Experiment on the synthesis of element 113 in the reaction 209Bi(70Zn,n)278113

Kosuke Morita, Kouji Morimoto, Daiya Kaji, Takahiro Akiyama, Sin Ichi Goto, Hiromitsu Haba, Eiji Ideguchi, Rituparna Kanungo, Kenji Katori, Hiroyuki Koura, Hisaaki Kudo, Tetsuya Ohnishi, Akira Ozawa, Toshimi Suda, Keisuke Sueki, Hu Shan Xu, Takayuki Yamaguchi, Akira Yoneda, Atsushi Yoshida, Yu Liang Zhao

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489 Scopus citations


The convincing candidate event of the isotope of the 113th element, 278113, and its daughter nuclei, 274111 and 270Mt, were observed, for the first time, in the 209Bi + 70Zn reaction at a beam energy of 349.0 MeV with a total dose of 1.7 × 1019. Alpha decay energies and decay times of the candidates, 278113, 274111, and 270Mt, were (11.68 ± 0.04 MeV, 0.344 ms), (11.15 ± 0.07 MeV, 9.26ms), and (10.03 ± 0.07 MeV, 7.16 ms), respectively. The production cross section of the isotope was deduced to be 55-45 +150 fb(10-39 cm2).

Original languageEnglish (US)
Pages (from-to)2593-2596
Number of pages4
JournalJournal of the Physical Society of Japan
Issue number10
StatePublished - Oct 2004


  • Gas-filled recoil separator
  • New element 113
  • New isotopes 111 and Mt

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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