Light Scattering Study of Ultrasonic Relaxation in Liquid Furan-Cyclohexane Mixtures

Abstract

Study of ultrasonic relaxation in pure liquids provides an useful means to observe vibration-translation (v-t) energy transfer in polyatomic molecules, but it is almost blind to vibration=vibration (v-v) transfer process. If experiments are made in mixtures, however, one can obtain the speed of v-v process between different molecules since the contribution of v-v coupling to the whole relaxation process would be dependent on the concentration. For this purpose, it is required to carry out measurement over a wide frequency range and to determine relaxation frequency at each concentration.