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Persistent URL	http://purl.org/net/epubs/work/43443
Record Status	Checked
Record Id	43443
Title	Neutron reflection from a liquid helium surface
Contributors	TR Charlton (STFC Rutherford Appleton Lab.), RM Dalgliesh (STFC Rutherford Appleton Lab.), O Kirichek (STFC Rutherford Appleton Lab.), S Langridge (STFC Rutherford Appleton Lab.), A Ganshin (Lancaster U.), PVE McClintock (Lancaster U.)
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)

Type	Details	URI(s)	Local file(s)	Year
Journal Article	Low Temp Phys 34, no. 4 (2008): 316.	doi:10.1063/1.2908893		2008