Height and density correlations at liquid surfaces; application to X-ray scattering |
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Authors: | S Mora J Daillant |
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Institution: | (1) LURE, CNRS-CEA-MINREC, Centre Universitaire Paris-Sud, batiment 209D, BP 34, 91898 Orsay Cedex, France and Service de Physique de l'état Condensé, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France, FR |
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Abstract: | We calculate height-height correlation functions, near-surface density-density correlation functions and the corresponding
frequency integrated spectra for a heat conducting viscous fluid. We calculate scattering cross-sections for the static and
dynamic X-ray scattering experiments recently developed to investigate the nanometer-scale structure and fluctuations of liquid
interfaces. We show that the density-density correlations make an important contribution to the scattering, even using evanescent
waves, and that they are strongly affected by the surface. We also discuss the implications for X-ray photon correlation spectroscopy
and X-ray inelastic scattering.
Received 12 October 2001 Published online 6 June 2002 |
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Keywords: | PACS 61 10 -i X-ray diffraction and scattering – 68 03 -g Gas-liquid and vacuum-liquid interfaces – 68 03 Kn Dynamics (capillary waves) |
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