Neutron diffraction study of polycrystalline 4He in a porous medium

I. V. Kalinin; E. I. Kats; M. Koza; V. V. Lauter; H. Lauter; A. V. Puchkov

doi:10.1134/S0021364013170062

Neutron diffraction study of polycrystalline ⁴He in a porous medium

I. V. Kalinin, E. I. Kats, M. Koza, V. V. Lauter, H. Lauter, A. V. Puchkov

Reflectometry

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Abstract

The elastic (diffraction) component of the neutron scattering cross section, which carries information on the atomic structure of solid helium confined in silica aerogel, has been studied. Analysis of the crystalline structure of solid helium in a porous medium, which is determined from the existing neutron diffraction data, indicates that the superfluid phase is localized inside a hexagonal close-packed phase and is not present in a body-centered cubic crystal. It has also been revealed that the addition of the ³He isotope changes the structure of solid helium and hardly affects the formation of a superfluid phase.

Original language	English
Pages (from-to)	233-236
Number of pages	4
Journal	JETP Letters
Volume	98
Issue number	4
DOIs	https://doi.org/10.1134/S0021364013170062
State	Published - Oct 2013

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abstract = "The elastic (diffraction) component of the neutron scattering cross section, which carries information on the atomic structure of solid helium confined in silica aerogel, has been studied. Analysis of the crystalline structure of solid helium in a porous medium, which is determined from the existing neutron diffraction data, indicates that the superfluid phase is localized inside a hexagonal close-packed phase and is not present in a body-centered cubic crystal. It has also been revealed that the addition of the 3He isotope changes the structure of solid helium and hardly affects the formation of a superfluid phase.",

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AU - Kalinin, I. V.

AU - Kats, E. I.

AU - Koza, M.

AU - Lauter, V. V.

AU - Lauter, H.

AU - Puchkov, A. V.

PY - 2013/10

Y1 - 2013/10

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AB - The elastic (diffraction) component of the neutron scattering cross section, which carries information on the atomic structure of solid helium confined in silica aerogel, has been studied. Analysis of the crystalline structure of solid helium in a porous medium, which is determined from the existing neutron diffraction data, indicates that the superfluid phase is localized inside a hexagonal close-packed phase and is not present in a body-centered cubic crystal. It has also been revealed that the addition of the 3He isotope changes the structure of solid helium and hardly affects the formation of a superfluid phase.

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JO - JETP Letters

JF - JETP Letters

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ER -

Neutron diffraction study of polycrystalline ⁴He in a porous medium

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