Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Oba, Yojiro; Ito, Daisuke*; Saito, Yasushi*; Onodera, Yohei*; Parker, J. D.*; Shinohara, Takenao; Oikawa, Kenichi
Materials Research Proceedings, Vol.15, p.160 - 164, 2020/02
Lead Bismuth eutectic (LBE) is a promising candidate of the coolant for accelerator driven system (ADS) and fast breeder reactor. Neutron transmission imaging is a powerful technique to investigate the LBE in flow channel. However, previous studies have focused on the analysis of the neutron transmission spectra due to Bragg diffraction (Bragg edge transmission) from the solid phase of the LBE. If the neutron transmission spectra due to the diffraction from a liquid phase can be observed, it is useful to study the behavior of the molten LBE in the flow channel. Therefore, the energy-resolved neutron transmission imaging measurements of the molten LBE was carried out. The observed neutron transmission spectra can be explained by those calculated from the scattering profiles of the molten LBE. This indicates that the structure of the molten LBE can be characterized and mapped using the neutron transmission imaging.
Oba, Yojiro; Shinohara, Takenao; Sato, Hirotaka*; Onodera, Yohei*; Hiroi, Kosuke; Su, Y. H.; Sugiyama, Masaaki*
Journal of the Physical Society of Japan, 87(9), p.094004_1 - 094004_5, 2018/09
Times Cited Count：1 Percentile：11.98(Physics, Multidisciplinary)no abstracts in English
P
S
metastable crystalMori, Kazuhiro*; Enjuji, Keigo*; Murata, Shun*; Shibata, Kaoru; Kawakita, Yukinobu; Yonemura, Masao*; Onodera, Yohei*; Fukunaga, Toshiharu*
Physical Review Applied (Internet), 4(5), p.054008_1 - 054008_6, 2015/11
Times Cited Count：40 Percentile：82.07(Physics, Applied)no abstracts in English
Oba, Yojiro; Ito, Daisuke*; Saito, Yasushi*; Onodera, Yohei*; Parker, J.*; Shinohara, Takenao; Oikawa, Kenichi
no journal, ,
no abstracts in English
Oba, Yojiro; Ito, Daisuke*; Saito, Yasushi*; Onodera, Yohei*; Parker, J. D.*; Shinohara, Takenao; Oikawa, Kenichi
no journal, ,
With the progress of pulsed neutron techniques, neutron transmission spectroscopy became able to provide the structural information in samples via the neutron attenuation by neutron scattering. This technique is known as the Bragg edge transmission analysis for crystalline materials. The Bragg edge transmission analysis is widely applied to neutron imaging experiments. In contrast, little attention has been paid to the neutron diffraction contributions from liquid and amorphous materials in the neutron transmission spectra. In this study, we measured and analyzed the neutron transmission spectra of liquid lead-bismuth eutectic (LBE) to clarify the relation between the neutron transmission spectra and diffraction profiles of liquid and amorphous materials.
Oba, Yojiro; Ito, Daisuke*; Saito, Yasushi*; Onodera, Yohei*; Shinohara, Takenao; Parker, J. D.*; Oikawa, Kenichi; Ikeda, Kazutaka*
no journal, ,
Neutron transmission spectra include a neutron scattering contribution. This contribution allows to obtain structural information from the neutron transmission spectra. This is known as a useful means to characterize crystal structures and nanostructures. However, little attention has been paid to the neutron scattering contribution for liquid and glass structures. Therefore, we measured and analyzed neutron transmission spectra of liquid lead-bismuth eutectic in this study. The neutron transmission spectra show a wavy pattern. We clarified that this wavy feature is well explained by the neutron scattering profiles of the same sample.
