Resonant enhancement of grazing incidence neutron scattering for the characterization of thin films
Artikel i vetenskaplig tidskrift, 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.
Författare
Adrien Perrichon
Uppsala universitet
STFC Rutherford Appleton Laboratory
Anton Devishvili
Uppsala universitet
Institut Laue-Langevin
Kristina Komander
Uppsala universitet
Gunnar K. Pálsson
Uppsala universitet
Alexei Vorobiev
Institut Laue-Langevin
Uppsala universitet
Rasmus Lavén
Chalmers, Kemi och kemiteknik, Energi och material
Maths Karlsson
Chalmers, Kemi och kemiteknik, Energi och material
M. Wolff
Uppsala universitet
Physical Review B
2469-9950 (ISSN) 2469-9969 (eISSN)
Vol. 103 23 235423Yt/gränsskiktsdynamik undersökt med neutronspridning
Vetenskapsrådet (VR) (2016-06958), 2017-01-01 -- 2020-12-31.
Ämneskategorier
Acceleratorfysik och instrumentering
Atom- och molekylfysik och optik
Annan fysik
DOI
10.1103/PhysRevB.103.235423