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https://apo.ansto.gov.au/dspace/handle/10238/4978
Title: | Dynamical theory calculations of spin-echo resolved grazing-incidence scattering from a diffraction grating |
Authors: | Ashkar, R Stonaha, P Washington, AL Shah, VR Fitzsimmons, MR Maranville, B Majkrzak, CF Lee, WT Schaich, WL Pynn, R |
Keywords: | Neutrons Scattering Crystals Atoms Films Electrons |
Issue Date: | 1-Jun-2010 |
Publisher: | Wiley-Blackwell |
Citation: | Ashkar, R., Stonaha, P., Washington, A. L., Shah, V. R., Fitzsimmons, M. R., Maranville, B., Majkrzak, C. F., Lee, W. T., Schaich, W. L., & Pynn, R. (2010). Dynamical theory calculations of spin-echo resolved grazing-incidence scattering from a diffraction grating. Journal of Applied doi:10.1107/s0021889810010642 |
Abstract: | Neutrons scattered or reflected from a diffraction grating are subject to a periodic potential analogous to the potential experienced by electrons within a crystal. Hence, the wavefunction of the neutrons can be expanded in terms of Bloch waves and a dynamical theory can be applied to interpret the scattering phenomenon. In this paper, a dynamical theory is used to calculate the results of neutron spin-echo resolved grazing-incidence scattering (SERGIS) from a silicon diffraction grating with a rectangular profile. The calculations are compared with SERGIS measurements made on the same grating at two neutron sources: a pulsed source and a continuous wave source. In both cases, the spin-echo polarization, studied as a function of the spin-echo length, peaks at integer multiples of the grating period but there are some differences between the two sets of data. The dynamical theory explains the differences and gives a good account of both sets of results. © 2010, Wiley-Blackwell. |
Gov't Doc #: | 5132 |
URI: | http://dx.doi.org/10.1107/s0021889810010642 http://apo.ansto.gov.au/dspace/handle/10238/4978 |
ISSN: | 0021-8898 |
Appears in Collections: | Journal Articles |
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