RAYLEIGH-DEBYE SCATTERING OF LIGHT OF ANTHRACENE-CRYSTALS

Light scattering in pure solids is due to the extended discrete variat ion of the dielectric constant. To describe the scattering of light in anthracene crystals the Rayleigh-Debye theory is used. A direct relat ion between the nature of structural defects in molecular solids and t he spatial variation of the dielectric constant is found. On the basis of the relation, the form of the scattering correlation function is d erived. Theoretical relations describing the intensity of light scatte ring in molecular crystals are applied to experimental data concerning the intensity of scattered light in anthracene crystals as a function of wavelength for small angles of scattering. It is found that the di ameter of the scattering centres in anthracene is of the order of few mum with concentration about 10(8) cm-3.