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Evidence for an energy barrier impeding the creation of quantized vortices in He II.

Research output: Contribution to journalJournal article


<mark>Journal publication date</mark>1987
<mark>Journal</mark>Japanese Journal of Applied Physics
Issue numberSupple
Number of pages2
Pages (from-to)73-74
<mark>Original language</mark>English


The rate nu at which negative ions create quantized vortex rings in isotopically pure He II has been measured for temperatures 70 < T < 500 mK, pressures 12 < P < 19 bar and electric fields 10^4 < E < 10^S V/m. The result can be taken to imply the existence of an energy barrier impeding the nucleation process of ~3K.

Bibliographic note

Proceedings of the 18th lnternational Conference on Low Temperature Physics, Kyoto, 1987