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Report No.

Recent developments of RITS code for Bragg edge imaging

Sato, Hirotaka; Shinohara, Takenao  ; Kiyanagi, Ryoji ; Aizawa, Kazuya ; Oi, Motoki ; Harada, Masahide  ; Oikawa, Kenichi  ; Maekawa, Fujio ; Iwase, Kenji*; Kamiyama, Takashi*; Kiyanagi, Yoshiaki*

Bragg edge imaging at a pulsed neutron source is a new tool to study engineering materials, which can simultaneously give crystalline structural information in a bulk specimen over wide area with good spatial resolution. In order to quantitatively deduce such information from the Bragg edge transmission spectrum at each pixel of a two-dimensional position sensitive detector, it is indispensable to analyze the shape of each Bragg edge in detail. Therefore, a comprehensive spectral analysis code "RITS" has been developed, and we have successfully demonstrated the quantitative imaging of not only crystal lattice strain but also crystallographic texture (preferred orientation) and crystallite block size. Furthermore, we are improving the code since it has not dealt with all crystal structures of 230 space groups, and not applicable to materials composed of multi crystalline phases. In the presentation, we will report the recent developments of the advanced Bragg edge imaging techniques.



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