Volume 56, Number 6, December 2001
|808 - 814
|Condensed matter: structure, mechanical and thermal properties
|01 December 2003
New light scattering technique based on phase time derivative correlation function
Department of Physics of Complex Systems, The Weizmann
Institute of Science 76100 Rehovot, Israel
Accepted: 26 September 2001
By using a heterodyne two-cross-beam configuration, we develop a new light scattering technique to study critical fluctuations. This optical arrangement gives the possibility to measure the critical dependence of both the intensity linewidth and the correlation function of the phase time derivative, in near its gas-liquid critical point. We showed both experimentally and theoretically that the critical behaviour of the phase time derivative correlation function is determined by the thermodiffusive mode critical dependence, similar to the intensity linewidth. A good agreement between the experimental results and the theory is found.
PACS: 64.60.Fr – Equilibrium properties near critical points, critical exponents / 64.60.Ht – Dynamic critical phenomena / 05.70.Jk – Critical point phenomena
© EDP Sciences, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.