ISSN:
1573-7357
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We investigate the behavior of 4 He confined in silica aerogels near the bulk liquid-vapor critical point. Using a new mechanical technique to measure the density of the confined 4 He along isotherms, we find that the density continuously increases from a low density phase up to a dense phase as the pressure is increased up to slightly below the bulk saturated pressure. An hysteretic behavior is observed between emptying and filling, which is not uniquely due to thermal problems. We argue that, our observations are more in favor of some kind of capillary condensation than of a genuine first order phase transition.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1017511426955
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