Neutron Laue diffraction in a weakly deformed crystal at the Bragg angles close to pi/2

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V.V. Fedorov, I.A. Kuznetsov, E.G. Lapin, S.Yu. Semenikhin, V.V. Voronin

An essential magnification of an external force acting on a diffracting neutron for the Bragg angles theta_B 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 ~(10^2-10^3) for Bragg angles sufficiently close to 90°.

Письма в ЖЭТФ, 2007, 85, вып. 1, 90-93. (JETP Letters, 2007, Vol. 85, No. 1, pp. 82–85)

• http://www.jetpletters.ras.ru/ps/1081/article_16362.shtml
• http://link.springer.com/article/10.1134/S0021364007010171