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

Team Leader: Hiromitsu Haba (D.Sci.)

Research Summary

Hiromitsu  Haba(D.Sci.)

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. 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).
  • 2. S. Takács, M. Aikawa, H. Haba, Y. Komori, F. Ditrói, Z. Szűcs, M. Saito, T. Murata, M. Sakaguchi, and N. Ukon:
    "Cross sections of alpha-particle induced reactions on natNi: Production of 67Cu"
    Nucl. Instr. and Meth. B 479, 125 (2020).
  • 3. 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).
  • 4. H. Haba:
    "A new period in superheavy-element hunting"
    Nat. Chem. 11, 10 (2019).
  • 5. 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).
  • 6. 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).
  • 7. 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).
  • 8. A. Yokoyama, Y. Kitayama, Y. Fukuda, H. Kikunaga, M. Murakami, Y. Komori, S. Yano, H. Haba, K. Tsukada, and A. Toyoshima:
    "Extraction behavior of rutherfordium as a cationic fluoride complex with a TTA chelate extractant from HF/HNO3 acidic solutions"
    Radiochimica Acta 107, 27 (2019).
  • 9. H. Haba:
    "Superheavy element chemistry pioneered by GARIS —Synthesis of a carbonyl complex of element 106, Seaborgium—"
    Radioisotopes, 67, 527(2018) (in Japanese).
  • 10. K. Fujiki, S. Yano, T. Ito, Y. Kumagai, Y. Murakami, O. Kamigaito, H. Haba, and K. Tanaka:
    "A one-pot three-component double-click method for synthesis of [67Cu]-labeled biomolecular radiotherapeutics"
    Sci. Rep. 7, 1912 (2017).

Recent Research Results

Lab Members

Principal investigator

Hiromitsu Haba
Team Leader

Core members

Hiroo Hasebe
Research & Development Scientist
Yukiko Komori
Contract Researcher
Takuya Yokokita
Postdoctoral Researcher
Yang Wang
Postdoctoral Researcher
Xiaojie Yin
Postdoctoral Researcher
Yudai Shigekawa
Special Postdoctoral Researcher
Akihiro Nambu
Technical Staff I
Nozomi Sato
Research Part-time Worker I
Michiko Kitagawa
Research Part-time Worker I
Minako Osanai
Research Part-time Worker II
Sachiko Usuda
Research Part-time Worker I
Kazuya Takahashi
Special Temporary Research Scientist

Contact Information

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