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J-GLOBAL ID：201901010108024535 Update date: Mar. 19, 2025

YUDAI SHIGEKAWA

シゲカワユウダイ | YUDAI SHIGEKAWA

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Affiliation and department：
Job title： Postdoctoral Researcher

Research field (2)： Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics , Inorganic and coordination chemistry

Research keywords (12)： magnetic bottle , nuclear clock , radiochemistry , nuclear chemistry , super heavy elements , electron spectroscopy , internal conversion , half-life variation , thorium , uranium , 235U , 229Th

Research theme for competitive and other funds (9)：

2023 - 2027 トリウム229核異性体の内部転換抑制手法の開発によるガンマ線放出過程の解明
2023 - 2027 トリウム229核異性体の内部転換抑制手法の開発によるガンマ線放出過程の解明
2022 - 2025 光子対診断治療学の総括
2022 - 2025 もつれ光子対放出原子核と分子プローブの創成による生体内化学環境の医療診断
2021 - 2025 レーザーによるコヒーレントな原子核操作の実現ー原子核時計の創成と応用に向けて

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Papers (31)：

Y. Shigekawa, A. Yamaguchi, N. Sato, A. Takamine, M. Wada, H. Haba. Development of an RF-carpet gas cell coupled to the RIKEN gas-filled recoil ion separator for chemistry of superheavy elements. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2025. 170421-170421
Akihiko Yokoyama, Kohei Kawasaki, Yuta Nagai, Hisanori Tazuru, Yusuke Shimizu, Kohya Ganaha, Kohshin Washiyama, Ichiro Nishinaka, Yang Wang, Xiaojie Yin, et al. Utilities of ionic liquid extraction with astatine ions and its extraction mechanism. Radiochimica Acta. 2025
A Yamaguchi, Y Shigekawa, H Haba, M Wada, H Katori. Trapping of triply charged thorium-229 for a nuclear clock. Journal of Physics: Conference Series. 2024. 2889. 1. 012041-012041
Takahiro Hiraki, Koichi Okai, Michael Bartokos, Kjeld Beeks, Hiroyuki Fujimoto, Yuta Fukunaga, Hiromitsu Haba, Yoshitaka Kasamatsu, Shinji Kitao, Adrian Leitner, et al. Controlling ²²⁹Th isomeric state population in a VUV transparent crystal. Nature Communications. 2024. 15. 1
Atsushi Yamaguchi, Yudai Shigekawa, Hiromitsu Haba, Hidetoshi Kikunaga, Kenji Shirasaki, Michiharu Wada, Hidetoshi Katori. Laser spectroscopy of triply charged ²²⁹Th isomer for a nuclear clock. Nature. 2024

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MISC (14)：

Y. Itakura, R. Wang, M. Konno, K. Shibamoto, Y. Shigekawa, A. Nambu, H. Haba, K. Nagata, M. Kaneko, Y. Kasamatsu. Solvent extraction of Zr and Hf using soft ligands toward chemical study of Rf. RIKEN Accelerator Progress Report. 2024. 57. 148
高島大輝, 津村遼, 古賀宣勝, 安西高廣, YIN Xiaojie, 佐藤望, 重河優大, 南部明弘, 臼田祥子, 羽場宏光, et al. 放射線分解がα線放出核種アスタチン-211標識抗体の薬理薬効に及ぼす影響. 日本抗体学会学術大会プログラム・抄録集(Web). 2023. 2nd
高取沙悠理, BEEKS Kjeld, 藤本弘之, 福永優太, GUAN M., 羽場宏光, 平木貴宏, 笠松良崇, 北尾真司, 小無健司, et al. Characterization of Thorium-229 doped crystals for the solid-state nuclear clock using XAFS. 日本物理学会講演概要集(CD-ROM). 2023. 78. 2
福永優太, BEEKS Kjeld, 藤本弘之, 平木貴宏, GUAN M., 羽場宏光, 笠松良崇, 北尾真司, 小無健司, 増田孝彦, et al. Development of nuclear resonant scattering target for thorium-229 isomer level search. 日本物理学会講演概要集(CD-ROM). 2023. 78. 1
平木貴宏, BEEKS Kjeld, 藤本弘之, 福永優太, GUAN M., 羽場宏光, 笠松良崇, 北尾真司, 小無健司, 増田孝彦, et al. Search for vacuum-ultraviolet photon by deexcitation of the nuclear isomeric state of thorium-229. 日本物理学会講演概要集(CD-ROM). 2023. 78. 1

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Lectures and oral presentations (22)：

Progress toward observing γ-rays emitted from 229mTh by doping fluoride crystals with 229Pa
(5th International Conference on Application of RadiotraCers and Energetic Beams in Sciences (ARCEBS 2023) 2023)
Th-229mのγ線観測に向けたPa-229のフッ化物結晶への導入法及び光子測定装置の開発
(日本放射化学会第66回討論会(2022) 2022)
Th-229mの壊変特性の解明に向けた高周波イオン収集・質量分離装置の開発
(日本放射化学会第65回討論会(2021) 2021)
U-233のα-γ同時計数測定によるTh-229の原子核励起状態の半減期の決定
(2020)
核化学研究用高周波イオン収集システムの開発
(日本放射化学会第64回討論会(2020) 2020)

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Education (3)：

2016 - 2019 Osaka University Graduate School of Science Department of Chemistry
2014 - 2016 Osaka University Graduate School of Science Department of Chemistry
2010 - 2014 Osaka University Undergraduate School of Science Department of Chemistry

Professional career (1)：

Dr. Sci. (Osaka University)

Work history (6)：

2023/04 - 現在 RIKEN RIKEN Nishina Center for Accelerator-Based Science, Nuclear Chemistry Group Postdoctoral Researcher
2022/04 - 2023/03 RIKEN Nuclear Chemistry Research Team, RI Application Research Group, RIKEN Nishina Center for Accelerator-Based Science Postdoctoral Researcher
2019/04 - 2022/03 RIKEN Nuclear Chemistry Research Team, RI Application Research Group, RIKEN Nishina Center for Accelerator-Based Science Special Postdoctoral Researcher (SPDR)
2016/04 - 2019/03 JSPS JSPS research fellow (DC1)
2018/10 - 2018/10 JSPS JSPS research fellow (PD) withdrawal

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Awards (6)：

2025/03 - RIKEN 2024 RIKEN EIHO Award 原子核時計実現にむけた、イオントラップに捕獲されたトリウム229アイソマーの寿命測定
2023/09 - 日本放射化学会若手優秀発表賞(日本放射化学会第67回討論会(2023)) Th-229mの電子架橋遷移の観測に向けたTh-229mイオンの引き出しとトラップ
2023/03 - RIKEN RIKEN Ohbu Research Incentive Award Estimation of radiative half-life of 229mTh by half-life measurement of other nuclear excited states in 229Th
2018/09 - 日本放射化学会若手優秀発表賞阻止電場ー磁気ボトル型電子分光装置の開発およびU-235mの内部転換電子分光測定
2017/09 - 日本放射化学会若手優秀発表賞 233Uのα線-電子コインシデンス測定による229Thの内部転換電子観測の試み

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Association Membership(s) (3)：

THE CHEMICAL SOCIETY OF JAPAN , THE PHYSICAL SOCIETY OF JAPAN , THE JAPAN SOCIETY OF NUCLEAR AND RADIOCHEMICAL SCIENCES

※ Researcher’s information displayed in J-GLOBAL is based on the information registered in researchmap. For details, see here.

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