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- Title
Fluctuations of Dielectric Constant in a System of Hard Spheres.
- Authors
Kuz’min, V. L.; Romanov, V. P.; Obraztsov, E. P.
- Abstract
The correlation function for fluctuations of a dielectric constant in a latex-like suspension of spherical particles was calculated. An exact analytical expression was derived for the correlation function using the Percus-Yewick approximation for a system of hard spheres. The obtained results made it possible to calculate the indicatrix of single scattering, the extinction coefficient, and the transport mean path. It is shown that, starting with a volume content of about ten percent, the "gas" approximation becomes invalid, and optical parameters begin to depend on concentration in quite a complicated manner. In particular, the extinction length and the mean transport path, which are the basic parameters in describing the coherent effects in multiple scattering, vary nonmonotonically with concentration. It is found that there exists a range of sizes and concentrations of scattering particles in which an effect similar to the emergence of blue phase in liquid crystals can be observed.
- Subjects
SUSPENSIONS (Chemistry); DIELECTRICS; APPROXIMATION theory; LIQUID crystals
- Publication
Optics & Spectroscopy, 2001, Vol 91, Issue 6, p913
- ISSN
0030-400X
- Publication type
Article
- DOI
10.1134/1.1429707