Details

Autor(en) / Beteiligte

• Dessieux, L. L.
• Stoica, A. D.
• Frost, M. J.
• dos Santos, A. M.

Titel

Synthesizing pseudo‐Kossel lines from neutron transmission data. I. An analytical approach for recovering single‐crystal orientation

Ist Teil von

• Journal of applied crystallography, 2023-04, Vol.56 (2), p.477-490

Ort / Verlag

5 Abbey Square, Chester, Cheshire CH1 2HU, England: International Union of Crystallography

Erscheinungsjahr

2023

Quelle

Wiley Online Library - AutoHoldings Journals

Beschreibungen/Notizen

• The energy‐dispersive neutron spectra transmitted through single crystals are characterized by sharp Bragg dips at specific wavelengths, where Bragg's law is being fulfilled for certain crystallographic planes. This phenomenon allows for developing methods for crystal‐orientation determination techniques similar to electron backscatter diffraction and X‐ray diffraction microscopy. This work presents a new procedure to recover the orientation matrix for single crystals using transmission spectra recorded during rotation of a crystal about an axis perpendicular to a polychromatic neutron beam. The proposed method consists of an initial transformation of the as‐collected wavelength–rotation maps to a wavevector K space, resulting in linear pseudo‐Kossel lines that are suitable for analysis and indexing using image‐processing procedures. Simulated neutron transmission spectra through a copper crystal with known orientations were used to set and prove the numerical approach. This technique may be expanded for cases where the neutron beam intersects multiple single‐crystal grains with different orientations. An approach to recover the orientation matrix of a single crystal by using neutron transmission spectra recorded during rotation of the crystal about an axis perpendicular to a polychromatic neutron beam is presented.