Qualitative Light-Scattering Angular Correlations of Conglomerate Particles
Abstract
The scattering phase functions of micrometer-size glycerol droplets containing spherical latex inclusions undergo random fluctuations with time. We measure scattering intensities in the near-forward and near-backward scattering directions and find them to have strong positive correlations during some time periods and strong negative correlations during other time periods. The characteristic time constants of these correlations are on the order of seconds. We calculate scattering correlations from two types of scattering systems. Correlations from an aggregate of two isolated spheres are generally positive, whereas correlations from a sphere containing a single spherical inclusion may be both positive and negative. Calculations of correlations from our experimental data are consistent with diffusion of inclusions within the host droplet, rather than interference effects between the inclusions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1997
- Accession Number
- ADA332013
Entities
People
- Dat Ngo
- Gorden W. Videen
- Paul Nachman
- Paul Pellegrino
- R. G. Pinnick
Organizations
- United States Army Research Laboratory