1. Crystal acceleration effect for cold neutrons in the vicinity of the Bragg resonance
- Author
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Yaroslav Berdnikov, Sergey Yu. Semenikhin, Yulia P. Braginetz, Valery V. Fedorov, Mikhail V. Lasitsa, Egor O. Vezhlev, Igor A. Kuznetsov, and Vladimir V. Voronin
- Subjects
Accelerated crystal ,Astrophysics::High Energy Astrophysical Phenomena ,Perfect crystal ,Nuclear Theory ,Neutron diffraction ,Physics::Optics ,Kinetic energy ,01 natural sciences ,Optics ,Condensed Matter::Superconductivity ,0103 physical sciences ,Diffraction topography ,Neutron ,Nuclear Experiment ,010306 general physics ,Physics ,010308 nuclear & particles physics ,business.industry ,Bragg's law ,Neutron temperature ,Neutron acceleration ,Atomic physics ,business ,Refractive index - Abstract
A new mechanism of neutron acceleration is studied experimentally in detail for cold neutrons passing through the accelerated perfect crystal with the energies close to the Bragg one. The effect arises due to the following reason. The crystal refraction index (neutron–crystal interaction potential) for neutron in the vicinity of the Bragg resonance sharply depends on the parameter of deviation from the exact Bragg condition, i.e. on the crystal–neutron relative velocity. Therefore the neutrons enter into the accelerated crystal with one neutron–crystal interaction potential and exit with the other. Neutron kinetic energy cannot vary inside the crystal due to its homogeneity. So, after passage through such a crystal, neutrons will be accelerated or decelerated because of the different energy change at the entrance and exit crystal boundaries.
- Published
- 2016
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