SHIGEKAWA Yudai

Affiliation

Institute of Pure and Applied Sciences

Official title

Assistant Professor

Research keywords


electron spectroscopy
half-life variation
uranium 235
RF carpet
gas cell
Ion trap
super heavy elements
radiochemistry
nuclear chemistry
thorium 229
more...

Research projects


超低エネルギー核異性体トリウム229mの濃縮手法の開発	2025-06 -- 2028-03	重河優大	日本学術振興会/科学研究費助成事業挑戦的研究(萌芽)
原子核時計：革新的プローブによる基礎物理の探究	2025-04 -- 2030-03	吉村浩司; 山口敦史; 笠松良崇; 重河優大	日本学術振興会/科学研究費助成事業基盤研究(S)
原子核時計が切り拓く時空計測フロンティア	2024-10 -- 2030-03	吉村浩司; 山口敦史; 笠松良崇; 重河優大	Japan Science and Technology Agency (JST)/Core Research for Evolutionary Science and Technology
革新的超重元素化学分析システムの構築と新元素の化学	2024-04 -- 2029-03	羽場宏光;加治大哉;重河優大	日本学術振興会/科学研究費助成事業基盤研究(A)
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	2023-04 -- 2027-03	重河優大; 山口敦史	日本学術振興会/科学研究費助成事業	18,590,000Yen
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	2023-04 -- 2027-03	重河優大;山口敦史	日本学術振興会/科学研究費助成事業基盤研究(B)	18,590,000Yen
原子核時計実現にむけたトリウム229イオンのレーザー冷却	2023-04 -- 2026-03	山口敦史;重河優大	日本学術振興会/科学研究費助成事業基盤研究(A)
光子対診断治療学の総括	2022-05 -- 2025-03	島添健次; 富田英生; 佐藤健; 重河優大	日本学術振興会/科学研究費助成事業学術変革領域研究(B)	4,290,000Yen
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	2022-05 -- 2025-03	重河優大; 杉山暁; 野村幸世	日本学術振興会/科学研究費助成事業学術変革領域研究(B)	28,080,000Yen
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	2021-04 -- 2025-03	吉村浩司; 北尾真司; 菊永英寿; 重河優大; 笠松良崇; 山口敦史	Japan Society for the Promotion of Science/Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)	42,250,000Yen
more...

Career history


2025-04 -- (current)	University of TsukubaDepartment of Chemistry, Institute of Pure and Applied SciencesAssistant Professor
2023-04 -- 2025-03	RIKENRIKEN Nishina Center for Accelerator-Based Science, Nuclear Chemistry GroupPostdoctoral Researcher
2022-04 -- 2023-03	RIKENNuclear Chemistry Research Team, RI Application Research Group, RIKEN Nishina Center for Accelerator-Based SciencePostdoctoral Researcher
2019-04 -- 2022-03	RIKENNuclear Chemistry Research Team, RI Application Research Group, RIKEN Nishina Center for Accelerator-Based ScienceSpecial Postdoctoral Researcher (SPDR)
2016-04 -- 2019-03	JSPSJSPS research fellow (DC1)
2018-10 -- 2018-10	JSPSJSPS research fellow (PD) withdrawal
2016-09 -- 2017-08	ウィーン工科大学Atominstitut研究生

Academic background


2016-04 -- 2019-03	Osaka University Graduate School of Science Department of Chemistry
2014-04 -- 2016-03	Osaka University Graduate School of Science Department of Chemistry
2010-04 -- 2014-03	Osaka University Undergraduate School of Science Department of Chemistry

Degree


2019-03	博士（理学）	大阪大学

Academic societies


-- (current)	THE JAPAN SOCIETY OF NUCLEAR AND RADIOCHEMICAL SCIENCES
-- (current)	THE PHYSICAL SOCIETY OF JAPAN
-- (current)	THE CHEMICAL SOCIETY OF JAPAN

Honors & Awards


2025-03	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	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 Ohbu Research Incentive Award	Estimation of radiative half-life of <sup>229m</sup>Th by half-life measurement of other nuclear excited states in <sup>229</sup>Th
2018-09	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	若手優秀発表賞	<sup>233</sup>Uのα線-電子コインシデンス測定による<sup>229</sup>Thの内部転換電子観測の試み
2014-09	若手優秀発表賞	U-235mの脱励起過程の研究に向けた反跳核捕集装置の開発

