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

K.K. Grigoryan; A.G. Hayrapetyan; R.G. Petrosyan

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

机译：关于驻声波场中晶体的中子衍射

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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 neutron-standing 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.rnThe 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.

机译：在驻声波的影响下，晶体中考虑了中子的衍射。计算弹性中子-晶体相互作用的散射概率，而驻中子声波相互作用可以是弹性的也可以是非弹性的。说明了短波（高能）中子衍射的可能性。结果表明，可以更改和调整Debye-Waller因子。对热中子和短波中子都提出了守恒律的分析。在相对于驻声波的中子弹性衍射过程中，示出了“亚晶格”的形成。对于中子，考虑了类似于Kapitza-Dirac效应。在非平稳S矩阵理论的框架内解决了该问题，在该理论中，中子-声子相互作用由费米伪势描述，被认为是微扰。

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来源
《Nuclear instruments and methods in physics research》 |2010年第14期|P.2366-2370|共5页
作者
K.K. Grigoryan; A.G. Hayrapetyan; R.G. Petrosyan;
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作者单位

Yerevan State University, 1 Alex Manoogian Str., 0025 Yerevan, Armenia;

rnInstitute of Applied Problems of Physics, National Academy of Sciences of Republic of Armenia, 25 Hr. Nersisyan Str., 0014 Yerevan, Armenia;

rnYerevan State University, 1 Alex Manoogian Str., 0025 Yerevan, Armenia;

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正文语种 eng
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neutron scattering; neutron diffraction; debye-Waller factor; standing sound wave; crystal;

机译：中子散射中子衍射德拜-沃勒因子驻波水晶;

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2. On the Neutron Diffraction in Crystalsin the Field of a Sound Wave [J] . A. G. Hayrapetyan Journal of contemporary physics . 2009,第4期

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

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