Experiment on Synthesis of an Isotope <sup>277</sup>112 by <sup>208</sup>Pb+<sup>70</sup>Zn Reaction
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, Niigata 950-2181Hiromitsu HabaRIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198E. IdeguchiCenter for Nuclear Study, University of Tokyo, Wako, Saitama 351-0198Kenji KatoriRIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198H. KouraJapan Atomic Energy Agency, Tokai, Ibaraki 319-1195Hisaaki KudoDepartment of Chemistry, Niigata University, 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 305-8571Fuyuki TokanaiDepartment of Physics, Yamagata University, Yamagata 990-8560Takayuki 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 351-0198
2007en
ABI
Аннотация
The production and decay of 277 112 have been investigated using a gas-filled recoil ion separator in irradiations of 208 Pb targets with a 70 Zn beam at 349.5 MeV. We have observed two α-decay chains that can be assigned to subsequent decays from 277 112 produced in the 208 Pb( 70 Zn,n) reaction. After emitting four consecutive α-particles, both the chains terminate by spontaneous fission decays of 261 Rf, and the decay energies and decay times of both the chains obtained in the present work agree well with those reported by a group at Gesellschaft für Schwerionenforschung (GSI), Germany. The present result gives the first clear confirmation of the discovery of 277 112 and its α-decay product 273 Ds reported previously.
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