Temperature-Dependent Spatial Order in Superfluid and Normal ${}^{4}{He}$

Publisher Website

31 December 1979

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 43 (27) , 2006-2009
https://doi.org/10.1103/physrevlett.43.2006

Abstract

Measurements of the structure factor

S (k)

for

{}^{4}{He}

at constant density above and below

T_{λ}

are reported. The results show a clear loss of spatial order on cooling through

T_{λ}

. Application of the theory of Cummings, Hyland, and Rowlands to the data allows a measurement of the condensate fraction for He II.

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