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We have performed simultaneous adsorption isotherm and small angle x-ray scattering (SAXS) measurements of 4He adsorption into 98% porous aerogel at 3.5K. Measurements indicate a two phase coexistence at vapor pressures slightly below the bulk liquid-vapor equilibrium point. SAXS data are interpreted according to a model which consists of the coexistence of a film phase where the aerogel strands...
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