Dynamical theory: Application to spin-echo resolved grazing incidence scattering from periodic structures

Dynamical theory: Application to spin-echo resolved grazing incidence scattering from periodic structures

Ashkar, R.
Schaich, W.L.
De Haan, V.O.
Van Well, A.A.
Dalgliesh, R.
Plomp, J.
Pynn, R.

Applied Sciences

RRR/Radiation, Radionuclides and Reactors

2011-11-30

Neutron spin-echo resolved grazing incidence scattering (SERGIS) measurements performed on a silicon diffraction grating with a rectangular profile were shown in our previous publications to be well explained by dynamical theory calculations. The theory is based on a Bloch wave expansion of the neutron wavefunction in the periodic layer of the grating, which includes all multiple scattering within that layer. Calculations show that the spin-echo polarization should be very sensitive to the scattering geometry (i.e., incident angle, sample alignment and beam divergence) and the sample specifications (i.e., grating period, groove depth). To test these predictions, SERGIS measurements have been performed on a set of gratings with different specifications in various scattering geometries. In all cases, simulations based on the dynamical theory, with all the parameters set to their known values, are in good agreement with the collected data.

diffraction gratings
neutron diffraction
neutron spin echo
silicon
wave functions

http://resolver.tudelft.nl/uuid:2887eac5-85cf-42dd-b52a-a5e8e71241f7

https://doi.org/10.1063/1.3661162

American Institute of Physics

0021-8979

http://link.aip.org/link/doi/10.1063/1.3661162

Journal of Applied Physics, 110 (10), 2011

Institutional Repository

journal article

(c) 2011 The Author(s)
American Institute of Physics