Proceedings of the National Academy of Sciences of the United States of America
First-order perturbation expressions are developed for the first cumulant (initial time derivative) of the dynamic structure factor observable by photon-correlation measurements of the light scattered by flexible chain molecules in solution. A dimensionless coefficient C, which measures the initial departure of the first cumulant from proportionality to the square of the scattering vector, is found to be only slightly altered by excluded-volume effects.
Tanaka, Genzo and Stockmayer, Walter H., "Excluded-Volume Effect on Quasi-Elastic Light Scattering by Flexible Macromolecules" (1982). Open Dartmouth: Faculty Open Access Articles. 1243.