Journal Article

IMPULSE-2023-00068

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Enhanced directional extraction of very cold neutrons using a diamond nanoparticle powder reflector

Chernyavsky, S. M. ; Dubois, M. ; Korobkina, E. ; Lychagin, E. V. ; Muzychka, A. Y. ; Nekhaev, G. V. ; Nesvizhevsky, V. V. (Corresponding author) ; Nezvanov, A. Y. ; Strelkov, A. V. ; Zhernenkov, K. N.MLZ*

2022
American Institute of Physics [Erscheinungsort nicht ermittelbar]

Please use a persistent id in citations: doi:10.1063/5.0124833

Abstract: For more than a decade, detonation nanodiamond (DND) powders have been actively studied as a material for efficient reflectors of very cold neutrons (VCNs) and cold neutrons. In this work, we experimentally demonstrate, for the first time, the possibility of enhanced directional extraction of a VCN beam using a reflector made of fluorinated DND powder. With respect to the theoretical flux calculated from an isotropic source at the bottom of the reflector cavity, the gain in the VCN flux density along the beam axis is ∼10 for the neutron velocities of ∼57 and ∼75 m/s. The use of such reflectors for enhanced directional extraction of VCN from neutron sources will make it possible to noticeably increase the neutron fluxes delivered to experiments and expand the scope of VCN applications.

Keyword(s): Instrument and Method Development (1st) ; Instrument and Method Development (2nd)

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Contributing Institute(s):

1. DNS (DNS)

Experiment(s):

1. Measurement at external facility

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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