Ref HAL: hal-00257998_v1
Ref Arxiv: 0802.2985
DOI: 10.1209/0295-5075/82/56003
WoS: 000256301100017
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
17 Citations
Résumé:

We report on thermodynamic and optical measurements of the condensation process of $^4$He in three silica aerogels of different microstructures. For the two base-catalysed aerogels, the temperature dependence of the shape of adsorption isotherms and of the morphology of the condensation process show evidence of a disorder driven transition, in agreement with recent theoretical predictions. This transition is not observed for a neutral-catalysed aerogel, which we interpret as due to a larger disorder in this case.

Commentaires: 11 pages