Attempt to produce the 3rd chain of
113
Morimoto, Koji*; Morita, Kosuke*; Kaji, Daiya*; Akiyama, Takahiro*; Goto, Shinichi*; Haba, Hiromitsu*; Ideguchi, Eiji*; Katori, Kenji*; Koura, Hiroyuki
; Kudo, Hisaaki*; Ozawa, Akira*; Ozeki, Kazutaka*; Sato, Nozomi*; Tokanai, Fuyuki*; Yamaguchi, Takayuki*; Yoneda, Akira*; Yoshida, Atsushi*
In 2003-2007, we had performed an experiment to synthesize an element 113 by a
Bi
Zn reaction using a gas-filled recoil ion separator (GARIS) at RIKEN Nishina-Center. In a total of 241 days of net irradiation time experiment, two decay chains were observed and assigned from an isotope
113. The cross section of the
Bi(
Zn,n)
113 reaction was determined to be 31
fb at that time. In order to increase the statistics of the decay property, we continued to produce more decay chains. The experiment was carried out from January 7 to March 31, 2008. The experimental conditions were identical to those used in the previous experiment.
Zn ion beam of 353 MeV was extracted from RILAC. The net irradiation time was 83 days and the total dose of
Zn was 2.28
. In the present expriment any candidate of
113 was not observed. Then combining the results of the present and previous experiments, the production cross section of
113 was determined to be 22
fb.