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Roton assisted vortex nucleation in isotopically pure superfluid 4He.

Research output: Contribution to journalJournal article


<mark>Journal publication date</mark>1981
<mark>Journal</mark>Physica B: Condensed Matter
Number of pages2
Pages (from-to)571-572
<mark>Original language</mark>English


Measurements are presented of the rate nu at which negative ions nucleate quantised vortex rings in isotopically pure superfluid 4He for temperatures 0.3 < T < 0.8 K and electric fields 6 x 10^4 < E < 1.5 X 10^6 V/m. It is shown that there is a temperature dependent component of nu, which is accurately proportional to the thermal roton density provided that due allowance is made for the drag arising from ion-excitation scattering.

Bibliographic note

Proceedings of the 16th International Conference on Low Temperature Physics, Los Angeles, 19-25 August 1981.