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Nuclear Instruments and Methods in Physics Research Research: Accelerators, Spectrometers, Detectors and Associated Equipment 595 (2008) 631-636
The reflection of very cold neutrons from diamond powder nanoparticles
V. V. Nesvizhevsky1, E. V. Lychagin, A. Yu. Muzychka, A. V. Strelkov, G. Pignol2, K.V. Protasov2

We study possibility of efficient reflection of very cold neutrons (VCN) from powders of nanoparticles. In particular, we measured the scattering of VCN at a powder of diamond nanoparticles as a function of powder sample thickness, neutron velocity and scattering angle. We observed extremely intense scattering of VCN even off thin powder samples. This agrees qualitatively with the model of independent nanoparticles at rest. We show that this intense scattering would allow us to use nanoparticle powders very efficiently as the very first reflectors for neutrons with energies within a complete VCN range up to $10^{-4}$ eV.
1 :  ILL - Institut Laue-Langevin
2 :  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
Physique/Physique Nucléaire Expérimentale
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