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

1979 ◽  
Vol 57 (12) ◽  
pp. 2178-2184 ◽  
Author(s):  
M. J. Clouter ◽  
H. Kiefte ◽  
I. E. Morgan
Keyword(s):  
Brillouin Scattering ◽  
Sound Waves ◽  
Saturated Liquid ◽  
Simple Liquids ◽  
Coexistence Line ◽  
Complete Set ◽  
Liquid Vapor

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.

scholarly journals Transient Process of Non-equilibrium State Occurring in a Saturated Liquid-vapor System

1979 ◽  
Vol 22 (173) ◽  
pp. 1604-1611
Author(s):  
Kyozo AYUKAWA ◽  
Junji OCHI ◽  
Yoshiyuki AOYAMA ◽  
Masayoshi KAJIWARA
Keyword(s):  
Equilibrium State ◽  
Transient Process ◽  
Saturated Liquid ◽  
Non Equilibrium ◽  
Liquid Vapor

Velocity of Sound and Acoustic Attenuation in Pure Gallium Single Crystals

1971 ◽  
Vol 49 (9) ◽  
pp. 1075-1097 ◽  
Author(s):  
K. R. Lyall ◽  
J. F. Cochran
Keyword(s):  
Single Crystals ◽  
Elastic Constants ◽  
Acoustic Waves ◽  
Sound Waves ◽  
Velocity Of Sound ◽  
Velocity Data ◽  
Acoustic Attenuation ◽  
Longitudinal Waves ◽  
Complete Set ◽  
Standing Sound

The velocity of sound for both transverse and longitudinal waves has been measured in single crystals of pure gallium. These velocity data have been used to calculate a complete set of elastic constants for gallium at 273, 77, and 4.2 °K. A survey has also been made of the acoustic attenuation in gallium at approximately 5 MHz over the range 1.5–300 °K. The measurements were made using a transducerless method which utilizes the direct electromagnetic generation of acoustic waves at the surfaces of a metal to excite standing sound waves in a slab-shaped specimen. It is demonstrated that this technique is both convenient and sensitive: changes of 1:106 in the velocity of sound in gallium were found to be readily measurable over the range 1.5–300 °K.

Velocity of high frequency sound waves in oriented DNA fibres and films determined by Brillouin scattering

1979 ◽  
Vol 257 (10) ◽  
pp. 1017-1020 ◽  
Author(s):  
G. Maret ◽  
R. Oldenbourg ◽  
G. Winterling ◽  
K. Dransfeld ◽  
A. Rupprecht
Keyword(s):  
High Frequency ◽  
Brillouin Scattering ◽  
Sound Waves ◽  
High Frequency Sound ◽  
Frequency Sound

Brillouin Scattering in Simple Liquids: Argon and Neon

1969 ◽  
Vol 186 (1) ◽  
pp. 244-254 ◽  
Author(s):  
Paul A. Fleury ◽  
Jean Pierre Boon
Keyword(s):  
Brillouin Scattering ◽  
Simple Liquids

Velocity of Hypersonic Waves in Liquid Oxygen. Part II

1975 ◽  
Vol 53 (18) ◽  
pp. 1727-1733 ◽  
Author(s):  
M. J. Clouter ◽  
H. Kiefte ◽  
I. E. Morgan
Keyword(s):  
Critical Point ◽  
Sound Velocity ◽  
Excellent Agreement ◽  
Boiling Point ◽  
Brillouin Scattering ◽  
Liquid Oxygen ◽  
Normal Boiling Point ◽  
Saturated Liquid ◽  
Ultrasonic Velocities ◽  
Experimental Errors

Thermal Brillouin scattering techniques have been used to determine the velocities of hypersonic (0.2 to 3 GHz) waves in saturated liquid oxygen at temperatures from the normal boiling point (90.19 K) to the critical point (154.58 K). The results are in excellent agreement with corresponding ultrasonic (1.2 MHz, 10 MHz) velocities obtained from the literature, except for temperatures above about 148 K. In this region the hypersonic velocities are lower in magnitude than the ultrasonic velocities, the discrepancy being 4% at 150 K and increasing to 13% at 153.9 K. Since these discrepancies are substantially greater than the estimated experimental errors (±0.5% for the hypersonic velocities, ±0.05% for the ultrasonic velocities) it is concluded that saturated liquid oxygen exhibits a significant negative dispersion in the sound velocity at temperatures immediately below the critical point.

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