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Article Dans Une Revue Materials Année : 2023

Effect of Nanodiamond Sizes on the Efficiency of the Quasi-Specular Reflection of Cold Neutrons

Alexei Bosak
  • Fonction : Auteur
Marc Dubois
Ekaterina Korobkina
Egor Lychagin
Alexei Muzychka
  • Fonction : Auteur
Grigory Nekhaev
  • Fonction : Auteur
Valery Nesvizhevsky
Alexander Nezvanov
Thomas Saerbeck
  • Fonction : Auteur
Ralf Schweins
  • Fonction : Auteur
Alexander Strelkov
  • Fonction : Auteur
Kylyshbek Turlybekuly
  • Fonction : Auteur
Kirill Zhernenkov
  • Fonction : Auteur

Résumé

Nanomaterials can intensively scatter and/or reflect radiation. Such processes and materials are of theoretical and practical interest. Here, we study the quasi-specular reflections (QSRs) of cold neutrons (CNs) and the reflections of very cold neutrons (VCNs) from nanodiamond (ND) powders. The fluorination of ND increased its efficiency by removing/replacing hydrogen, which is otherwise the dominant cause of neutron loss due to incoherent scattering. The probability of the diffuse reflection of VCNs increased for certain neutron wavelengths by using appropriate ND sizes. Based on model concepts of the interaction of CNs with ND, and in reference to our previous work, we assume that the angular distribution of quasi-specularly reflected CNs is narrower, and that the probability of QSRs of longer wavelength neutrons increases if we increase the characteristic sizes of NDs compared to standard detonation nanodiamonds (DNDs). However, the probability of QSRs of CNs with wavelengths below the cutoff of ~4.12 Å decreases due to diffraction scattering on the ND crystal lattice. We experimentally compared the QSRs of CNs from ~4.3 nm and ~15.0 nm ND. Our qualitative conclusions and numerical estimates can help optimize the parameters of ND for specific practical applications based on the QSRs of CNs.

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Chimie

Dates et versions

hal-04569800 , version 1 (06-05-2024)

Identifiants

Citer

Alexei Bosak, Marc Dubois, Ekaterina Korobkina, Egor Lychagin, Alexei Muzychka, et al.. Effect of Nanodiamond Sizes on the Efficiency of the Quasi-Specular Reflection of Cold Neutrons. Materials, 2023, 16 (2), pp.703. ⟨10.3390/ma16020703⟩. ⟨hal-04569800⟩
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