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Pressure dependence of vortex tunneling in He II.

Hendry, P. C. and Lawson, N. S. and McClintock, Peter V. E. (1990) Pressure dependence of vortex tunneling in He II. Physica B: Condensed Matter, 165-16 (1). pp. 757-758. ISSN 0921-4526

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Abstract

Measurements of the rate nu at which negative ions nucleate charged vortex rings in isotopically pure superfluid He-4 for electric fields E, temperatures T and pressures P within the ranges 10^3 < E < 10^6 V/m, 75 < T < 500 mK, 12 < P < 23 bar show that the energy barrier impeding the tunneling process is strongly dependent on pressure. Minima observed in nu(T) are ascribed to phonon damping.

Item Type: Article
Journal or Publication Title: Physica B: Condensed Matter
Additional Information: Proceedings of the 19th International Conference on Low Temperature Physics (LT19), Brighton, 16-22 August 1990.
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 32247
Deposited By: Professor P. V. E. McClintock
Deposited On: 18 Mar 2010 15:15
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 17:08
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/32247

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