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RIKEN Nishina Center for Accelerator-Based Science Nuclear Chemistry Research Team

Team Leader: Hiromitsu Haba (D.Sc.)

Research Summary

Hiromitsu  Haba

We develop production technologies of radioisotopes (RIs) at RIKEN RI Beam Factory (RIBF) for application studies in the fields of physics, chemistry, biology, medicine, pharmaceutical and environmental sciences. We mainly use the RIs for nuclear and radiochemical studies such as superheavy element chemistry. Purified RIs such as Zn-65 and Cd-109 are delivered to universities and institutes through Japan Radioisotope Association. We also develop new technologies of mass spectrometry for the trace-element analyses using accelerator technology and apply them to the research fields such as cosmochemistry, environmental science, archaeology and so on. We employ the conventional technology of isotopic measurements to examine sulfur and lead in geochemical and archeological samples. We also develop chemical materials for ECR ion sources of RIBF.

Main Research Fields

  • Chemistry

Related Research Fields

  • Environmental Science
  • Complex Systems
  • Social Sciences
  • Interdisciplinary Science & Engineering
  • Mathematical & Physical Sciences
  • Engineering


  • Nuclear chemistry
  • Radiochemistry
  • RI production and application
  • Superheavy element
  • Trace-element analysis

Selected Publications

  • 1. Y. Shigekawa, A. Yamaguchi, K. Suzuki, H. Haba, T. Hiraki, H. Kikunaga, T. Masuda, S. Nishimura, N. Sasao, A. Yoshimi, and K. Yoshimura:
    "Estimation of radiative half-life of 229mTh by half-life measurement of other nuclear excited states in 229Th"
    Phys. Rev. C 104, 024306 (2021).
  • 2. H. Takashima, Y. Koga, S. Manabe, K. Ohnuki, R. Tsumura, T. Anzai, N. Iwata, Y. Wang, T. Yokokita, Y. Komori, D. Mori, S. Usuda, H. Haba, H. Fujii, Y. Matsumura, and M. Yasunaga:
    "Radioimmunotherapy with an 211At-labeled anti-tissue factor antibody protected by sodium ascorbate"
    Cancer Sci. 112, 1975 (2021).
  • 3. Y. Kasamatsu, K. Toyomura, H. Haba, T. Yokokita, Y. Shigekawa, A. Kino, Y. Yasuda, Y. Komori, J. Kanaya, M. Huang, M. Murakami, H. Kikunaga, E. Watanabe, T. Yoshimura, K. Morita, T. Mitsugashira, K. Takamiya, T. Ohtsuki, and A. Shinohara:
    "Co-precipitation behaviour of single atoms of rutherfordium in basic solutions"
    Nature Chem. 13, 226 (2021).
  • 4. T. Tanaka, K. Morita, K. Morimoto, D. Kaji, H. Haba, R. A. Boll, N. T. Brewer, S. Van Cleve, D. J. Dean, S. Ishizawa, Y. Ito, Y. Komori, K. Nishio, T. Niwase, B. C. Rasco, J. B. Roberto, K. P. Rykaczewski, H. Sakai, D. W. Stracener, and K. Hagino:
    "Fusion Dynamics for Hot Fusion Reactions to Synthesize Superheavy Nuclei revealed in Quasielastic Barrier Distributions"
    Phys. Rev. Lett. 124, 052502 (2020).
  • 5. H. Haba, F. Fan, D. Kaji, Y. Kasamatsu, H. Kikunaga, Y. Komori, N. Kondo, H. Kudo, K. Morimoto, K. Morita, M. Murakami, K. Nishio, J. P. Omtvedt, K. Ooe, Z. Qin, D. Sato, N. Sato, T. K. Sato, Y. Shigekawa, A. Shinohara, M. Takeyama, T. Tanaka, A. Toyoshima, K. Tsukada, Y. Wakabayashi, Y. Wang, S. Wulff, S. Yamaki, S. Yano, Y. Yasuda, and T. Yokokita:
    "Production of 266Bh in the 248Cm(23Na,5n)266Bh reaction and its decay properties"
    Phys. Rev. C 102, 024625 (2020).
  • 6. A. Yamaguchi, H. Muramatsu, T. Hayashi, N. Yuasa, K. Nakamura, M. Takimoto, H. Haba, K. Konashi, M. Watanabe, H. Kikunaga, K. Maehata, N. Y. Yamasaki, and K. Mitsuda:
    "Energy of the 229Th nuclear clock isomer determined by absolute γ-ray energy difference"
    Phys. Rev. Lett. 123, 222501 (2019).
  • 7. H. Haba:
    "A new period in superheavy-element hunting"
    Nature Chem. 11, 10 (2019).
  • 8. T. Masuda, A. Yoshimi, A. Fujieda, H. Fujimoto, H. Haba, H. Hara, T. Hiraki, H. Kaino, Y. Kasamatsu, S. Kitao, K. Konashi, Y. Miyamoto, K. Okai, S. Okubo, N. Sasao, M. Seto, T. Schumm, Y. Shigekawa, K. Suzuki, S. Stellmer, K. Tamasaku, S. Uetake, M. Watanabe, T. Watanabe, Y. Yasuda, A. Yamaguchi, Y. Yoda, T. Yokokita, M. Yoshimura, and K. Yoshimura:
    "X-ray pumping of the 229Th nuclear clock isomer"
    Nature 573, 238 (2019).
  • 9. Y. Wang, S. Cao, J. Zhang, F. Fan, J. Yang, H. Haba, Y. Komori, T. Yokokita, K. Morimoto, D. Kaji, Y. J. Wittwer, R. Eichler, A. Türler, and Z. Qin:
    "The study of rhenium pentacarbonyl complexes using single-atom chemistry in gas phase"
    Phys. Chem. Chem. Phys. 21, 7147 (2019).
  • 10. K. Fujiki, Y. Kanayama, S. Yano, N. Sato, T. Yokokita, P. Ahmadi, Y. Watanabe, H. Haba, and K. Tanaka:
    "211At-labeled immunoconjugate via a one-pot three-component double click strategy: practical access to α-emission cancer radiotherapeutics"
    Chem. Sci. 10, 1936 (2019).

Recent Research Results

Lab Members

Principal investigator

Hiromitsu Haba
Team Leader

Core members

Hiroo Hasebe
Research & Development Scientist
Xiaojie Yin
Contract Researcher
Yudai Shigekawa
Postdoctoral Researcher
Akihiro Nambu
Technical Staff I
Motoki Sato
Junior Research Associate
Teruhito Nakashita
Junior Research Associate
Nozomi Sato
Research Part-time Worker I
Michiko Kitagawa
Research Part-time Worker I
Sachiko Usuda
Research Part-time Worker I
Minako Osanai
Research Part-time Worker II
Kazuya Takahashi
Special Temporary Research Scientist

Contact Information

Nishina Building,
2-1 Hirosawa,
Wako, Saitama
351-0198, Japan
Email: haba [at] riken.jp