Clustering of Diamond Nanoparticles, Fluorination and Efficiency of Slow Neutron Reflectors - Université Clermont Auvergne Accéder directement au contenu
Article Dans Une Revue Nanomaterials Année : 2021

Clustering of Diamond Nanoparticles, Fluorination and Efficiency of Slow Neutron Reflectors

Résumé

Neutrons can be an instrument or an object in many fields of research. Major efforts all over the world are devoted to improving the intensity of neutron sources and the efficiency of neutron delivery for experimental installations. In this context, neutron reflectors play a key role because they allow significant improvement of both economy and efficiency. For slow neutrons, Detonation NanoDiamond (DND) powders provide exceptionally good reflecting performance due to the combination of enhanced coherent scattering and low neutron absorption. The enhancement is at maximum when the nanoparticle diameter is close to the neutron wavelength. Therefore, the mean nanoparticle diameter and the diameter distribution are important. In addition, DNDs show clustering, which increases their effective diameters. Here, we report on how breaking agglomerates affects clustering of DNDs and the overall reflector performance. We characterize DNDs using small-angle neutron scattering, X-ray diffraction, scanning and transmission electron microscopy, neutron activation analysis, dynamical light scattering, infra-red light spectroscopy, and others. Based on the results of these tests, we discuss the calculated size distribution of DNDs, the absolute cross-section of neutron scattering, the neutron albedo, and the neutron intensity gain for neutron traps with DND walls.

Domaines

Chimie
Fichier principal
Vignette du fichier
Nanomat_11_1945.pdf (3.07 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03722593 , version 1 (13-07-2022)

Identifiants

Citer

Aleksander Aleksenskii, Markus Bleuel, Alexei Bosak, Alexandra Chumakova, Artur Dideikin, et al.. Clustering of Diamond Nanoparticles, Fluorination and Efficiency of Slow Neutron Reflectors. Nanomaterials, 2021, 11 (8), pp.1945-1-1945-18. ⟨10.3390/nano11081945⟩. ⟨hal-03722593⟩
18 Consultations
16 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More