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Persistent URL http://purl.org/net/epubs/work/43443
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Record Id 43443
Title Neutron reflection from a liquid helium surface
Abstract The reflection of neutrons from a helium surface is 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.
Organisation ISIS , ISIS-CRISP , STFC
Keywords Physics , neutron reflection , liquid helium , SSTD 2008-2009
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Language English (EN)
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Journal Article Low Temp Phys 34, no. 4 (2008): 316. doi:10.1063/1.2908893 2008