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Rings among the rotons : measurements of the vortex nucleation rate for negative ions whose drift velocities are limited by roton emission.

Allum, D. R. and McClintock, Peter V. E. (1978) Rings among the rotons : measurements of the vortex nucleation rate for negative ions whose drift velocities are limited by roton emission. Journal de Physique, Colloq. pp. 174-175. ISSN 0302-0738

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Abstract

We have measured vortex ring nucleation rates nu for negative ions moving in He II under the influence of electric fields 0.8 < E < 12 kV/cm, for temperatures 0.4 < T < 0.6 K and a pressure of 25 bar. For E > 5 kV/cm, the experimental data are well described by a theory due to Bowley. An anomalous dependence of nu on T found at lower lower E is attributed to the influence of isotopic impurities.

Item Type: Article
Journal or Publication Title: Journal de Physique
Additional Information: Proceedings of the 15th International Conference on Low Temperature Physics, Grenoble, 1978.
Subjects: ?? qc ??
Departments: Faculty of Science and Technology > Physics
ID Code: 32509
Deposited By: Professor P. V. E. McClintock
Deposited On: 12 Apr 2010 11:37
Refereed?: Yes
Published?: Published
Last Modified: 10 Oct 2017 16:47
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/32509

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