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X-ray scattering measurements of helium adsorption into silica aerogel

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 interprete... Full description

Published: New York, Kluwer Academic/Plenum Publishers, 2000
Kongresse: International Symposium on Quantum Fluids and Solids 2000 2000.06.06-2000.06.11 Minneapolis, MN, US
QFS 2000 2000.06.06-2000.06.11 Minneapolis, MN, US
International Symposium on Quantum Fluids and Solids 2000.06.06-2000.06.11 Minneapolis, MN, US
QFS 2000 2000.06.06-2000.06.11 Minneapolis, MN, US
Contained in: Journal of Low Temperature Physics Vol. 121, No. 5-6 (2000), p. 591-596
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ISSN: 0022-2291
Additional Keywords: ADSORPTION
AEROGEL
DAMPFDRUCK:MECHANIK
FLUESSIGHELIUM
FLUESSIGKEITSFILM
KIESELGEL
KLEINWINKELSTREUUNG
MATHEMATISCHES-MODELL
MINERALOGISCHE-ZUSAMMENSETZUNG
PHASENGLEICHGEWICHT
POROESER-WERKSTOFF
ROENTGENSTREUUNG
Notes: Copyright: Metadaten: TEMA, Copyright WTI-Frankfurt eG
Copyright: (C) Alle Rechte beim Herausgeber
Physical Description: 6 Seiten, 9 Quellen
PPN (Catalogue-ID): WTI038053837
Note: WTI TEMA DB
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520 |a 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 are coated with a liquid film and a filled-pore phase were the pores defined by neighboring strands are filled with liquid. 
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