QUANTITATIVE LIGHT-SCATTERING ANGULAR-CORRELATIONS OF CONGLOMERATE PARTICLES

A quantitative analysis of the fluctuations in the scattering associat ed with micrometer-size glycerol droplets that contain spherical latex inclusions are performed. Scattering intensities at two angles (the n ear-forward and the near-backward directions) are measured as function s of time. We analyze these signals using two techniques. We find that calculated autocorrelation time constants associated with these signa ls are not consistent with current models based on interference of lig ht scattering from latex inclusions that exhibit Stokes-Einstein diffu sion. The intensity fluctuations at different scattering angles displa y extended periods of both positive and negative correlations with cha racteristic time constants of the order of seconds. The time constants associated with the cross correlations provide information on the phy sical parameters of the inclusions. (C) 1997 Optical Society of Americ a.