Cf. Giese et al., EXPERIMENTAL CONSTRAINTS ON THE OBSERVATION OF THE CONDENSATE FRACTION IN SUPERFLUID HE-4 BY A NEW METHOD, Physica. B, Condensed matter, 194, 1994, pp. 535-536
A new method has been proposed for observation of the condensate fract
ion of superfluid helium four. This paper discusses the experimental c
onsiderations involved in carrying out the measurement.