Vortex nucleation in superfluid sup 4 He

Conference · Wed Oct 25 04:00:00 EDT 1989 · AIP Conference Proceedings (American Institute of Physics); (USA)

OSTI ID:6902678

Bowley, R M ^[1]

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1. Department of Physics, University of Nottingham, Nottingham NG7 2RD UK (GB)

Muirhead, Vinen and Donnelly have argued that vortex nucleation by negative ions in superfluid {sup 4}He involves small vortex loops emerging in the equatorial plane of the ion. These loops have to overcome an energy barrier of about 3 {degree}K. They do this either by thermal activation (involving a phonon or roton) or by tunnelling. Recent experiments have observed this thermally activated process and found an energy barrier of order 3 {degree}K.

• OSTI ID: 6902678
• Report Number(s): CONF-8904257--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (USA) Journal Volume: 194:1
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DIFFERENTIAL EQUATIONS
ELECTRIC FIELDS
EQUATIONS
EQUATIONS OF MOTION
EVEN-EVEN NUCLEI
FLUIDS
HELIUM 4
HELIUM II
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MAGNETIC FIELDS
NUCLEATION
NUCLEI
PARTIAL DIFFERENTIAL EQUATIONS
PHONONS
PRESSURE DEPENDENCE
QUANTUM FLUIDS
QUASI PARTICLES
ROTONS
STABLE ISOTOPES
SUPERFLUIDITY
VORTICES