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Roton assisted vortex nucleation in isotopically pure superfluid 4He.

Bowley, R. M. and McClintock, Peter V. E. and Moss, F. E. and Nancolas, G. G. (1981) Roton assisted vortex nucleation in isotopically pure superfluid 4He. Physica B: Condensed Matter, 107. pp. 571-572. ISSN 0921-4526

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Abstract

Measurements are presented of the rate nu at which negative ions nucleate quantised vortex rings in isotopically pure superfluid 4He for temperatures 0.3 < T < 0.8 K and electric fields 6 x 10^4 < E < 1.5 X 10^6 V/m. It is shown that there is a temperature dependent component of nu, which is accurately proportional to the thermal roton density provided that due allowance is made for the drag arising from ion-excitation scattering.

Item Type: Article
Journal or Publication Title: Physica B: Condensed Matter
Additional Information: Proceedings of the 16th International Conference on Low Temperature Physics, Los Angeles, 19-25 August 1981.
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 32492
Deposited By: Professor P. V. E. McClintock
Deposited On: 12 Apr 2010 09:08
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 17:11
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/32492

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