Production and decay properties of Cn produced in the reaction of Pb+Zn

Sumita, Takayuki*; Morimoto, Koji*; Kaji, Daiya*; Ozeki, Kazutaka*; Katori, Kenji*; Sakai, Ryutaro*; Hasebe, Hiroo*; Haba, Hiromitsu*; Yoneda, Akira*; Yoshida, Atsushi*; Morita, Kosuke*; Sato, Nozomi; Wakabayashi, Yasuo*; Mitsuoka, Shinichi; Goto, Shinichi*; Murakami, Masashi*  ; Kariya, Yoshiki*; Tokanai, Fuyuki*; Moriya, Toru*; Mayama, Keita*; Takeyama, Mirei*; Ideguchi, Eiji*; Yamaguchi, Takayuki*; Chiba, Junsei*

The decay property of Cn (atomic number, ) produced in the Pb(Zn, ) reaction was studied. The experiment was performed using the gas-filled recoil ion separator (GARIS) at the RIKEN liner accelerator facility (RILAC). The Pb target with about 630 g/cm thickness was bombarded with 347.5, 351.5, and 355.5 MeV Zn beam. At the beam energy of 351.5 MeV, we observed one -decay chain from Cn. The -particle energy of Cn was MeV and its lifetime was measured to be 0.370 ms. Including our previous result of the Cn production in 2004, the cross section of the Pb(Zn, ) reaction is deduced to be pb.