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Possible influence of thermal rotons on vortex nucleation by negative ions in pressurised HeII below 1 K.

Stamp, P. C. E. and McClintock, Peter V. E. and Fairbairn, W. M. (1979) Possible influence of thermal rotons on vortex nucleation by negative ions in pressurised HeII below 1 K. Journal of Physics C: Solid State Physics, 12 (15). L589-L593. ISSN 0022-3719

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Abstract

A new technique has been developed for measuring the nucleation rate nu of negatively charged vortex rings in HeII when the temperature T, pressure P and electric field E are such that the bare-ion drift velocity is limited principally by roton emission. For P = 25 bar, E = 7.9 x l0^5 V/m and 0.7 < T < 0.9 K, the relation nu(T) = 8.0 x l0^7 exp( - 6.2/T) was obtained, which suggests that the magnitude of nu may be closely related to the thermal roton density

Item Type: Article
Journal or Publication Title: Journal of Physics C: Solid State Physics
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 32503
Deposited By: Professor P. V. E. McClintock
Deposited On: 12 Apr 2010 10:15
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 17:11
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/32503

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