Research Summary

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 Fields

• Mathematical & Physical Sciences

Related Research Fields

• Interdisciplinary Science & 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 of²⁸³Cn Produced in the²³⁸U(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 Reaction⁴⁸Ca +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 113^th 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 of²⁶³Hs."
  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 from²⁷⁸113."
  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 Isotope²⁷⁷112 by²⁰⁸Pb +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 Reaction²⁰⁹Bi(⁷⁰Zn,n)²⁷⁸113."
  Journal of Physical Society of Japan, 73, 2593-2596(2004).

Recent Research Results

• 

  Dec. 31, 2015
  It’s official! Element 113 was discovered at RIKEN

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