Depolarized scattering at a binary liquid critical point
- 15 January 1978
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 68 (2) , 623-627
- https://doi.org/10.1063/1.435785
Abstract
Interferometric and diffraction grating measurements of the depolarized light scattering linewidths in the critical region of a nitroethane‐3 methylpentane liquid mixture reveal a relatively weak dependence of the orientational linewidth on ΔT. Plots of the log of the orientational relaxation time vs log ΔT, logτ=−r logΔT+C, yield r=0.031±0.008 while plots of logτ=r′/T+C′ yield r′=1090±292 K. The wide background in the depolarized spectrum exhibits a HWHM of 30 cm−1 which does not change as the critical point is approached. In addition, the HWHM of the completely polarized 875 cm−1 Raman band of nitroethane was found to be 2.1 cm−1 and also to be insensitive to temperature.Keywords
This publication has 19 references indexed in Scilit:
- The Rayleigh line wing and the coefficient of depolarization of scattered light in critical mixturesOptics Communications, 1977
- The temperature dependence of the Rayleigh line wing and depolarized combinational scattering line widths in critical mixturesOptics Communications, 1977
- Dependence of Bandshape and Depolarization Ratio on SlitwidthApplied Spectroscopy, 1976
- The spectrum of depolarized light scattered from critical mixturesOptics Communications, 1975
- Dielectric behaviour of a molecular liquid mixture in the one-phase precritical regionChemical Physics, 1975
- Concentration Gradients in Nitroethane + 3-Methylpentane near the Liquid-Liquid Critical Solution PointPhysical Review Letters, 1975
- Spectrum of depolarized light scattered from nitroethane-isooctane mixture near its critical pointOptics Communications, 1974
- Effect of third component on liquid-liquid critical pointJournal of Chemical & Engineering Data, 1973
- Dynamics of Concentration Fluctuations Near the Critical Mixing Point of a Binary FluidPhysical Review Letters, 1971
- Tracer Diffusion and Shear Viscosity in the Liquid–Liquid Critical RegionThe Journal of Chemical Physics, 1969