https://doi.org/10.1140/epja/i2016-16116-0
Regular Article - Experimental Physics
Remarks on the fission barriers of super-heavy nuclei
1
GSI Helmholtzzentrum für Schwerionenforschung, 64291, Darmstadt, Germany
2
Institut für Physik, Goethe-Universität Frankfurt, 60438, Frankfurt, Germany
3
Department of Nuclear Physics and Biophysics, Comenius University, 84248, Bratislava, Slovakia
4
Johannes Gutenberg-Universität Mainz, 55128, Mainz, Germany
5
Oak Ridge National Laboratory, 37831, Oak Ridge, TN, USA
6
University of Tennessee, 37996, Knoxville, TN, USA
7
Department of Physics and Astronomy, Vanderbilt University, 37235, Nashville, TN, USA
8
Lawrence Livermore National Laboratory, 94551, Livermore, CA, USA
9
University of Warsaw, Warsaw, Poland
10
RIKEN Nishina Center for Accelerator-Based Science, 2-1, Hirosawa, 351-0198, Wako, Saitama, Japan
11
Japan Atomic Energy Agency, 319-1195, Tokai, Ibaraki, Japan
12
Joint Institute for Nuclear Research, 141980, Dubna, Russian Federation
13
Department of Physics, University of Jyväskylä, 40351, Jyväskylä, Finland
* e-mail: S.Hofmann@gsi.de
Received:
14
March
2015
Accepted:
29
February
2016
Published online:
27
April
2016
Shell-correction energies of super-heavy nuclei are approximated by using values of measured decay chains. Five decay chains were analyzed, which start at the isotopes 285Fl, 294118, 291Lv, 292Lv and 293Lv. The data are compared with predictions of macroscopic-microscopic models. Fission barriers are estimated that can be used to eliminate uncertainties in partial fission half-lives and in calculations of evaporation-residue cross-sections. In that calculations, fission probability of the compound nucleus is a major factor contributing to the total cross-section. The data also provide constraints on the cross-sections of capture and quasi-fission in the entrance channel of the fusion reaction. Arguments are presented that fusion reactions for synthesis of isotopes of elements 118 and 120 may have higher cross-sections than assumed so far.
© SIF, Springer-Verlag Berlin Heidelberg, 2016