Experiment on the Synthesis of Element 113 in the Reaction<sup>209</sup>Bi(<sup>70</sup>Zn,n)<sup>278</sup>113
Kosuke MoritaRIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198K. MorimotoRIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198D. KajiRIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198Takahiro AkiyamaDepartment of Physics, Saitama University, Sakura-ku, Saitama 338-8570Sin-ichi GotoCenter for Instrumental Analysis, Niigata University, Ikarashi, Niigata 950-2181Hiromitsu HabaRIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198E. IdeguchiCenter for Nuclear Study, University of Tokyo Wako Branch, Wako, Saitama 351-0198R. KanungoRIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198Kenji KatoriRIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198H. KouraAdvanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195Hisaaki KudoDepartment of Chemistry, Niigata University, Ikarashi, Niigata 950-2181T. OhnishiRIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198Akira OzawaUniversity of Tsukuba, Tsukuba, Ibaraki 305-8571T. SudaRIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198Keisuke SuekiUniversity of Tsukuba, Tsukuba, Ibaraki 305-8571HuShan XuInstitute of Modern Physics, Chinese Academy of Science, Lanzhou 730000, ChinaTakayuki YamaguchiDepartment of Physics, Saitama University, Sakura-ku, Saitama 338-8570Akira YonedaRIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198Atsushi YoshidaRIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198Yu-Liang ZhaoInstitute of High Energy Physics, Chinese Academy of Science, Beijing 100039, China
2004en
ABI
Annotatsiya
The convincing candidate event of the isotope of the 113th element, 278 113, and its daughter nuclei, 274 111 and 270 Mt, were observed, for the first time, in the 209 Bi + 70 Zn reaction at a beam energy of 349.0 MeV with a total dose of 1.7 ×10 19 . Alpha decay energies and decay times of the candidates, 278 113, 274 111, and 270 Mt, were (11.68 ±0.04 MeV, 0.344 ms), (11.15 ±0.07 MeV, 9.26 ms), and (10.03 ±0.07 MeV, 7.16 ms), respectively. The production cross section of the isotope was deduced to be 55 +150 -45 fb (10 -39 cm 2 ).
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