Dynamic light scattering at the nonequilibrium crystal-melt interface in cyclohexanol

Abstract

The intensity autocorrelation function of laser light quasielastically scattered at the growing crystal-melt interface of cyclohexanol was found to fit the single-exponential form previously found with ice and salol, indicating diffusional scattering. The diffusion constant D was found to vary in the range (0.2--0.9)\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}10}$ ${\mathrm{cm}}^{2}$/sec. Scattering was observed to persist for times on the order of 6 h after growth was stopped. A similar result was found in salol, but the possible interpretations are shown to differ fundamentally for these two materials.