Resonant enhancement of grazing incidence neutron scattering for the characterization of thin films
Journal article, 2021
We use signal enhancement in a quantum resonator for the characterization of a thin layer of vanadium hydride using neutron reflectometry and demonstrate that pressure-concentration isotherms and expansion coefficients can be extracted from the measurement of totally externally reflected neutrons only. Moreover, a consistent data analysis of the attenuation cross section allows us to detect and quantify off-specular and small angle scattering. As our experiments are effective direct beam measurements, combined with resonant signal enhancement, counting times become considerably reduced. This allows us to overcome the challenges resulting from the comparatively low brilliance of neutron beams for grazing incidence scattering experiments. Further, we discuss the potential of resonant enhancement to increase any scattering, which is of particular interest for grazing incidence small angle neutron scattering and spectroscopy.
Author
Adrien Perrichon
Uppsala University
STFC Rutherford Appleton Laboratory
Anton Devishvili
Uppsala University
Institut Laue-Langevin
Kristina Komander
Uppsala University
Gunnar K. Pálsson
Uppsala University
Alexei Vorobiev
Institut Laue-Langevin
Uppsala University
Rasmus Lavén
Chalmers, Chemistry and Chemical Engineering, Energy and Material
Maths Karlsson
Chalmers, Chemistry and Chemical Engineering, Energy and Material
M. Wolff
Uppsala University
Physical Review B
2469-9950 (ISSN) 2469-9969 (eISSN)
Vol. 103 23 235423Surface/interface dynamics investigated with neutron scattering
Swedish Research Council (VR) (2016-06958), 2017-01-01 -- 2020-12-31.
Subject Categories
Accelerator Physics and Instrumentation
Atom and Molecular Physics and Optics
Other Physics Topics
DOI
10.1103/PhysRevB.103.235423