Accession Number:

AD0713478

Title:

EXPERIMENTAL STUDY OF THE LAMBDA TRANSITION OF LIQUID HELIUM USING FIRST SOUND ATTENUATION.

Descriptive Note:

Technical rept.,

Corporate Author:

CALIFORNIA UNIV LOS ANGELES DEPT OF PHYSICS

Personal Author(s):

Report Date:

1970-09-01

Pagination or Media Count:

89.0

Abstract:

The attenuation of first sound near the lambda point can be interpreted as being due to two phenomena 1 a relaxation process described by Pokrovskii and Khalatnikov occurring only below the lambda point, and having a relaxation time of XiC2 where C2 is the velocity of second sound and Xi is a coherence length of magnitude 1.36 x 10 to the minus 8th power T sub Lambda-T to the minus 23 power cm 2 a critical attenuation which is non-singular and symmetrical about T sub Lambda. Author

Subject Categories:

  • Physical Chemistry
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE