RIKEN Nishina Center for Accelerator-Based Science Superheavy Element Device Development Team
Team Leader: Kouji Morimoto (D.Sc.)
Research Summary

A gas-filled recoil ion separator has been used as a main experimental device for the study of superheavy elements. This team is in charge of maintain, improve, develop and operate the separators and related devices. There are two gas-filled recoil ion separators installed at RILAC experimental hall. One is GARIS that is designed for symmetric reaction such as cold-fusion reaction, and the other is newly developed GARIS-II that is designed for an asymmetric reaction such as hot-fusion reaction. New elements278Nh were produced by70Zn +209Bi reaction using GARIS. Further the new element search Z > 118 are preparing by using GARIS-II.
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 the113th 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).
Related Links
Lab Members
Principal investigator
- Kouji Morimoto
- Team Leader
Core members
- Daiya Kaji
- Technical Scientist
- Sota Kimura
- Postdoctoral Researcher
- Pierre Brionnet
- Postdoctoral Researcher
- Satoshi Ishizawa
- Junior Research Associate
- Toshitaka Niwase
- Junior Research Associate
Contact Information
Nishina RIBF Bldg.,
2-1 Hirosawa,
Wako, Saitama
351-0198, Japan
Email: morimoto [at] riken.jp