Showing papers by "Giovanni Pierattini published in 1987"
TL;DR: In this article, the temporal behavior of the concentration grating versus the sample properties and its effect on the detected diffracted beam was studied. Explicit expressions for the output intensity taking into account both the generated amplitude and phase gratings were given for the generated intensity taking the generated phase and amplitude grating into account.
Abstract: In forced Rayleigh scattering of mixtures or suspensions the temperature gratings generate, by the Soret effect, concentration gratings that may be very important since they produce both a phase and an amplitude grating superimposed on the principal one. The experimental evidence of their influence was given by Thyagarajan and Lallemand using a mixture of carbondisulfide and ethanol. In this paper we study the temporal behaviour of the concentration grating versus the sample properties and its effect on the detected diffracted beam. Explicit expressions are given for the output intensity taking into account both the generated amplitude and phase gratings.
20 citations