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- Title
Dispersion of the refractive index of a neutron in a crystal.
- Authors
Voronin, V.; Berdnikov, Ya.; Berdnikov, A.; Braginetz, Yu.; Vezhlev, E.; Kuznetsov, I.; Lasitsa, M.; Semenikhin, S.; Fedorov, V.
- Abstract
The dispersion (resonance) behavior of the refractive index of a neutron moving in a crystal with energies close to Bragg values has been studied. It has been shown that a small change in the energy of the neutron by about the Bragg width in this case (Δ E/ E ∼ 10) results in a significant (several tens of percent) change in the potential of the interaction of the neutron with the crystal. A new phenomenon-the acceleration of the neutron passing through a perfect crystal moving at a variable velocity near a Bragg resonance-has been observed. The effect appears because the parameter of deviation from the Bragg condition and, therefore, the neutron-crystal interaction potential change during the time of flight of the neuron through the accelerated crystal. As a result, the kinetic energy of the neutron leaving the crystal changes.
- Subjects
NEUTRONS; REFRACTIVE index; OPTICAL dispersion; BRAGG gratings; RESONANCE
- Publication
JETP Letters, 2014, Vol 100, Issue 8, p497
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364014200132