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:
Journal Article
Journal or Publication Title:
Journal de Physique
Additional Information:
Proceedings of the 15th International Conference on Low Temperature Physics, Grenoble, 1978.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2200
Subjects:
?? general engineeringengineering(all)qc physics ??
ID Code:
32509
Deposited On:
12 Apr 2010 10:37
Refereed?:
Yes
Published?:
Published
Last Modified:
16 Jul 2024 08:35