Neutron reflection from the surface of normal and superfluid 4He

Autor:	Charlton, T. R., Dalgliesh, R. M., Ganshin, A., Kirichek, O., Langridge, S., McClintock, P. V. E.
Rok vydání:	2007
Předmět:	Condensed Matter - Soft Condensed Matter Condensed Matter - Other Condensed Matter
Druh dokumentu:	Working Paper
Popis:	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 Angstroms 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. Comment: to be published in Low Temperature Physics
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0712.0745 Zobrazit plný text záznamu View this record from Arxiv