Neutron sub-micrometre tomography from scattering data

Heacock B.; Sarenac D.; Cory D.G.Huber M.G.MacLean J.P.W.Miao H.Wen H.Pushin D.A.

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Neutron sub-micrometre tomography from scattering data

机译：Neutron sub-micrometre tomography from scattering data

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摘要

Neutrons are valuable probes for various material samples across many areas of research. Neutron imaging typically has a spatial resolution of larger than 20 µm, whereas neutron scattering is sensitive to smaller features but does not provide a real-space image of the sample. A computed-tomography technique is demonstrated that uses neutron-scattering data to generate an image of a periodic sample with a spatial resolution of ∼300 nm. The achieved resolution is over an order of magnitude smaller than the resolution of other forms of neutron tomography. This method consists of measuring neutron diffraction using a double-crystal diffractometer as a function of sample rotation and then using a phase-retrieval algorithm followed by tomographic reconstruction to generate a map of the sample's scattering-length density. Topological features found in the reconstructions are confirmed with scanning electron micrographs. This technique should be applicable to any sample that generates clear neutron-diffraction patterns, including nanofabricated samples, biological membranes and magnetic materials, such as skyrmion lattices.

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《iucrj》 |2020年第5期|893-900|共8页
作者
Heacock B.; Sarenac D.; Cory D.G.Huber M.G.MacLean J.P.W.Miao H.Wen H.Pushin D.A.;
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作者单位

Department of Physics, North Carolina State University;

Triangle Universities Nuclear Laboratory;

Institute for Quantum Computing, University of WaterlooDepartment of Physics, University of WaterlooDepartment of Chemistry, University of WaterlooPerimeter Institute for Theoretical PhysicsCanadian Institute for Advanced ResearchNational Institute of Standards and TechnologyBiophysics and Biochemistry Center, National Heart, Lung and Blood Institute, National Institutes of Health;

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原文格式 PDF
正文语种英语
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COMPUTED TOMOGRAPHY; NANOSCIENCE; NANOSTRUCTURES; NEUTRON SCATTERING; NEUTRON DIFFRACTION; PHASE RETRIEVAL;

Neutron sub-micrometre tomography from scattering data

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