Dynamic light-scattering measurements on fractal aggregates of colloidal silica show that the mean decay rate (Rayleigh linewidth) of the intensity autocorrelation function scales like q2.7, where q is the momentum transfer. This result is compared to the q³ prediction for percolation clusters and the more complex results derived here for cluster-cluster aggregation.
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Martin et al. (1984) studied this question.
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