DOI: 10.1140/epja/i2001-10254-4
Synthesis of superheavy nuclei in the reactions of
and
with
Yu.Ts. Oganessian1, V.K. Utyonkov1, Yu.V. Lobanov1, F.Sh. Abdullin1, A.N. Polyakov1, I.V. Shirokovsky1, Yu.S. Tsyganov1, G.G. Gulbekian1, S.L. Bogomolov1, B.N. Gikal1, A.N. Mezentsev1, S. Iliev1, V.G. Subbotin1, A.M. Sukhov1, O.V. Ivanov1, G.V. Buklanov1, K. Subotic1, A.A. Voinov1, M.G. Itkis1, K.J. Moody2, J.F. Wild2, N.J. Stoyer2, M.A. Stoyer2, R.W. Lougheed2 and C.A. Laue2
1 Joint Institute for Nuclear Research, 141980 Dubna, Russian Federation
2 University of California, Lawrence Livermore National Laboratory, Livermore, CA 94551, USA
utyonkov@sungns.jinr.ru
(Received: 21 March 2002 / Published online: 31 October 2002)
Abstract
This paper presents results of the experiments aimed at
producing long-lived superheavy elements located near the spherical-shell
closures with
and
in the
+
and
+
reactions.
The large measured
-particle energies of the newly observed nuclei,
together with the long decay times and spontaneous fission terminating the
chains, offer evidence of the decay of nuclei with high atomic numbers. The
decay properties of the synthesized nuclei are consistent with the
consecutive
-decays originating from the parent nuclides
288,289114 and
292116, produced in the
3n and
4n evaporation channels with cross-sections of about a picobarn. The present
observations can be considered as experimental evidence of the existence of
the "island of stability" of superheavy elements.
23.60.+e - Alpha decay.
25.70.-z - Low and intermediate energy heavy-ion reactions.
27.90.+b -

© Società Italiana di Fisica, Springer-Verlag 2002