On the neutron diffraction in crystals in the field of a standing sound wave

✍ Scribed by K.K. Grigoryan; A.G. Hayrapetyan; R.G. Petrosyan

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 203 KB
• Volume: 268
• Category: Article
• ISSN: 0168-583X
• DOI: 10.1016/j.nimb.2010.04.005

✦ Synopsis

The diffraction of neutrons is considered in crystals under the influence of a standing sound wave. The scattering probability is calculated for the elastic neutron-crystal interaction, whereas the neutronstanding sound wave interaction can be either elastic and inelastic. The possibility of short-wave (high-energy) neutrons diffraction is illustrated. It is shown that the Debye-Waller factor can be changed and tuned. The analysis of conservation laws are adduced both for thermal and short-wave neutrons. The formation of a ''sublattice" is shown in the process of neutrons elastic diffraction with respect to standing sound wave. The analogous to the Kapitza-Dirac effect is considered for neutrons.

The problem is solved within the frame of non-stationary S-matrix theory, where the neutron-phonon interaction is described by the Fermi pseudopotential, which is considered as a perturbation.