Abstract

We present neutron scattering measurements of Bose-Einstein condensation (BEC) in liquid 4He confined in Vycor. The data show clear evidence of a condensate in Vycor with a condensate fraction comparable to that of bulk superfluid 4He, approximately 7.5% at low temperature and SVP. The temperature dependence of n0(T) is also similar to that in the bulk with critical temperature for BEC, TBEC, in the range 1.80<TBEC<2.05 K. The data are not accurate enough to show whether TBEC for Vycor is the same or greater than the depressed critical temperature for superfluidity, Tc=1.95 K.

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