Neutron reflection from the liquid helium surface.

Charlton, T. R. and Dalgliesh, R. M. and Ganshin, A. and Kirichek, O. and Langridge, S. and McClintock, Peter V. E. (2008) Neutron reflection from the liquid helium surface. Low Temperature Physics, 34 (4). pp. 316-319. ISSN 1090-6517

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The reflection of neutrons from a helium surface has been observed for the first time. The 4He surface is smoother in the superfluid state at 1.54 K than in the case of the normal liquid at 2.3 K. In the superfluid state we also observe a surface layer ~200 Å thick which has a subtly different neutron scattering cross-section, which may be explained by an enhanced Bose-Einstein condensate fraction close to the helium surface. The application of neutron reflectometry described in this paper creates new and exciting opportunities for the surface and interfacial study of quantum fluids.

Item Type: Journal Article
Journal or Publication Title: Low Temperature Physics
Uncontrolled Keywords: /dk/atira/pure/researchoutput/libraryofcongress/qc
Departments: Faculty of Science and Technology > Physics
ID Code: 22893
Deposited By: Professor P. V. E. McClintock
Deposited On: 06 Jan 2009 17:57
Refereed?: Yes
Published?: Published
Last Modified: 18 Aug 2019 00:40

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