Photon correlation spectroscopy: X rays versus visible light

Dirk O. Riese, Willem L. Vos, Gerard H. Wegdam, Frank J. Poelwijk, Douglas L. Abernathy*, Gerhard Grübel

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

43 Citations (Scopus)
23 Downloads (Pure)


We have performed combined dynamic light scattering (DLS) and dynamic x-ray scattering (DXS) experiments on dense colloidal suspensions. The intermediate scattering functions obtained with these two techniques are compared directly. In the case of optically index matched samples, the comparison demonstrates that DXS yields accurate and reliable results. It is shown that the hydrodynamic interaction [Formula Presented] can be determined experimentally, without taking recourse to any theoretical model, by combining DXS and DLS. The combination of the two methods probes the dynamics over more than one decade in scattering vector. Experiments on optically opaque samples, where DLS fails, demonstrate the necessity to use x rays in these systems.

Original languageEnglish
Pages (from-to)1676-1680
Number of pages5
JournalPhysical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Issue number2
Publication statusPublished - 1 Feb 2000
Externally publishedYes


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