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.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
L. D. Landau,J. Phys. Moscow 5, 71 (1941).
I. Rudnick,New Directions in Physical Acoustics (International School of Physics, Vol. LXIII; Soc. Italiana di Fisica, Bologna, 1976).
C. F. Barenghi, R. J. Donnelly, and W. F. Vinen,J. Low Temp. Phys. 52, 189 (1983).
C. F. Barenghi, Ph. D. Thesis, University of Oregon (1982), unpublished.
N. Giordano,J. Low Temp. Phys. 55, 495 (1984).
G. K. White,Experimental Techniques in Low-Temperature Physics (Clarendon, Oxford, 1979), p. 377.
H. Van Dijk, M. Durieux, J. R. Clement, and J. K. Logan,The 1958 4 He Scale of Temperatures (National Bureau of Standards (U.S.) Monograph No. 10; U.S. GPO, Washington, D.C., 1960).
W. Y. Tam and G. Ahlers,J. Low Temp. Phys. 66, 173 (1987).
J. Heiserman, J. P. Hulin, J. Maynard, and I. Rudnick,Phys. Rev. B 14, 3862 (1976).
V. P. Peshkov,Sov. Phys. JETP 11, 580 (1960).
D. Greywall and G. Ahlers,Phys. Rev. A 7, 2145 (1973).
R. J. Donnelly, J. A. Donnelly, and R. N. Hills,J. Low Temp. Phys. 44, 471 (1981).
About this article
Cite this article
Wang, R.T., Wagner, W.T. & Donnelly, R.J. Precision second-sound velocity measurements in helium II. J Low Temp Phys 68, 409–417 (1987). https://doi.org/10.1007/BF00682305
- Vapor Pressure
- Reference Point
- Magnetic Material
- Local Maximum