EPJ Web of Conferences (Mar 2014)

Exploring the stability of super heavy elements: First Measurement of the Fission Barrier of 254No

  • Henning G.,
  • Lopez-Martens A.,
  • Khoo T.L.,
  • Seweryniak D.,
  • Alcorta M.,
  • Asai M.,
  • Back B. B.,
  • Bertone P.,
  • Boilley D.,
  • Carpenter M. P.,
  • Chiara C. J.,
  • Chowdhury P.,
  • Gall B.,
  • Greenlees P. T.,
  • Gurdal G.,
  • Hauschild K.,
  • Heinz A.,
  • Hoffman C. R.,
  • Janssens R. V. F.,
  • Karpov A. V.,
  • Kay B. P.,
  • Kondev F. G.,
  • Lakshmi S.,
  • Lauristen T.,
  • Lister C. J.,
  • McCutchan E. A.,
  • Nair C.,
  • Piot J.,
  • Potterveld D.,
  • Reiter P.,
  • Rowley N.,
  • Rogers A. M.,
  • Zhu S.

DOI
https://doi.org/10.1051/epjconf/20146602046
Journal volume & issue
Vol. 66
p. 02046

Abstract

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The gamma-ray multiplicity and total energy emitted by the heavy nucleus 254No have been measured at 2 different beam energies. From these measurements, the initial distributions of spin I and excitation energy E∗ of 254No were constructed. The distributions display a saturation in excitation energy, which allows a direct determination of the fission barrier. 254No is the heaviest shell-stabilized nucleus with a measured fission barrier.