2019 - 2023 Precision laser spectroscopy of thorium-229 nuclear isomers approached by active isomer pumping method
2018 - 2023 「原子核時計」実現にむけたトリウム229核異性体準位のエネルギー測定
2018 - 2021 「原子核時計」実現に向けた原子核量子計測技術の開発
2015 - 2018 Study on Thorium-229 low-lying isomeric state
2011 - 2013 Spectroscopy of the Nuclear Transition in Thorium-229 towards a Nuclear Frequency Standard
2006 - 2007 イッテルビウム原子気体の準安定状態における新奇ボース凝縮体の生成
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Papers (40):
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
Takahiro Hiraki, Kjeld Beeks, Michael Bartokos, Hiroyuki Fujimoto, Yuta Fukunaga, Hiromitsu Haba, Yoshitaka Kasamatsu, Shinji Kitao, Adrian Leitner, Takahiko Masuda, et al. Experimental apparatus for detection of radiative decay of 229Th isomer from Th-doped CaF2. Hyperfine Interactions. 2024. 245. 1
Y. Shigekawa, A. Yamaguchi, K. Tokoi, N. Sato, M. Wada, H. Haba. Extraction of 229Th3+, 2+ using RF carpet gas cell and observation of internal conversion process of 229mTh. RIKEN Accel. Prog. Rep. 2023. 56. S34-S35
S. Takatori, Y. Fukunaga, M. Guan, T. Hiraki, T. Masuda, R. Ogake, K. Okai, N. Sasao, K. Shimizu, S. Uetake, et al. Vacuum Tltraviolet Search from Thorium-229 Isomer in Crystal Toward Solid-State Nuclear Clock. 2023 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS). 2023
Y. Shigekawa, A. Yamaguchi, K. Suzuki, H. Haba, T. Hiraki, H. Kikunaga, T. Masuda, S. Nishimura, N. Sasao, A. Yoshimi, et al. Estimation of radiative half-life of 229mTh by half-life measurement of other nuclear excited states in 229Th. RIKEN Accel. Prog. Rep. 2022. 55. S13-S13