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VOLUME 85 (2007) | ISSUE 1 | PAGE 90
Neutron Laue diffraction in a weakly deformed crystal at the Bragg angles close to π/2
PACS: 14.20.Dh, 61.12.Gz
Abstract
An essential magnification of an external force acting on a diffracting neutron for the Bragg angles θB close to the right one is observed. Any external action (caused by either crystal deformation or external force affected the neutron) results in a bend of so called "Kato trajectories" inside the crystal and, for the case of finite crystal, gives a considerable variation of the intensities of both diffracted neutron beams (direct and reflected). It is shown that the magnification factor is proportional to \tan^2(\theta_B) and can reach (102 - 103) for Bragg angles sufficiently close to 90°.