Systematics of fission barriers in superheavy elements

T. Bürvenich, M. Bender, J. A. Maruhn, and P.-G. Reinhard
Phys. Rev. C 69, 014307 – Published 23 January 2004

Abstract

We investigate the systematics of fission barriers in superheavy elements in the range Z=108120 and N=166182. Results from two self-consistent models for nuclear structure, the relativistic mean-field (RMF) model as well as the nonrelativistic Skyrme-Hartree-Fock approach are compared and discussed. We restrict ourselves to axially symmetric shapes, which provides an upper bound on static fission barriers. We benchmark the predictive power of the models examining the barriers and fission isomers of selected heavy actinide nuclei for which data are available. For both actinides and superheavy nuclei, the RMF model systematically predicts lower barriers than most Skyrme interactions. In particular, the fission isomers are predicted too low by the RMF, which casts some doubt on recent predictions about superdeformed ground states of some superheavy nuclei. For the superheavy nuclei under investigation, fission barriers drop to small values around Z=110, N=180, and increase again for heavier systems. For most of the forces, there is no fission isomer for superheavy nuclei, as superdeformed states are in most cases found to be unstable with respect to octupole distortions.

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  • Received 14 February 2003
  • Corrected 30 January 2004

DOI:https://doi.org/10.1103/PhysRevC.69.014307

©2004 American Physical Society

Corrections

30 January 2004

Erratum

Publisher's Note: Systematics of fission barriers in superheavy elements [Phys. Rev. C 69, 014307 (2004)]

T. Burvenich, M. Bender, J. A. Maruhn, and P.-G. Reinhard
Phys. Rev. C 69, 029901 (2004)

Authors & Affiliations

T. Bürvenich1, M. Bender2, J. A. Maruhn3,4, and P.-G. Reinhard4,5

  • 1Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
  • 2Service de Physique Nucléaire Théorique, Université Libre de Bruxelles, CP 229, B-1050 Brussels, Belgium
  • 3Institut für Theoretische Physik, Universität Frankfurt, Robert-Mayer-Strasse 8-10, D-60325 Frankfurt am Main, Germany
  • 4Joint Institute for Heavy-Ion Research, Oak Ridge National Laboratory, P. O. Box 2008, Oak Ridge, Tennessee 37831, USA
  • 5Institut für Theoretische Physik II, Universität Erlangen-Nürnberg, Staudtstrasse 7, D-91058 Erlangen, Germany

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Issue

Vol. 69, Iss. 1 — January 2004

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