Spatial Distribution of Superfluid Vortices
- 20 December 1971
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 27 (25) , 1703-1706
- https://doi.org/10.1103/physrevlett.27.1703
Abstract
We report accurate measurements of the increase, due to rotation, of the attenuation of second sound in an annulus. The measurements can be explained in detail by a vortex-free-region model in close agreement with theory, assuming a vortex-core parameter of 10 Å at 1.65 K. The range of agreement extends from the vorticity threshold to relatively high angular velocities.Keywords
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