DY 29: Poster II

DY 29.67: Poster

Thursday, February 28, 2008, 16:00–18:00, Poster C

Brillouin spectroscopy of disordered systems — •Andreas Meier-Koll, Johannes Wiedersich, Peter Müller-Buschbaum, and Walter Schirmacher — Physik-Department E13, TU München

We have measured the longitudinal and transverse sound velocities in sodium silicate melts and polymeric materials by means of Brillouin spectroscopy using a tandem Fabry-Perot interferometer. In both material classes the relaxation processes can be observed from the smooth steps in the sound velocities and the maxima in the line widths. We interpret our data in terms of pertinent relaxation models.