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Quasi-specular albedo of cold neutrons from powder of nanoparticles

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arxiv 0910.1469 v1 pith:3EKM5I7H submitted 2009-10-08 nucl-ex

Quasi-specular albedo of cold neutrons from powder of nanoparticles

classification nucl-ex
keywords reflectionalbedoneutronsquasi-specularangleangularcoldequal
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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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