Brillouin scattering studies of simple liquids: O2, N2, CO, CH4

Abstract

The technique of Brillouin scattering has been used to obtain new velocity and attenuation data for thermal sound waves in liquids O2, N2, CO, and CH4. Measurements of Brillouin shift and linewidth were made along the liquid–vapor coexistence line in each case and, when combined with previously published results, comprise a reasonably complete set of data covering the saturated liquid ranges of all four cryogenic materials. Where possible, comparisons are made with corresponding ultrasonic data.