Accession Number : ADA111842

Title :   Propagation of Sound in Matter.

Descriptive Note : Interim summary rept. 1 Oct 68-1 Feb 82,


Personal Author(s) : Rudnick,Isadore

PDF Url : ADA111842

Report Date : Mar 1982

Pagination or Media Count : 44

Abstract : Contents: Ultrasonic Attenuation in Liquid Helium at 1 GHz; Size Effects in Liquid Helium II as Measured by Fourth Sound and The Attenuation of Fourth Sound; Third Sound in Unsaturated Films of Superfluid Helium; A Specific Heat and Fourth Sound Measurement of Size Effects in Liquid Helium; Experimental Study of the Lambda Transition of Liquid Helium Using First Sound Attenuation; Attenuation of Third Sound in Liquid Helium and the Stability of Multiply Quantized Persistent Circulations of a Thin Helium Film in the Landay Region; Hypersonic Attenuation in the Vicinity of the Superfluid Transition of Liquid Helium; Investigation of Persistent Current States in Rotating Superfluid Helium Contained in Superleak Using Doppler-Shifted Fourth Sound; Investigation of the thickness and Critical Velocity of a Moving Unsaturated Superfluid Film Using Doppler Shifted Third Sound; Third Sound Velocity and Attenuation Below 1.2 Degrees Kelvin; A Study of the Trapping of Superfluid Persistent Currents in Superleaks; Non-Linear Parametric Generation of Sound by Resonant Mode Conversion; A Study of Persistent Currents in Superfluid 4He.

Descriptors :   *Superfluidity, *Liquid helium, Acoustic waves, Thermal radiation, Cryogenics, Experimental data, Abstracts, Reports, Acoustic attenuation, Phase transformations, Thin films, Motion

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE