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- W2045649851 abstract "It has been shown that the tunneling of neutrons can be used in classical neutron guides to extract high monochromatic and/or high polarized cold neutron beams. This can be achieved by implanting 58NiTi58Ni or 58NiCo58Ni Fabry-Pérot interferometers under total reflection condition in the neutron guide. According to the computed results, this tunneling phenomenon of neutrons manifests itself by the existence of sharp resonances in the 58Ni total reflection plateau. These resonances are localized at different spectral positions λr± for the monochromatization and λr+, λr− for the polarization. The narrow spectral bandwidth of the tunneling transmitted beam can reach values of the order of Δλ ≈ 0.01 Å and a strong transmissivity higher than 99%. The number and the spectral position of these resonances vary mainly with the characteristics of the spacer layer Ti or Co whereas their spectral bandwidths are imposed by the thickness of the reflecting 58Ni layers of the Fabry-Pérot interferometer. To obtain low resonance orders, the use of a nonmagnetic substrate with a negative nuclear scattering length density and a perfect collimated polychromatic neutron beam is required." @default.
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- W2045649851 date "1993-03-01" @default.
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- W2045649851 title "New optical transmission device to produce high monochromatic and high polarized neutron beams based on the tunneling frustrated total reflection in neutron guides" @default.
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- W2045649851 doi "https://doi.org/10.1016/0168-9002(93)90856-d" @default.
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