Confirmations of the synthesis of 113 produced by the Bi(Zn,n)113 reaction

Morimoto, Koji*; Morita, Kosuke*; Kaji, Daiya*; Haba, Hiromitsu*; Ozeki, Kazutaka*; Kudo, Yuki*; Sato, Nozomi; Sumita, Takayuki*; Yoneda, Akira*; Ichikawa, Takatoshi*; Fujimori, Yasuyuki*; Goto, Shinichi*; Huang, T.*; Ideguchi, Eiji*; Kasamatsu, Yoshitaka*; Katori, Kenji*; Komori, Yukiko*; Koura, Hiroyuki   ; Kudo, Hisaaki*; Murakami, Masashi*  ; Ozawa, Akira*; Sakai, Ryutaro*; Tokanai, Fuyuki*; Tsukada, Kazuaki  ; Yamaguchi, Takayuki*; Yoshida, Atsushi*

We performed the experiment to synthesize an isotope of the element 113 produced by a Bi(Zn,n)113 reaction using a gas-filled recoil ion separator (GARIS) at RIKEN. Two decay chains were observed, and assigned to those originating from an isotope 113. Both chains were connected into the previously known decays of Bh and Db via previously unknown decays of 113, Rg, and Mt. Although the Bh was known nuclide, a number of atoms reported so far was limited. In order to study more precise decay property of the Bh, we performed the direct production of Bh by the Cm(Na,5n)Bh reaction. In this experiment, the Bh was clearly identified from the correlation of the nuclide, Db. The obtained decay properties of Bh and Db are consistent with those observed in the 113 chain, which provided further confirmation of the discovery of 113.