Clavier Batiste, Czamler Valentin, Dubois Marc, Henry Killian, Nesvizhevsky Valery, Petit Elodie
Clermont Auvergne INP, Université Clermont Auvergne, 63178 Aubière, France.
NPP/DS, Institut Max von Laue-Paul Langevin, 38042 Grenoble, France.
Materials (Basel). 2024 Dec 6;17(23):5972. doi: 10.3390/ma17235972.
The use of neutron reflectors is an effective method for improving the quality of neutron sources and neutron delivery systems. In this work, we further develop the method based on the Bragg scattering of neutrons in crystals with large interplanar distances. We compare samples of differently prepared fluorine intercalated graphites by measuring the total cross section for the interaction of neutrons with the samples, depending on the neutron wavelength. The Brag scattering cross section is expected to be the dominant part of the total cross section in all the cases. The results show that all samples provide high reflection efficiency over the entire range of the so-called "neutron reflectivity gap" and beyond it, and that they also allow for the choosing of the optimal intercalation methods.
使用中子反射器是提高中子源和中子传输系统质量的有效方法。在这项工作中，我们基于中子在具有大晶面间距的晶体中的布拉格散射进一步发展了该方法。我们通过测量中子与样品相互作用的总截面来比较不同制备的氟插层石墨样品，该总截面取决于中子波长。在所有情况下，布拉格散射截面预计是总截面的主要部分。结果表明，所有样品在所谓的“中子反射率间隙”及其以外的整个范围内都具有高反射效率，并且它们还允许选择最佳的插层方法。
