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RESEARCH PRODUCT

Soret Effect In Forced Rayleigh-scattering

P. CavaliereJ. QuartieriSergio MartellucciGiovanni PierattiniFrancesco BloisiLuciano Rosario Maria VicariPasquale Mormile

subject

DiffractionMaterials sciencePhysics and Astronomy (miscellaneous)business.industryscatteringGeneral EngineeringPhase (waves)Physics::OpticsGeneral Physics and AstronomySoret effectGratingThermophoresisIntensity (physics)symbols.namesakeOpticsAmplitudesymbolsPhysics::Atomic PhysicsRayleigh scatteringAtomic physicsbusinessBeam (structure)

description

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.

yearjournalcountryeditionlanguage
1987-10-01
10.1007/bf00694201http://hdl.handle.net/11588/472487