New result in the production and decay of an isotope,
113 of the 113th element
Morita, Kosuke*; Morimoto, Koji*; Kaji, Daiya*; Haba, Hiromitsu*; Ozeki, Kazutaka*; Kudo, Yuki*; Sumita, Takayuki*; Wakabayashi, Yasuo*; Yoneda, Akira*; Tanaka, Kengo*; Yamaki, Sayaka*; Sakai, Ryutaro*; Akiyama, Takahiro*; Goto, Shinichi*; Hasebe, Hiroo*; Huang, M.*; Huang, T.*; Ideguchi, Eiji*; Kasamatsu, Yoshitaka*; Katori, Kenji*; Kariya, Yoshiki*; Kikunaga, Hidetoshi*; Koura, Hiroyuki
; Kudo, Hisaaki*; Mashiko, Akihiro*; Mayama, Keita*; Mitsuoka, Shinichi; Moriya, Toru*; Murakami, Masashi*
; Murayama, Hirofumi*; Namai, Saori*; Ozawa, Akira*; Sato, Nozomi; Sueki, Keisuke*; Takeyama, Mirei*; Tokanai, Fuyuki*; Yamaguchi, Takayuki*; Yoshida, Atsushi*
An isotope of the 113th element,
113, was produced in a nuclear reaction with a
Zn beam on a
Bi target. We observed six consecutive
decays following the implantation of a heavy particle in nearly the same position in the semiconductor detector, in extremely low background condition. The fifth and sixth decays are fully consistent with the sequential decays of
Db and
Lr both in decay energies and decay times. This indicates that the present decay chain consisted of
113,
Rg (Z = 111),
Mt (Z = 109),
Bh (Z = 107),
Db (Z = 105), and
Lr (Z = 103) with firm connections. This result, together with previously reported results from 2004 and 2007, conclusively leads the unambiguous production and identification of the isotope
113, of the 113th element.