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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：60 Percentile：96.18(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.
Ogino, Haruyuki*; Kono, Takahiko; Yamasoto, Kotaro; Fujiwara, Keiko*; Suzuki, Chihiro*
Nihon Genshiryoku Gakkai-Shi ATOMO
, 52(8), p.458 - 461, 2010/08
no abstracts in English
Sano, Tadashi*; Wada, Seiichi*; Suzuki, Keiko*; Natsuhori, Masahiro*; Kakizaki, Takehiko; Ito, Takashi*; Nakazawa, Konomi*; Kobayashi, Yasuhiko; Ito, Nobuhiko*
JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 115, 2007/02
Motoya, Kiyoichiro*; Hioki, Keiko*; Suzuki, Junichi
Journal of the Physical Society of Japan, 70(Suppl.A), p.139 - 141, 2001/05
no abstracts in English
Moribayashi, Kengo; Zhidkov, A. J.*; Sasaki, Akira; Sudo, Keiko; Suzuki, Shingo*
Atomic Collision Research in Japan, No.27, p.1 - 3, 2001/00
no abstracts in English
Moribayashi, Kengo; Zhidkov, A. G.; Sasaki, Akira; Sudo, Keiko; Suzuki, Shingo*
Proceedings of 2nd International Conference on Inertial Fusion Sciences and Applications (IFSA 2001), p.1182 - 1185, 2001/00
no abstracts in English
Hamada, Nobuyuki*; Hara, Takamitsu*; Funayama, Tomoo; Sakashita, Tetsuya; Kataoka, Keiko*; Sora, Sakura; Suzuki, Michiyo; Fukamoto, Kana; Yokota, Yuichiro; Omura, Motoko*; et al.
no journal, ,
no abstracts in English
calcium imaging of motor circuit in freely moving animals using improved G-CaMPsAndo, Keiko*; Nagamura, Yuko*; Okura, Masamichi*; Fei, X.*; Suzuki, Michiyo; Hashimoto, Koichi*; Nakai, Junichi*
no journal, ,
Sato, Makoto; Ichimura, Seiji; Suyama, Kenya; Tonoike, Kotaro; Kamohara, Keiko*; Suzuki, Norihisa*
no journal, ,
no abstracts in English
Kono, Takahiko; Ogino, Haruyuki*; Hokama, Tomonori; Yamasoto, Kotaro; Fujiwara, Keiko*; Suzuki, Chihiro*
no journal, ,
We state opinion of Young Researcher's to students about implementation of new ICRP recommendation in domestic laws.
Sano, Tadashi*; Suzuki, Keiko*; Natsuhori, Masahiro*; Kakizaki, Takehiko; Ito, Nao*; Nakazawa, Konomi*; Ito, Nobuhiko*; Wada, Seiichi*; Kobayashi, Yasuhiko
no journal, ,
no abstracts in English
Hamada, Nobuyuki*; Hara, Takamitsu*; Funayama, Tomoo; Sakashita, Tetsuya; Kataoka, Keiko*; Sora, Sakura; Suzuki, Michiyo; Fukamoto, Kana; Yokota, Yuichiro; Omura, Motoko*; et al.
no journal, ,
no abstracts in English
Sora, Sakura; Hamada, Nobuyuki*; Hara, Takamitsu*; Funayama, Tomoo; Sakashita, Tetsuya; Kataoka, Keiko*; Suzuki, Michiyo; Fukamoto, Kana; Yokota, Yuichiro; Kobayashi, Yasuhiko
no journal, ,
no abstracts in English
Kobayashi, Yasuhiko; Funayama, Tomoo; Sakashita, Tetsuya; Furusawa, Yoshiya*; Shao, C.*; Hamada, Nobuyuki*; Wada, Seiichi*; Yokota, Yuichiro; Kakizaki, Takehiko*; Fukamoto, Kana; et al.
no journal, ,
-ray irradiation on the basal slowing response in 
Suzuki, Michiyo; Sakashita, Tetsuya; Funayama, Tomoo; Fukamoto, Kana; Hamada, Nobuyuki*; Yokota, Yuichiro; Kataoka, Keiko*; Sora, Sakura; Tsuji, Toshio*; Kobayashi, Yasuhiko
no journal, ,
no abstracts in English
Kato, Tomoko; Suzuki, Yuji*; Tagami, Keiko*; Ishikawa, Nao*; Uchida, Shigeo*; Inagaki, Manabu; Miyahara, Kaname
no journal, ,
To select and to presume the parameters adaptable to biosphere assessment of geological disposal at an actual environment, the procedure of updating a database using the domestic biosphere data was developed and was tried to a part of element-specific parameters. As a result, we were able to set the reliable biosphere parameters, by arranging important background information to secure the reliability of the parameter.
Sato, Makoto; Fukaya, Hiroyuki; Umeda, Miki; Suyama, Kenya; Tonoike, Kotaro; Kamohara, Keiko*; Suzuki, Norihisa*
no journal, ,
no abstracts in English
