https://doi.org/10.1140/epjb/e2002-00173-2
Height and density correlations at liquid surfaces; application to X-ray scattering
LURE, CNRS-CEA-MINREC, Centre Universitaire Paris-Sud, bâtiment 209D, BP 34,
91898 Orsay Cedex, France
and
Service de Physique de l'État Condensé, CEA Saclay, 91191
Gif-sur-Yvette Cedex, France
Corresponding author: a daillant@lure.u-psud.fr
Received:
12
October
2001
Published online:
6
June
2002
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.
PACS: 61.10.-i – X-ray diffraction and scattering / 68.03.-g – Gas-liquid and vacuum-liquid interfaces / 68.03.Kn – Dynamics (capillary waves)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002