EPJ Web of Conferences (Mar 2014)
Study of the properties of the superheavy nuclei Z = 117 produced in the 249Bk + 48Ca reaction
- Oganessian Yu. Ts.,
- Abdullin F. Sh.,
- Alexander C.,
- Binder J.,
- Boll R. A.,
- Dmitriev S. N.,
- Ezold J.,
- Felker K.,
- Gostic J. M.,
- Grzywacz R. K.,
- Hamilton J. H.,
- Henderson R. A.,
- Itkis M. G.,
- Miernik K.,
- Miller D.,
- Moody K. J.,
- Polyakov A. N.,
- Ramayya A. V.,
- Roberto J. B.,
- Ryabinin M. A.,
- Rykaczewski K. P.,
- Sagaidak R. N.,
- Shaughnessy D. A.,
- Shirokovsky I. V.,
- Shumeiko M. V.,
- Stoyer M. A.,
- Stoyer N. J.,
- Subbotin V. G.,
- Sukhov A. M.,
- Tsyganov Yu. S.,
- Utyonkov V. K.,
- Voinov A. A.,
- Vostokin G. K.
Affiliations
- Oganessian Yu. Ts.
- Joint Institute for Nuclear Research
- Abdullin F. Sh.
- Joint Institute for Nuclear Research
- Alexander C.
- Oak Ridge National Laboratory
- Binder J.
- Oak Ridge National Laboratory
- Boll R. A.
- Oak Ridge National Laboratory
- Dmitriev S. N.
- Joint Institute for Nuclear Research
- Ezold J.
- Oak Ridge National Laboratory
- Felker K.
- Oak Ridge National Laboratory
- Gostic J. M.
- Lawrence Livermore National Laboratory
- Grzywacz R. K.
- Hamilton J. H.
- Department of Physics and Astronomy Vanderbilt University
- Henderson R. A.
- Lawrence Livermore National Laboratory
- Itkis M. G.
- Joint Institute for Nuclear Research
- Miernik K.
- Oak Ridge National Laboratory
- Miller D.
- Department of Physics and Astronomy, University of Tennessee
- Moody K. J.
- Lawrence Livermore National Laboratory
- Polyakov A. N.
- Joint Institute for Nuclear Research
- Ramayya A. V.
- Department of Physics and Astronomy Vanderbilt University
- Roberto J. B.
- Oak Ridge National Laboratory
- Ryabinin M. A.
- Research Institute of Atomic Reactors
- Rykaczewski K. P.
- Oak Ridge National Laboratory
- Sagaidak R. N.
- Joint Institute for Nuclear Research
- Shaughnessy D. A.
- Lawrence Livermore National Laboratory
- Shirokovsky I. V.
- Joint Institute for Nuclear Research
- Shumeiko M. V.
- Joint Institute for Nuclear Research
- Stoyer M. A.
- Lawrence Livermore National Laboratory
- Stoyer N. J.
- Lawrence Livermore National Laboratory
- Subbotin V. G.
- Joint Institute for Nuclear Research
- Sukhov A. M.
- Joint Institute for Nuclear Research
- Tsyganov Yu. S.
- Joint Institute for Nuclear Research
- Utyonkov V. K.
- Joint Institute for Nuclear Research
- Voinov A. A.
- Joint Institute for Nuclear Research
- Vostokin G. K.
- Joint Institute for Nuclear Research
- DOI
- https://doi.org/10.1051/epjconf/20146602073
- Journal volume & issue
-
Vol. 66
p. 02073
Abstract
The reaction of 249Bk with 48Ca have been reinvestigated to provide new evidence for the discovery of element 117 on a larger number of events. The experiments were performed at five projectile energies and with a total beam dose of 48Ca of about 4.6×1019. Two isotopes 293,294117 were synthesized in the 249Bk+48Ca reaction, providing excitation functions and α-decay spectra of the produced isotopes that establishes these nuclei to be the products of the 4n- and 3n-evaporation channels, respectively. Decay properties of 293,294117 and of all the daughter products agree with the data of the experiment in which these nuclei were synthesized for the first time in 2010. The new 289115 events, populated by α decay of 293117, demonstrate the same decay properties as those observed for 289115 produced in the 243Am(48Ca,2n) reaction thus providing crossbombardment evidence. In addition, a single decay of 294118 was observed from the reaction with 249Cf – a result of the in-growth of 249Cf in the 249Bk target.
