Superfluid Vortex, Trapping Neutral Impurities
Open Access
- 1 June 1969
- journal article
- Published by Oxford University Press (OUP) in Progress of Theoretical Physics
- Vol. 41 (6) , 1401-1415
- https://doi.org/10.1143/ptp.41.1401
Abstract
Structure and energy of a superfluid vortex line and a neutral impurity (He3) trapped by it are investigated in the Hartree-Fock approximation. In dilute gas the shape of the impurity is prolate along the vortex line, while in dense gas it becomes more spherical. In liquid helium the ratio of the axes is estimated at √0.842 and the binding energy at 3.5°K. A rough estimate of the saturation density is given. It is pointed out that at this density the tension has decreased to 60% of that in pure He4.Keywords
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