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JOURNALS // Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki // Archive

Pis'ma v Zh. Èksper. Teoret. Fiz., 2012 Volume 96, Issue 1, Pages 3–7 (Mi jetpl3159)

This article is cited in 11 papers

FIELDS, PARTICLES, AND NUCLEI

Effect of anomalous absorption of neutrons undergoing Laue diffraction at Bragg angles close to $\pi/2$

E. O. Vezhlevab, V. V. Voronina, I. A. Kuznetsova, S. Yu. Semenikhina, V. V. Fedorovab

a B. P. Konstantinov Petersburg Nuclear Physics Institute, Russian Academy of Sciences
b Saint-Petersburg State Polytechnical University

Abstract: A direct experimental observation of the anomalous absorption of neutrons undergoing Laue diffraction in a highly perfect silicon single crystal of size about $200$ mm at Bragg angles close to $\pi/2$ is reported. It is shown that, in the case of diffraction at the $(220)$ plane, the neutron absorption length may be several meters, which is nearly one order of magnitude longer than the mean absorption length for neutrons of the same wavelength. This circumstance makes it possible to study effects accompanying Laue diffraction at Bragg angles of up to $88^\circ$ and a crystal size of about $200$ mm.

Received: 16.05.2012


 English version:
Journal of Experimental and Theoretical Physics Letters, 2012, 96:1, 1–5

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