Accession Number:

AD0662870

Title:

INVESTIGATION OF THE ULTRASONIC ATTENUATION IN IRRADIATED METALS.

Descriptive Note:

Final rept. 15 Jan 64-15 Nov 66,

Corporate Author:

TUFTS UNIV MEDFORD MASS DEPT OF PHYSICS

Report Date:

1967-06-15

Pagination or Media Count:

96.0

Abstract:

Measurements of the ultrasonic attenuation of phonons in samples of pure copper and aluminum were undertaken to determine the effects of gamma irradiation on the electron-phonon interaction and the phonon-dislocation interaction in normal metals. From these measurements the absolute electronic attenuation was determined, as well as the temperature dependence of the electron mean free path at low temperatures. The measurements revealed that the ultrasonic attenuation in copper is orientation-dependent, and that the attenuation in aluminum is orientation-independent. The electron-phonon interaction in copper is orientation-dependent the electron-phonon attenuation in aluminum is orientation-independent. The dislocation-phonon interaction in copper is also orientation-dependent, whereas in aluminum no dislocation-phonon interaction was detected. Author

Subject Categories:

  • Metallurgy and Metallography
  • Radioactivity, Radioactive Wastes and Fission Products
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE