Neutron laue diffraction in a weakly deformed crystal at the Bragg angles close to π/2

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• 作者：V. V. Fedorov (1)
  I. A. Kuznetsov (1)
  E. G. Lapin (1)
  S. Yu. Semenikhin (1)
  V. V. Voronin (1) vvv@mail.pnpi.spb.ru
• 关键词：PACS numbers 14.20.Dh ; 61.12.Gz
• 刊名：JETP Letters
• 出版年：2007
• 出版时间：March 2007
• 年：2007
• 卷：85
• 期：1
• 页码：82-85
• 全文大小：160.1 KB
• 参考文献：1. Yu. S. Grushko, E. G. Lapin, O. I. Sumbaev, and A. V. Tyunis, Sov. Phys. JETP 47, 1185 (1978).
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  4. A. Zeilinger, C. G. Shull, M. A. Horne, and K. G. Finkelstein, Phys. Rev. Lett. 57, 3089 (1986).
  5. Yu. Alexandrov, in Proceedings of International Seminar on Interaction of Neutrons with Nuclei ISINN-XIII (Dubna, 2006), p. 166.
  6. S. A. Werner, Phys. Rev. B 21, 1774 (1980).
  7. V. V. Voronin, E. G. Lapin, S. Yu. Semenikhin, and V. V. Fedorov, JETP Lett. 71, 76 (2000).
  8. H. Rauch and D. Petrachek, in Neutron Diffraction, Ed. by H. Duchs (Springer, Berlin, 1978), pp. 303–351.
  9. N. Kato, J. Phys. Soc. Jpn. 19, 971 (1964).
  10. J. Baumann, R. Gahler, J. Kalus, and W. Mampe, Phys. Rev. D 37, 3107 (1988).
• 作者单位：1. Petersburg Nuclear Physics Institute Gatchina, St. Petersburg 188300 Russia
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Elementary Particles and Nuclei
  Atoms, Molecules, Clusters and Plasmas
  Solid State Physics and Spectroscopy
  Russian Library of Science
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1090-6487

文摘

An essential magnification of an external force acting on a diffracting neutron for the Bragg angles θ_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 the so called “Kato trajectories” inside the crystal and, for the case of a finite crystal, gives considerable variation of the intensities of both diffracted neutron beams (direct and reflected). It is shown that the magnification factor is proportional to tan2 (θ_b) and can reach (102?103) for Bragg angles surfficiently close to 90°.