Depolarized Brillouin spectrum of liquid CS2

TLDR: In this article, the Brillouin doublet was observed in liquid CS2 and the half-widths increased from 11 to 19 GHz, yielding orientational relaxation times of 14×10−12 to 8× 10−12 sec.

Abstract: The depolarized doublet found in the Brillouin spectra of many molecular liquids has been observed in liquid CS2. This doublet is best resolved at 162°K (near the freezing point); it broadens rapidly with increasing temperature and is unresolved at temperatures higher than 192°K. In this temperture range, the half‐widths increase from 11 to 19 GHz, yielding orientational relaxation times of 14×10−12 to 8×10−12 sec, respectively. The observed spectra are in good agreement with the predictions of hydrodynamic (Rytov) and microscopic (Keyes and Kivelson) theories.