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Precision second-sound velocity measurements in helium II

Precision second-sound velocity measurements in helium II The velocity of second soundu 2 in helium II under its saturated vapor pressure was measured in an acoustic resonator with a typical precision of 0.07% and was found to agree with existing measurements. Data were taken from 1.135 to 2.09 K, with special attention given to the local maximum near 1.65 K, which can be used as a temperature reference point. A least squares cubic spline fit is given to the present data and selected data of other authors givingu 2 from 0.55 K to within 60 µK of Tλ. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Low Temperature Physics Springer Journals

Precision second-sound velocity measurements in helium II

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References (10)

Publisher
Springer Journals
Copyright
Copyright
Subject
Physics; Condensed Matter Physics; Characterization and Evaluation of Materials; Magnetism, Magnetic Materials
ISSN
0022-2291
eISSN
1573-7357
DOI
10.1007/BF00682305
Publisher site
See Article on Publisher Site

Abstract

The velocity of second soundu 2 in helium II under its saturated vapor pressure was measured in an acoustic resonator with a typical precision of 0.07% and was found to agree with existing measurements. Data were taken from 1.135 to 2.09 K, with special attention given to the local maximum near 1.65 K, which can be used as a temperature reference point. A least squares cubic spline fit is given to the present data and selected data of other authors givingu 2 from 0.55 K to within 60 µK of Tλ.

Journal

Journal of Low Temperature Physics – Springer Journals

Published: Nov 6, 2004

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