A DIFFUSION-MODEL INCORPORATING ANISOTROPIC PROPERTIES

A mathematical model suggested by Orsingher, motivated by possible app licability to diffusion processes in which anisotropic scattering is s ignificant, is reanalyzed. It is shown that the propagator for the ful l multi-dimensional model does not satisfy a telegrapher's equation, a s suggested by Orsingher, but that the propagator for the projection o f motion on any one of the axes does. This can be used to analyze the results of a class of optical scattering measurements.