New result in the production and decay of an isotope, 278113, of the 113th element

Kosuke Morita, Kouji Morimoto, Daiya Kaji, Hiromitsu Haba, Kazutaka Ozeki, Yuki Kudou, Takayuki Sumita, Yasuo Wakabayashi, Akira Yoneda, Kengo Tanaka, Sayaka Yamaki, Ryutaro Sakai, Takahiro Akiyama, Shin Ichi Goto, Hiroo Hasebe, Minghui Huang, Tianheng Huang, Eiji Ideguchi, Yoshitaka Kasamatsu, Kenji KatoriYoshiki Kariya, Hidetoshi Kikunaga, Hiroyuki Koura, Hisaaki Kudo, Akihiro Mashiko, Keita Mayama, Shin Ichi Mitsuoka, Toru Moriya, Masashi Murakami, Hirohumi Murayama, Saori Namai, Akira Ozawa, Nozomi Sato, Keisuke Sueki, Mirei Takeyama, Fuyuki Tokanai, Takayuki Yamaguchi, Atsushi Yoshida

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Abstract

An isotope of the 113th element, i.e., 278113, was produced in a nuclear reaction with a 70Zn beam on a 209Bi target. We observed six consecutive δ-decays following the implantation of a heavy particle in nearly the same position in the semiconductor detector under an extremely low background condition. The fifth and sixth decays are fully consistent with the sequential decays of 262Db and 258Lr in both decay energies and decay times. This indicates that the present decay chain consisted of 278113, 274Rg (Z = 111), 270Mt (Z = 109), 266Bh (Z = 107), 262Db (Z = 105), and 258Lr (Z = 103) with firm connections. This result, together with previously reported results from 2004 and 2007, conclusively leads to the unambiguous production and identification of the isotope 278113 of the 113th element.

Original languageEnglish
Article number103201
Journaljournal of the physical society of japan
Volume81
Issue number10
DOIs
Publication statusPublished - Oct 1 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    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. I., Hasebe, H., Huang, M., Huang, T., Ideguchi, E., Kasamatsu, Y., ... Yoshida, A. (2012). New result in the production and decay of an isotope, 278113, of the 113th element. journal of the physical society of japan, 81(10), [103201]. https://doi.org/10.1143/JPSJ.81.103201