Synthesis of the isotopes of elements 118 and 116 in the Cf 249 and Cm 245 + Ca 48 fusion reactions

The decay properties of ${}^{290}116$ and ${}^{291}116$, and the dependence of their production cross sections on the excitation energies of the compound nucleus, ${}^{293}116$, have been measured in the $^{245}\mathrm{Cm}$ ($^{48}\mathrm{Ca}$, $\mathit{xn}$)${}^{293\ensuremath{-}x}116$ reaction. These isotopes of element 116 are the decay daughters of element 118 isotopes, which are produced via the $^{249}\mathrm{Cf}+^{48}\mathrm{Ca}$ reaction. We performed the element 118 experiment at two projectile energies, corresponding to ${}^{297}118$ compound nucleus excitation energies of ${E}^{*}=29.2\ifmmode\pm\else\textpm\fi{}2.5$ and $34.4\ifmmode\pm\else\textpm\fi{}2.3$ MeV. During an irradiation with a total…

• UD
  U.S. Department of Energy

  Awards: W-7405, 7405-Eng-48
• RF
  Russian Foundation for Basic Research
• JI
  Joint Institute for Nuclear Research
• LL
  Lawrence Livermore National Laboratory

  Awards: -7405-Eng-48, W-7405-Eng-48
• OR
  Oak Ridge National Laboratory