Abstract
The optical heterodyne spectroscopy of optical Kerr effect (OKE) in liquid carbon disulfide (CS2) was performed under various high pressures using a diamond anvil cell (DAC). The relaxation time of orientation was determined up to 1.20 GPa at 295 K using OKE signals. It increased from 1.6 ps at atmospheric pressure to 10.7ps at 1.20 GPa. Low-frequency light scattering (LFLS) spectra were measured in order to compare the intermolecular dynamical processes in liquid CS2 with those of crystalline CS2. A damped oscillation in OKE is found as a precursor of librational motion observed in crystalline state. This change shows that the intermolecular dynamical processes in the liquid vary gradually to that in crystal with increasing pressures.