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Quasi-specular reflection of cold neutrons from nano-dispersed media at above-critical angles

Abstract : We predicted and observed for the first time the quasi-specular albedo of cold neutrons at small incidence angles from a powder of nanoparticles. This albedo (reflection) is due to multiple neutron small-angle scattering. The reflection angle as well as the half-width of angular distribution of reflected neutrons is approximately equal to the incidence angle. The measured reflection probability was equal to ~30% within the detector angular size that corresponds to 40-50% total calculated probability of quasi-specular reflection.
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http://hal.in2p3.fr/in2p3-00422982
Contributor : Emmanuelle Vernay <>
Submitted on : Friday, October 9, 2009 - 8:44:41 AM
Last modification on : Thursday, November 19, 2020 - 12:58:40 PM

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R. Cubitt, E.V. Lychagin, A.Yu. Muzychka, G.V. Nekhaev, V.V. Nesvizhevsky, et al.. Quasi-specular reflection of cold neutrons from nano-dispersed media at above-critical angles. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Elsevier, 2010, 622, pp.182-185. ⟨10.1016/j.nima.2010.07.049⟩. ⟨in2p3-00422982⟩

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