EXPERIMENTAL STUDY OF THE LAMBDA TRANSITION OF LIQUID HELIUM USING FIRST SOUND ATTENUATION.
CALIFORNIA UNIV LOS ANGELES DEPT OF PHYSICS
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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
- Physical Chemistry