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Effect of Particle Sizes on the Efficiency of Fluorinated Nanodiamond Neutron Reflectors

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dc.contributor.author Aleksenskii, Aleksander
dc.contributor.author Bleuel, Marcus
dc.contributor.author Bosak, Alexei
dc.contributor.author Chumakova, Alexandra
dc.contributor.author Dideikin, Artur
dc.contributor.author Dubois, Marc
dc.contributor.author Korobkina, Ekaterina
dc.contributor.author Lychagin, Egor
dc.contributor.author Muzychka, Alexei
dc.contributor.author Nekhaev, Grigory
dc.contributor.author Nesvizhevsky, Valery
dc.contributor.author Nezvanov, Alexander
dc.contributor.author Schweins, Ralf
dc.contributor.author Shvidchenko, Alexander
dc.contributor.author Strelkov, Alexander
dc.contributor.author Turlybekuly, Kylyshbek
dc.contributor.author Vul’, Alexander
dc.contributor.author Zhernenkov, Kirill
dc.date.accessioned 2024-09-13T10:26:23Z
dc.date.available 2024-09-13T10:26:23Z
dc.date.issued 2021
dc.identifier.citation Aleksenskii, A.; Bleuel, M.; Bosak, A.; Chumakova, A.; Dideikin, A.; Dubois, M.; Korobkina, E.; Lychagin, E.; Muzychka, A.; Nekhaev, G.; et al. Effect of Particle Sizes on the Efficiency of Fluorinated Nanodiamond Neutron Reflectors. Nanomaterials 2021, 11, 3067. https:// doi.org/10.3390/nano11113067 ru
dc.identifier.issn 2079-4991
dc.identifier.other doi.org/10.3390/nano11113067
dc.identifier.uri http://rep.enu.kz/handle/enu/16323
dc.description.abstract Over a decade ago, it was confirmed that detonation nanodiamond (DND) powders reflect very cold neutrons (VCNs) diffusively at any incidence angle and that they reflect cold neutrons quasi-specularly at small incidence angles. In the present publication, we report the results of a study on the effect of particle sizes on the overall efficiency of neutron reflectors made of DNDs. To perform this study, we separated, by centrifugation, the fraction of finer DND nanoparticles (which are referred to as S-DNDs here) from a broad initial size distribution and experimentally and theoretically compared the performance of such a neutron reflector with that from deagglomerated fluorinated DNDs (DF-DNDs). Typical commercially available DNDs with the size of ~4.3 nm are close to the optimum for VCNs with a typical velocity of ~50 m/s, while smaller and larger DNDs are more efficient for faster and slower VCN velocities, respectively. Simulations show that, for a realistic reflector geometry, the replacement of DF-DNDs (a reflector with the best achieved performance) by S-DNDs (with smaller size DNDs) increases the neutron albedo in the velocity range above ~60 m/s. This increase in the albedo results in an increase in the density of faster VCNs in such a reflector cavity of up to ~25% as well as an increase in the upper boundary of the velocities of efficient VCN reflection. ru
dc.language.iso en ru
dc.publisher Nanomaterials ru
dc.relation.ispartofseries Volume 11;Issue 11
dc.subject detonation nanodiamonds ru
dc.subject nanopowder ru
dc.subject reflectors of slow neutrons ru
dc.subject albedo ru
dc.subject size separation of nanodiamonds ru
dc.subject fluorination ru
dc.subject Monte Carlo ru
dc.title Effect of Particle Sizes on the Efficiency of Fluorinated Nanodiamond Neutron Reflectors ru
dc.type Article ru


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