Articles

Effect of Ligand Alkyl Chain Length on Lanthanide Extraction Using Liposomes Incorporating Diglycolamic Acid
Uehara Takeru; YAMASAKI Shinya; Shimizu Sota; Takaku ...
Analytical Scieneces, 2026-02
Incomplete fusion reaction producing 234U, 233U, and 232U in the 232Th + 7Li reaction
Nagai Ayumu; Hosokawa Hiroyuki; Teranishi Kakeru; Mori...
Radiochim. Acta/13(11), 2025-8
Development of an RF-carpet gas cell coupled to the RIKEN gas-filled recoil ion separator for chemistry of superheavy elements
Shigekawa Y.; Yamaguchi A.; Sato N.; Takamine A.; Wad...
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment/pp.170421-170421, 2025-03
Utilities of ionic liquid extraction with astatine ions and its extraction mechanism
Yokoyama Akihiko; Kawasaki Kohei; Nagai Yuta; Tazuru ...
Radiochimica Acta, 2025-02-28
Trapping of triply charged thorium-229 for a nuclear clock
Yamaguchi A; Shigekawa Y; Haba H; Wada M; Katori H
Journal of Physics: Conference Series/2889(1)/pp.012041-012041, 2024-11-01
Controlling ²²⁹Th isomeric state population in a VUV transparent crystal
Hiraki Takahiro; Okai Koichi; Bartokos Michael; Beeks ...
Nature Communications/15(1), 2024-07-16
Laser spectroscopy of triply charged ²²⁹Th isomer for a nuclear clock
Yamaguchi Atsushi; Shigekawa Yudai; Haba Hiromitsu; Ki...
Nature, 2024-04-17
pH dependence of perturbed angular correlation in DOTA chelated ¹¹¹In measured with ring-shape gamma-ray detectors
Shimazoe Kenji; Donghwan Kim; Mineo Tomoko; Sato Take...
Interactions/245(1)/p.22, 2024-02-14
Experimental apparatus for detection of radiative decay of ²²⁹Th isomer from Th-doped CaF₂
Hiraki Takahiro; Beeks Kjeld; Bartokos Michael; Fujimo...
Hyperfine Interactions/245(1), 2024-01-30
Production and chemical separation of ²²⁹Pa toward observation of γ rays of ^229mTh
Shigekawa Yudai; Yin Xiaojie; Nambu Akihiro; Wang Yan...
Journal of Radioanalytical and Nuclear Chemistry/333(3)/pp.1479-1486, 2023-08-01
Vacuum Ultraviolet Search from Thorium-229 Isomer in Crystal Toward Solid-State Nuclear Clock
Takatori S.; Fukunaga Y.; Guan M.; Hiraki T.; Masuda ...
2023 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS), 2023-05-15
Simultaneous multi-nuclide imaging via reconstruction-free double-photon emission coincidence imaging method with parallel hole collimator and slat collimator
Yan Linlin; Uenomachi Mizuki; Ueki Taisei; Kim Donghw...
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment/pp.168305-168305, 2023-04
Tumor Targeting of ²¹¹At-Labeled Antibody under Sodium Ascorbate Protection against Radiolysis
Takashima Hiroki; Ohnuki Kazunobu; Manabe Shino; Koga ...
Molecular Pharmaceutics/20(2)/pp.1156-1167, 2022-12-27
Probing Optimal Reaction Energy for Synthesis of Element 119 from ⁵¹V+²⁴⁸Cm Reaction with Quasielastic Barrier Distribution Measurement
Tanaka Masaomi; Brionnet Pierre; Du Miting; Ezold Jul...
Journal of the Physical Society of Japan/91(8), 2022-08-15
Coprecipitation with samarium hydroxide using multitracer produced through neutron-induced fission of 235U toward chemical study of heavy elements
Kasamatsu Yoshitaka; Nagase Masahiro; Ninomiya Hidemi; ...
Applied Radiation and Isotopes/179/pp.110006-110006, 2022-01
Anion-exchange Experiment of Zr, Hf, and Th in HNO3 and Quantum Chemical Study on the Nitrate Complexes toward Chemical Research on Element 104, Rf
Watanabe Eisuke; Kasamatsu Yoshitaka; Yokokita Takuya; ...
Solvent Extraction and Ion Exchange/pp.1-16, 2021-12-31
Estimation of radiative half-life of ^229mTh by half-life measurement of other nuclear excited states in ²²⁹Th
Shigekawa Y.; Yamaguchi A.; Suzuki K.; Haba H.; Hirak...
Physical Review C/104(2), 2021-08-03
Co-precipitation behaviour of single atoms of rutherfordium in basic solutions
Kasamatsu Yoshitaka; Toyomura Keigo; Haba Hiromitsu; Y...
Nature Chemistry/13(3)/pp.226-230, 2021-03
Absolute X-ray energy measurement using a high-accuracy angle encoder
Masuda Takahiko; Watanabe Tsukasa; Beeks Kjeld; Fujimo...
Journal of Synchrotron Radiation/28(1)/pp.111-119, 2021-01-01
Development of a retarding-field type magnetic bottle spectrometer for studying the internal-conversion process of ^235mU
Shigekawa Y.; Kasamatsu Y.; Yamakita Y.; Yasuda Y.; W...
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment/976/pp.164207-164207, 2020-10
Production of Bh266 in the Cm248(Na23,5n)Bh266 reaction and its decay properties
Haba H.; Fan F.; Kaji D.; Kasamatsu Y.; Kikunaga H.; ...
Physical Review C/102(2), 2020-08-27
Solvent Extraction of Zr and Hf from HCl by Aliquat 336 using a Flow-Type Extraction Apparatus Toward Online Chemical Studies of Element 104, Rutherfordium
Kasamatsu Yoshitaka; Kondo Narumi; Nakamura Kouhei; Ku...
SOLVENT EXTRACTION AND ION EXCHANGE, 2020-02
Observation of internal-conversion electrons emitted from ^229mTh produced by β decay of ²²⁹Ac
Shigekawa Y.; Kasamatsu Y.; Watanabe E.; Ninomiya H.; ...
Phys. Rev. C/100(4)/p.044304, 2019-10-04
X-ray pumping of the ²²⁹Th nuclear clock isomer
Masuda T.; Yoshimi A.; Fujieda A.; Fujimoto H.; Haba ...
Nature/573(7773)/pp.238-242, 2019-09-12
First Ionization Potentials of Fm, Md, No, and Lr: Verification of Filling-Up of 5f Electrons and Confirmation of the Actinide Series
Sato Tetsuya K.; Asai Masato; Borschevsky Anastasia; B...
Journal of the American Chemical Society/140(44)/pp.14609-14613, 2018-11-07
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Conference, etc.

