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First-Sound Attenuation and Viscosity of Superfluid 3He-B

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DOI to cite this document:
Eska, G. ; Neumaier, K. ; Schoepe, Wilfried ; Uhlig, K. ; Wiedemann, W. ; Wölfle, P.
Date of publication of this fulltext: 21 Dec 2010 06:28


The attenuation of first sound in normal and superfluid 3He in a cylindrical resonator has been measured from 40 kHz to 300 kHz at 8 and 28 bars. In the B phase a decreasing viscosity down to the lowest temperature (0.5Tc) is observed. In the normal phase the viscosity agrees with previously reported values. The data analysis is based on a recent theory of sound propagation in superfluid 3He in a resonator.

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