RELAXATION OF OPTICAL ORIENTATIONAL EFFECTS IN DISPERSIONS WITH NON-RAYLEIGH PARTICLES

Relaxations of dichroism and birefringence and changes in the transmit tance value after the orienting held was cancelled out were theoretica lly analyzed for monodisperse and polydisperse suspensions. The standa rd integral equation of polydisperse relaxation with an exponential ke rnel was shown to be valid for the Rayleigh particles with any degree of initial ordering; for non-Rayleigh particles, this equation may be applied only in the case of weak orienting fields. Experimental exampl es representing nonexponential relaxation of an electrooptical turbidi metric signal for a monodisperse suspension of bacterial cells ate giv en.