環境水中99Tc質量分析のためのTcスパイク・トレーサー製造
佐々木暖人; 高見佳; 浅井雅人; 塚田和明; 高久雄一; 重河優大; 山﨑信哉; 坂...
日本地球化学会第72回年会(2025)/2025-09-17--2025-09-19
海水中の 237Np定量に向けた検討
小川颯士; 榊枝優真; 中島朗久; 永井歩夢; 細川浩由; 横山明彦; 羽場宏光; 南...
日本地球化学会第72回年会(2025)/2025-09-17--2025-09-19
Evaluation of the ability of Saccharomyces cerevisiae to reduce U(VI) by anaerobic respiration
Yamamoto Iori; YAMASAKI Shinya; Takaku Yuichi; Shigeka...
7th Asia-Pacific Symposium on Radiochemistry 2025 (APSORC 25)/2025-09-14--2025-09-19
Density of Radioactive Cesium-Rich Microparticles in Contaminated Soils
Takeuchi Koyo; YAMASAKI Shinya; Utsunomiya Satoshi; Ta...
7th Asia-Pacific Symposium on Radiochemistry 2025 (APSORC 25)/2025-09-14--2025-09-19
Fundamental study on the rapid analytical method for radioactive Cs-containing particles by PHITS
Matsumura Tsubasa; YAMASAKI Shinya; Sueki Keisuke; Shi...
7th Asia-Pacific Symposium on Radiochemistry 2025 (APSORC 25)/2025-09-14--2025-09-19
Synthesis of Neptunium Isotopes via the 238U+p Reaction for the Production of the Np Spike
Matsuzawa Nami; Ogawa Hayato; Yokoyama Akihiko; Haba ...
7th Asia-Pacific Symposium on Radiochemistry 2025 (APSORC 25)/2025-09-14--2025-09-19
Investigation of curium isotope measurements by mass spectrometry
Kasuga Yuya; Tsukada Kazuaki; Asai Masato; Takaku Yui...
7th Asia-Pacific Symposium on Radiochemistry 2025 (APSORC 25)/2025-09-14--2025-09-19
Comparative Uptake Behavior of Iodide and Iodate by Corals in Seawater
SHI ZHIYUAN; Takaku Yuichi; YAMASAKI Shinya; Shigekawa...
7th Asia-Pacific Symposium on Radiochemistry 2025 (APSORC 25)/2025-09-14--2025-09-19
1価のTh-229mの半減期の決定
重河優大; 山口敦史; 床井健運; 佐藤望; 笠松良崇; 和田道治; 羽場宏光
日本放射化学会第68回討論会(2024)/2024-09-23
Extraction and trapping of 229mTh ions for measuring nuclear-decay half-lives of various ionic species of 229mTh and observing electronic bridge process
重河優大; Atsushi Yamaguchi; Katsuyuki Tokoi; Nozomi Sat...
6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan (HAWAII2023)/2023-11-26--2023-12-1
Development of a cryogenic RF-carpet gas cell for the chemistry of superheavy elements
重河優大; A. Yamaguchi; N. Sato; A. Takamine; M. Wada; ...
7th International Conference on the Chemistry and Physics of the Transactinide Elements (TAN 23)/2023-11-12--2023-11-17
229Thイオンの引き出し・イオントラップ実験について
重河優大
第 12回停止・低速 RIビームを用いた核分光研究会/2023-09-04
超低エネルギー励起核U-235mとTh-229mの核壊変特性に関する研究
重河優大
電気学会2022年度第1回調査専門委員会/2022-09-28
U-235mの脱励起過程の研究に向けた反跳核捕集装置の開発
重河優大; 笠松良崇; 篠原厚
