Centers & Labs

RIKEN Nishina Center for Accelerator-Based Science

Research Group for Superheavy Element

Group Director: Kosuke Morita (D.Sci.)

The elements with their atomic number Z>103 are called as trans-actinide or superheavy elements. The chemical properties of those elements have not yet been studied in detail. Those elements are not exist in nature therefore, they must be produced by artificially for the scientific study of those elements. In our laboratory, we have been studying the physical and chemical properties of the superheavy elements utilizing the accelerators in RIKEN and various methods of efficient production of the superheavy elements.

Main Research Field

Mathematical and physical sciences

Related Research Fields

Interdisciplinary science and engineering / Chemistry

Keywords

  • Superheavy Element research
  • Nuclear Experiment
  • Accelerator
  • Nuclear Chemistry
  • Detector development

Selected Publications

  1. Kaji, D., Morimoto, K., Haba, H., Wakabayashi, Y., Takeyama, M., Yamaki, S., Komori, Y., Yanou, S., Goto, S., and Morita, K.:
    "Decay Measurement of 283Cn Produced in the 238U(48Ca,3n) Reaction Using GARIS-II"
    Journal of Physical Society of Japan, 86, 085001 (2017)
  2. Kaji, D., Morita, K., Morimoto, K., Haba, H., Asai, M., Fujita, K., Gan, Z., Geissel, H., Hasebe, H., Hofmann, S., Huang, M., Komori, Y., Ma, L., Maurer, J., Murakami, M., Takeyama, M., Tokanai, F., Tanaka, T., Wakabayashi. Y., Yamaguchi, T., Yamaki, S., and Yoshida, A.,:
    "Study of the Reaction 48Ca + 248Cm → 296Lv* at RIKEN-GARIS"
    Journal of Physical Society of Japan, 86, 034201(2017)
  3. Kaji, D., and Morimoto, K.,:
    "Double-layered target and identification method of individual target correlated with evaporation residues"
    Nuclear Inst. And Methods in Physics Research, A, Vol. 792, p. 11-14 (2015)
  4. Morita, K., Morimoto, K., Kaji, D., Haba, H., Ozeki, K., Kudou, Y., Sumita, T., Wakabayashi, Y., Yoneda, A., Tanaka, K., Yamaki, S., Sakai, R., Akiyama, T., Goto, S., Hasebe, H., Huang, M., Huang, T., Ideguchi, E., Kasamatsu, Y., Katori, K., Kariya, Y., Kikunaga, H., Koura, H., Kudo, H., Mashiko, A., Mayama, K., Mitsuoka, S., Moriya, T., Murakami, M., Murayama, H., Namai, S., Ozawa, A., Sato, N., Sueki, K., Takeyama, M., Tokanai, F., Yamaguchi, T., and Yoshida, A.,:
    "New result in the Production and Decay of an Isotope, 278113, of the 113th Element"
    Journal of Physical Society of Japan, 81, 103201(2012)
  5. Kaji, D., Morimoto, K., Sato, N. Ichikawa, T., Ideguchi, E., Ozeki, K., Haba, H., Koura, H., Kudou, Y., Ozawa, A., Sumita, T., Yamaguchi, T., Yoneda, A., Yoshida, A.,and Morita, K.:
    "Production and Decay Properties of 263Hs."
    Journal of Physical Society of Japan, 78, 035003(2009).
  6. Kaji, D., Morimoto, K., Yoneda, A. Hasebe, H., Yoshida, A., Goto. S., Kudo, H.,and Morita, K.:
    "Target for the heaviest element production at RIKEN."
    Nucl. Instr. and Meth. A 590 (198) (2008).
  7. Morita, K., Morimoto, K., Kaji, D., Akiyama, T., Goto, S., Haba, H., Ideguchi, E., Katori, K., Koura, H., Kikunaga, H., Kudo, H., Ohnishi, T., Ozawa, A., Sato, N., Suda, T., Sueki, K., Tokanai, F., Yamaguchi, T., Yoneda, A., and Yoshida, A.:
    "Observation of Second Decay Chain from 278113."
    Journal of Physical Society of Japan, 76, 045001(2007).
  8. Morita, K., Morimoto, K., Kaji, D., Akiyama, T., Goto, S., Haba, H., Ideguchi, E., Katori, K., Koura, H., Kudo, H., Ohnishi, T., Ozawa, A., Suda, T., Sueki, K., Tokanai, F., Yamaguchi, T., Yoneda, A., and Yoshida, A.:
    "Experiment on Synthesis of an Isotope 277112 by 208Pb + 70Zn Reaction."
    Journal of Physical Society of Japan, 76, 043201(2007).
  9. Haba, H., Kaji, D., Kikunaga, H., Akiyama, T., Sato, N., Morimoto, K., Yoneda, A., Morita, K., Takabe, T., and Shinohara, A.:
    "Development of Gas-jet Transport System Coupled to the RIKEN Gas-filled Recoil Ion Separator GARIS for Superheavy Element Chemistry."
    J. Nucl. Radiochem. Sci. 8, 55-58 (2007).
  10. Morita, K., Morimoto, K., Kaji, D., Akiyama, T., Goto, S., Haba, H., Ideguchi, E., Kanungo, R., Katori, K., Koura, H., Kudo, H., Ohnishi, T., Ozawa, A., Suda, T., Sueki, K., Xu, H., Yamaguchi, T., Yoneda, A., Yoshida, A., and Zhao, Y.-L.:
    "Experiment on the Synthesis of Element 113 in the Reaction 209Bi(70Zn,n)278113."
    Journal of Physical Society of Japan, 73, 2593-2596(2004).

Organization

Contact information

2-1 Hirosawa,
Wako, Saitama
351-0198, Japan

Email: morita [at] ribf.riken.jp

Related links

Recent research results

December 31, 2015: Press Release
It’s official! Element 113 was discovered at RIKEN