High-precision neutron spectrometry, using diffraction focusing. Test experiment

6th European Conference on Neutron Scattering

Kuznetsov, I.A.^1 ; Berdnikov, Ya.A.^2 ; Berdnikov, A.Ya.^2 ; Borisov, Yu.V.^1 ; Braginetz, Yu.P.^1,2 ; Fedorov, V.V.^1,2,3 ; Lasitsa, M.V.^1,2 ; Semenikhin, S.Yu.^1 ; Khorina, M.L.^2 ; Voronin, V.V.^1,2,3

Petersburg Nuclear Physics Institute NRC KI, Gatchina, Leningrad district, Russia^1

Peter the Great St.Petersburg Polytechnic University, Saint-Petersburg, Russia^2

Saint-Petersburg State University, Saint-Petersburg, Russia^3

关键词: Angular resolution;    Bragg reflection;    Double crystals;    Laue diffraction;    Neutron focusing;    Neutron spectrometry;    Perfect crystals;    Spin-echo small-angle neutron scattering;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/746/1/012049/pdf
DOI  :  10.1088/1742-6596/746/1/012049

来源: IOP

【 摘 要 】

The effect of double-crystal neutron focusing, using Laue diffraction in large perfect crystals was studied. The observed effect allows reach the angular resolution better than 0.03«, that is ∼ 10-2 of the Bragg reflection width. This fact makes it possible to create a new ultraprecise method for neutron spectrometry combining the spin-echo small angle neutron scattering with Laue diffraction.