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Advances in High Energy Physics
Volume 2015, Article ID 808212, 4 pages
http://dx.doi.org/10.1155/2015/808212
Research Article

Neutron Scattering on Impurity Nanoclusters in Gel Samples

1Physics Department, Lancaster University, Lancaster LA1 4YB, UK
2Laboratory of Quantum Crystals, Institute of Solid State Physics RAS, Chernogolovka, Moscow District 142432, Russia
3Institut Max von Laue-Paul Langevin, 71 Avenue des Martyrs, 38042 Grenoble, France

Received 28 July 2014; Accepted 22 September 2014

Academic Editor: Guillaume Pignol

Copyright © 2015 V. B. Efimov et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The publication of this article was funded by SCOAP3.

Abstract

Results of recent SANS experiments with impurity-helium gel (IHG) samples in He-II are presented. We estimate the mean size of the impurity nanoparticles that form the frame of the IHG samples and discuss the possibility to use IHG samples for the production of ultracold neutrons (UCNs) in He-II cooled to the temperature of a few mK, as well as the reflection of UCNs at any temperature. Our results indicate that the most promising materials for these purposes might be the heavy water gel samples with the mean sizes of D2O clusters of d~8 nm and the heavy alcohol gel samples with the mean sizes of clusters of d~15 nm.