Russell J. Donnelly
Observed Properties of Liquid Helium
The displacement and healing lengths and vortex core parameter of helium II are discussed in the appendix to a review article by Barenghi, Donnelly and Vinen 1. We give their spline fit and recommended values to the displacement length and recommended values of the core parameter a.
Table 20.1. Knots and coefficients for the displacement length in helium II as a function of log10(1-T/T). The displacement length is given by 10-8 times 10S where S is the value returned by the spline. The core parameter is 0.45 times the displacement length
Table 20.2. Table of recommended values of the displacement length of helium II.
C. F. Barenghi, R. J. Donnelly, and W. F. Vinen, “Friction on Quantized Vortices in Helium II. A Review,” J. Low Temp. Phys. 52, 189-247 (1983).
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