Accession Number : AD0635260
Title : BRILLOUIN SCATTERING IN LIQUIDS.
Descriptive Note : Master's thesis.
Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE
Personal Author(s) : Saito, Theodore Teruo
Report Date : JUN 1966
Pagination or Media Count : 61
Abstract : Light scattered from fluctuations caused by thermally excited sound waves, known as Brillouin scattered light, contains information about the velocity and lifetimes of the sound waves. A study was conducted using a frequency stabilized single mode helium-neon laser with .1 mw of output. Conical optics were used to gather the light. A detailed discussion of the conical optics is included, with attention given to the light gathering ability of the conical optics. Results of the measured velocity and lifetimes show no dispersion of the velocity or attenuation for acetone and water. The frequency dispersion of the velocity and the lifetimes for toluene are reported. It is believed that the light scattered from carbon tetrachloride contains a portion scattered from a second damped mode due to a thermal relaxation in the liquid. Until the spectrum of this light can be determined, accurate measurements of the velocity and lifetimes in carbon tetrachloride cannot be made. (Author)
Descriptors : (*SOUND, SCATTERING), (*LIGHT, SCATTERING), (*LIQUIDS, ACOUSTIC PROPERTIES), LASERS, OPTICAL PHENOMENA, SPECTROSCOPY, VELOCITY, ATTENUATION, WATER, ACETONES, TOLUENES, CARBON TETRACHLORIDE
Subject Categories : Acoustics
Distribution Statement : APPROVED FOR PUBLIC RELEASE