Experimental Approbation of Reference Layer Method in Resonant Neutron Reflectometry

—The first application of resonant neutron scattering at Gd atoms for the experimental determination of the phase of the reflection coefficient in neutron reflectometry is presented in this paper. The surface of the sample studied was covered by the reference Gd layer, for which the scattering lengt...

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Bibliographic Details
Published in:Physics of metals and metallography 2019-09, Vol.120 (9), p.838-843
Main Authors: Nikova, E. S., Salamatov, Yu. A., Kravtsov, E. A., Makarova, M. V., Proglyado, V. V., Ustinov, V. V., Bodnarchuk, V. I., Nagorny, A. V.
Format: Article
Language:English
Subjects:
Chemistry and Materials Science
Electrical and Magnetic Properties
Energy measurement
Gadolinium
Materials Science
Metallic Materials
Neutron scattering
Neutrons
Reflectance
Reflectometry
Specular reflection
Thermal neutrons
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Summary:—The first application of resonant neutron scattering at Gd atoms for the experimental determination of the phase of the reflection coefficient in neutron reflectometry is presented in this paper. The surface of the sample studied was covered by the reference Gd layer, for which the scattering length of thermal neutrons is highly energy-dependent. After measuring the coefficient of specular reflection of neutrons at three different wavelengths of each impulse, we were able to resolve the phase problem of the neutron reflectometry and determine the absolute magnitude and phase of the complex reflection coefficient from an unknown part of sample structure.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X19090102