2014日本放射化学会年会・第58回放射化学討論会/2014-09
Development of the collection apparatus for recoil products for study of the deexcitation process of ^235mU
SHIGEKAWA YUDAI; KASAMATSU YOSHITAKA; SHINOHARA ATSUSHI
Fourth Joint Meeting of the Nuclear Physics Divisions of the American Physical Society and the Physical Society of Japan/2014-10
Development of a Collection Apparatus for Recoil Products for Study of the Deexcitation Process of ^235mU
Shigekawa Yudai; Kasamatsu Yoshitaka; Shinohara Atsushi
The 1st International Symposium on Interactive Materials Science Cadet Program/2014-11
^235mUの壊変過程の解明を目指した低エネルギー内部転換電子分光測定
重河優大; 笠松良崇; 安田勇輝; 篠原厚
2015日本放射化学会年会・第59回放射化学討論会/2015-09
Spectroscopy of Low-energy Conversion Electrons to investigate the Deexcitation Process of ^235mU
Shigekawa Yudai; Kasamatsu Yoshitaka; Yasuda Yuki; Shi...
The 2nd International Symposium on Interactive Materials Science Cadet Program/2015-11
Developments of the collection apparatus for recoil products and spectrometer of low-energy internal-conversion electrons to study the deexcitation process of ^235mU
Shigekawa Y.; Kasamatsu Y.; Shinohara A.
2015 International Chemical Congress of Pacific Basin Societies/2015-12
化学状態に依存した^235mUの半減期変化の測定
重河優大; 笠松良崇; 安田勇輝; 篠原厚
日本化学会第96春季年会 (2016)/2016-03
Measurement of the half-lives and the internal-conversion electron spectra of ^235mU depending on the chemical environments
Shigekawa Yudai; Kasamatsu Yoshitaka; Yasuda Yuki; Shi...
EXON 2016 (VIII International Symposium on Exotic Nuclei)/2016-09
Measurement of half-life and IC-electron-spectrum variation of ^235mU for various chemical environments
Shigekawa Y.; Kasamatsu Y.; Yasuda Y.; Kaneko M.; Shi...
ACTINIDES 2017/2017-07
複数の化学状態における^235mUの半減期測定および内部転換電子分光測定
重河優大; 笠松良崇; 安田勇揮; 金子政志; 篠原厚
2017日本放射化学会年会・第61回放射化学討論会/2017-09
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
重河優大; 笠松良崇; 安田勇輝; 篠原厚; Stellmer Simon; Kazakov ...
2017日本放射化学会年会・第61回放射化学討論会/2017-09
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
重河優大; 笠松良崇; 山北佳宏; 安田勇輝; 近藤成美; 渡邉瑛介; 篠原厚
2018日本放射化学会年会・第62回放射化学討論会/2018-09
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Teaching


2025-10 -- 2025-11	Advanced Chemistry Laboratory in Inorganic and Analytical Chemistry	University of Tsukuba.
2025-07 -- 2025-08	Advanced Chemistry Laboratory in Inorganic and Analytical Chemistry	University of Tsukuba.
2025-10 -- 2026-02	Chemistry Laboratory II	University of Tsukuba.

(Last updated: 2025-07-04)