Abstract

The behavior of the hypersonic Debye waves has been investigated in three viscous liquids by means of the Brillouin effect. The three liquids investigated, glycerin, ethylene glycol, and normal octyl alcohol all give the Landau–Placzek ratio of I_c/2I_B = γ − 1 at sufficiently high temperature so that viscosity has a negligible effect. It is found that the I_c/2I_B ratio is a linear function of viscosity for viscosities below a few poises. In glycerin, however, measurements were made for a viscosity as high as 10³ poises and it was found that the attenuation of the Debye waves increased very slowly when the viscosity was increased from 2.5 poises to 10³ poises.

© 1966 Optical Society of America

Brillouin Spectra of Liquids Using He–Ne Laser*

D. H. Rank, Edward M. Kiess, Uwe Fink, and T. A. Wiggins
J. Opt. Soc. Am. 55(8) 925-927 (1965)

Depolarization of the Components of Rayleigh Scattering in Liquids*

D. H. Rank, Amos Hollinger, and D. P. Eastman
J. Opt. Soc. Am. 56(8) 1057-1058 (1966)

Stimulated Brillouin Effect in High-Pressure Gases*

D. H. Rank, T. A. Wiggins, R. V. Wick, D. P. Eastman, and A. H. Guenther
J. Opt. Soc. Am. 56(2) 174-176 (1966)

Brillouin Scattering from Some Low-Temperature Liquids

L. Y. Wong and A. Anderson
J. Opt. Soc. Am. 62(9) 1112-1116 (1972)

Intensity and Polarization of Brillouin Spectra*

D. H. Rank, J. S. McCartney, and G. J. Szasz
J. Opt. Soc. Am. 38(3) 287-290 (1948)