Diffraction of slow neutrons by holographic SiO₂ nanoparticle-polymer composite gratings

Autor(en)

Jürgen Klepp, Christian Pruner, Yasuo Tomita, Christian Plonka-Spehr, Peter Geltenbort, S. Ivanov, Giuliana Manzin, Kenneth H. Andersen, Joachim Kohlbrecher, Mostafa A. Ellabban, Martin Fally

Abstrakt

Diffraction experiments with holographic gratings recorded in SiO$_2$ nanoparticle-polymer composites have been carried out with slow neutrons. The influence of parameters such as nanoparticle concentration, grating thickness and grating spacing on the neutron-optical properties of such materials has been tested. Decay of the grating structure along the sample depth due to disturbance of the recording process becomes an issue at grating thicknesses of about 100 microns and larger. This limits the achievable diffraction efficiency for neutrons. As a solution to this problem, the Pendell\"{o}sung interference effect in holographic gratings has been exploited to reach a diffraction efficiency of 83% for very cold neutrons.

Organisation(en)

Physik Funktioneller Materialien

Externe Organisation(en)

Paris-Lodron Universität Salzburg, The University of Electro-Communications, Johannes Gutenberg-Universität Mainz, Institut Laue-Langevin (ILL), Paul Scherrer Institute, Taibah University

Journal

Physical Review A

Band

84

Anzahl der Seiten

7

ISSN

1050-2947

DOI

https://doi.org/10.1103/PhysRevA.84.013621

Publikationsdatum

2011

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/21eaf7da-9f87-4f24-b195-f460e0401262