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Vortex nucleation in isotopically pure superfluid 4He.

Bowley, R. M. and McClintock, Peter V. E. and Moss, F. E. and Stamp, P. C. E. (1980) Vortex nucleation in isotopically pure superfluid 4He. Physical Review Letters, 44 (3). pp. 161-164. ISSN 1079-7114

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The first experimental measurements of the rate nu at which vortex rings are nucleated by negative ions in isotopically pure superfiuid 4He are presented. It is found that nu is considerably smaller than in the ordinary well helium employed in earlier work. By interpreting the data in terms of a generalized Landau argument values of the critical velocity vv for vortex nucleation and of a characteristic nucleation rate R0 as functions of pressureP in 16 < P < 25 bar are deduced.

Item Type: Article
Journal or Publication Title: Physical Review Letters
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 32499
Deposited By: Professor P. V. E. McClintock
Deposited On: 12 Apr 2010 09:53
Refereed?: Yes
Published?: Published
Last Modified: 07 Jan 2015 14:33
Identification Number:

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