Plastically deformed Si-crystal wafers for neutron-monochromator elements

Plastically deformed Si-crystal wafers were characterized by monochromatic neutron diffraction. During the cylindrically curved deformation, a resolution-limit Bragg peak changes into a box-type angular profile in accordance with the bulk curvature, associated with an enhancement in the angle-integrated intensity (I_θ${}_{}$). Stacking such wafers is efficient in amplifying I_θ${}_{}$ further. We propose an application to neutron-focusing monochromator (or analyzer) crystals in order to design a quite compact spectrometer.

Keywords

• Plastically deformed Si wafer; 
• Neutron monochromator; 
• Neutron reflectivity; 
• Mosaic crystal
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      • Source:Sciencedirect
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