title: Particle excursions in colloidal crystals.
abstract: We have performed synchrotron small-angle x-ray diffraction experiments on charge-stabilized colloidal crystals. The mean squared displacements, obtained from Debye-Waller factors, decrease with increasing density beyond freezing. Irrespective of the range of the repulsion, our data and previous results lie on a common curve, linearly scaled between the melting and close-packed densities. Surprisingly, the excursions are smaller than predicted by theory.
authors.affiliation: Van der Waals-Zeeman Instituut, Universiteit van Amsterdam, NL-1018 XE, Amsterdam, The Netherlands.
authors.forename: M
authors.initials: M
authors.lastname: Megens
authors.forename: W L
authors.initials: WL
authors.lastname: Vos