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Persistent superfluid flow.

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<mark>Journal publication date</mark>10/01/1975
Issue number5487
Number of pages2
Pages (from-to)93-94
Publication StatusPublished
<mark>Original language</mark>English


In a recent communication to Physical Review Letters (33, 1073; 1974), Galkicwicz and Hallock report the first really satisfying demonstration of a persistent superfluid current in a helium film. In their experiment, which was carried out at the Amherst campus of the University of Massachusetts, they started the 4He film moving at a velocity of about 5 cm/s around a closed path some 40 cm in length, and were then able to show that the energy of flow did not measurably diminish over a period of several hours.