2006/03/20 by Thierry Lambert, Lambert, Thierry, Florence Despetis +7
Environmental Science · Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #Methane Hydrates and Related Phenomena #Quantum, superfluid, helium dynamics #Soft Condensed Matter (cond-mat.soft) #cond-mat.soft
paper · pdf · doi:10.48550/arxiv.cond-mat/0603486
4 pages latex
openalex publication_date 2006/03/20 · arxiv created 2006/12/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report on thermodynamic and optical measurements of the condensation process of 4He in two silica aerogels of same porosity 95%, but different microstructures resulting from different pH during synthesis. For a base-catalyzed aerogel, the temperature dependence of the shape of adsorption isotherms and of the morphology of the condensation process show evidence of a disorder induced transition,in agreement with recent theoretical predictions. This transition is not observed for a neutral-catalyzed aerogel, which we interpret as due to a larger disorder in this case.