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The wall potential in the pores of Vycor glass experienced by He-3 quasiparticles in a dilute He-3-He-4 solution.

Reeves, P. A. and Tvalashvili, G. and Brussaard, Peter and Fisher, Shaun N. and Guénault, A.M. and Pickett, George R. (2002) The wall potential in the pores of Vycor glass experienced by He-3 quasiparticles in a dilute He-3-He-4 solution. Journal of Low Temperature Physics, 126 (5-6). pp. 1457-1470. ISSN 0022-2291

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Abstract

We have studied the Fermi fluid, He-3 in (3)'He-(4) He solution, confined within the narrow channels of Vycor glass. Continuous wave NAIR signals were observed in two almost identical coils, one containing bulk solution and the other the solution in Vycor glass. Three different solutions (0.1, 1.6, and 6%) have been studied over the temperature range 3 mK to above I K The measurements relate to two exclusion effects of He-3 from Vycor glass. One concerns potential energy, and we demonstrate the partial exclusion of He-3 independent of concentration as the temperature is lowered from high temperatures down to around 200 mK, thus giving an experimental measure of the van der Waals forces between the wall and the helium. The second effect is the additional quantum exclusion which arises from the influence of quantum wire confinement on the kinetic energy, as the temperature is progressively lowered below 50 mK in the very dilute (0.1%) solution.

Item Type: Article
Journal or Publication Title: Journal of Low Temperature Physics
Uncontrolled Keywords: helium-3 ; helium-4 ; vycor
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 23570
Deposited By: Dr Richard P. Haley
Deposited On: 03 Feb 2009 16:25
Refereed?: Yes
Published?: Published
Last Modified: 17 Jul 2013 10:23
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/23570

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