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NpRovira Leveroni, G.; Katabuchi, Tatsuya*; Tosaka, Kenichi*; Matsuura, Shota*; Kodama, Yu*; Nakano, Hideto*; Iwamoto, Osamu; Kimura, Atsushi; Nakamura, Shoji; Iwamoto, Nobuyuki
Journal of Nuclear Science and Technology, 59(1), p.110 - 122, 2022/01
Times Cited Count：1 Percentile：25.87(Nuclear Science & Technology)Kitazato, Kohei*; Milliken, R. E.*; Iwata, Takahiro*; Abe, Masanao*; Otake, Makiko*; Matsuura, Shuji*; Takagi, Yasuhiko*; Nakamura, Tomoki*; Hiroi, Takahiro*; Matsuoka, Moe*; et al.
Nature Astronomy (Internet), 5(3), p.246 - 250, 2021/03
Times Cited Count：27 Percentile：97(Astronomy & Astrophysics)Here we report observations of Ryugu's subsurface material by the Near-Infrared Spectrometer (NIRS3) on the Hayabusa2 spacecraft. Reflectance spectra of excavated material exhibit a hydroxyl (OH) absorption feature that is slightly stronger and peak-shifted compared with that observed for the surface, indicating that space weathering and/or radiative heating have caused subtle spectral changes in the uppermost surface. However, the strength and shape of the OH feature still suggests that the subsurface material experienced heating above 300 
C, similar to the surface. In contrast, thermophysical modeling indicates that radiative heating does not increase the temperature above 200 C at the estimated excavation depth of 1 m, even if the semimajor axis is reduced to 0.344 au. This supports the hypothesis that primary thermal alteration occurred due to radiogenic and/or impact heating on Ryugu's parent body.
Katabuchi, Tatsuya*; Iwamoto, Osamu; Hori, Junichi*; Kimura, Atsushi; Iwamoto, Nobuyuki; Nakamura, Shoji; Shibahara, Yuji*; Terada, Kazushi*; Rovira, G.*; Matsuura, Shota*
EPJ Web of Conferences, 239, p.01044_1 - 01044_4, 2020/09
Times Cited Count：1 Percentile：77.47NpRovira, G.*; Katabuchi, Tatsuya*; Tosaka, Kenichi*; Matsuura, Shota*; Terada, Kazushi*; Iwamoto, Osamu; Kimura, Atsushi; Nakamura, Shoji; Iwamoto, Nobuyuki; Segawa, Mariko; et al.
Journal of Nuclear Science and Technology, 57(1), p.24 - 39, 2020/01
Times Cited Count：8 Percentile：80.25(Nuclear Science & Technology)Jo, Akinori*; Kato, Shota*; Matsuura, Hirotaka*; Nagata, Kazumi*; Katakai, Akio; Tamada, Masao
no journal, ,
no abstracts in English
scale on fuel tube cladding by the melt of control rod assembleNakajima, Shotaro*; Matsuura, Suguru*; Nanko, Makoto*; Kurata, Masaki; Pham, V. H.
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Pham, V. H.; Matsuura, Suguru*; Nakajima, Shotaro*; Nagae, Yuji; Kurata, Masaki
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scale formed on zircaloy in steam starvation conditionsNakajima, Shotaro*; Matsuura, Suguru*; Nanko, Makoto*; Kurata, Masaki; Pham, V. H.
no journal, ,
no abstracts in English
Katabuchi, Tatsuya*; Iwamoto, Osamu; Hori, Junichi*; Iwamoto, Nobuyuki; Kimura, Atsushi; Nakamura, Shoji; Shibahara, Yuji*; Terada, Kazushi*; Takamiya, Koichi*; Fukutani, Satoshi*; et al.
no journal, ,
Accurate neutron capture cross sections on long-lived MA at fast region are required for developments of nuclear transmutation system. A study to improve accuracy of the fast neutron capture cross sections has been started as a collaborative project among Tokyo Institute of Technology, Japan Atomic Energy Agency and Kyoto University since 2017. This talk reports about the background, the object and the total plan of the project as the first one of the series presentations.
NpRovira, G.*; Katabuchi, Tatsuya*; Tosaka, Kenichi*; Matsuura, Shota*; Iwamoto, Osamu; Kimura, Atsushi; Nakamura, Shoji; Iwamoto, Nobuyuki; Terada, Kazushi*
no journal, ,
