New approach to the observation of the condensate fraction in superfluid helium-4

J. W. Halley, C. E. Campbell, Clayton F. Giese, K. Goetz

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

We present a phenomenological analysis of an experiment to observe the condensate fraction of helium-4 by firing low-energy pulses of helium atoms at suspended droplets of the superfluid and observing the resulting emission of helium atoms from the fluid. Emission occurs through a conventional process in which rotons are produced and propagate to the other side of the droplet, and through a second process depending on the existence of the condensate. If A is the area of the incoming beam, the cross section scales with A2 (first process) and A4 (second process), respectively, for small A. Aspects of a fully many body calculation and the performance of such an experiment are briefly discussed.

Original languageEnglish (US)
Pages (from-to)2429-2432
Number of pages4
JournalPhysical Review Letters
Volume71
Issue number15
DOIs
StatePublished - Jan 1 1993

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