Experiments on synthesis of the heaviest element at RIKEN

K. Morita, K. Morimoto, D. Kaji, T. Akiyama, S. Goto, H. Haba, E. Ideguchi, R. Kanumgo, K. Katori, H. Kikunaga, H. Koura, H. Kudo, T. Ohnishi, A. Ozawa, N. Sato, T. Suda, K. Sueki, F. Tokanai, H. Xu, T. YamaguchiA. Yoneda, A. Yoshida, Yuliang Zhao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

At the Institute of Physical and Chemical Research (RIKEN) a series of experiments studying the productions and their decays of the heaviest elements have been performed by using a gas-filled recoil ion separator GARIS. Results on the isotope of the 112th element, 277112, and on that of the 113th element, 278113, are reviewed. Tow decay chains which are assigned to be ones originating from the isotope 277112 were observed in the 208Pb(70Zn, n) reaction. Both chains consisted of four consecutive alpha decays followed by a spontaneous fission. The results provide a confirmation of the production and decay of the isotope 277112 reported by a research group at Gesellschaft für Schwerionenforschung (GSI), Germany, produced via the same reaction by using a velocity filter. Tow decay chains, both consisted of four consecutive alpha decays followed by a spontaneous fission, were observed also in the reaction 209Bi( 70Zn, n). Those are assigned to be the convincing candidate events of the decays of the isotope of the 113th element, 278113, and its daughter nuclei, 274Rg, 270Mt, 266Bh, and 262Db.

Original languageEnglish (US)
Title of host publicationTOURS SYMPOSIUM ON NUCLEAR PHYSICS VI
Pages3-9
Number of pages7
Volume891
DOIs
StatePublished - Apr 4 2007
EventTOURS SYMPOSIUM ON NUCLEAR PHYSICS VI - Tours, France
Duration: Sep 5 2006Sep 8 2006

Other

OtherTOURS SYMPOSIUM ON NUCLEAR PHYSICS VI
CountryFrance
CityTours
Period9/5/069/8/06

Keywords

  • Mt
  • Rg
  • Confirmation of 112
  • Gas-filled recoil separator
  • New isotopes 113

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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