EPJ Web of Conferences (Jan 2017)

Dynamical Dipole mode in heavy-ion fusion reactions

  • Parascandolo C.,
  • Pierroutsakou D.,
  • Alba R.,
  • Del Zoppo A.,
  • Maiolino C.,
  • Santonocito D.,
  • Agodi C.,
  • Baran V.,
  • Boiano A.,
  • Colonna M.,
  • Coniglione R.,
  • De Filippo E.,
  • Di Toro M.,
  • Emanuele U.,
  • Farinon F.,
  • Guglielmetti A.,
  • La Commara M.,
  • Martin B.,
  • Mazzocchi C.,
  • Mazzocco M.,
  • Rizzo C.,
  • Romoli M.,
  • Signorini C.,
  • Silvestri R.,
  • Soramel F.,
  • Strano E.,
  • Torresi D.,
  • Trifirò A.,
  • Trimarchi M.

DOI
https://doi.org/10.1051/epjconf/201716300043
Journal volume & issue
Vol. 163
p. 00043

Abstract

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The excitation of the Dynamical Dipole mode along the fusion path was investigated for the first time in the formation of a heavy compound nucleus in the A~190 mass region. The compound nucleus was formed at identical conditions of excitation energy and spin from two entrance channels having different charge asymmetry: the charge asymmetric 40Ca + 152Sm and the nearly charge symmetric 48Ca + 144Sm at Elab=11 and 10.1 MeV/nucleon, respectively. Both fusion–evaporation and fission events were studied simultaneously for the first time. The Dynamical Dipole mode excitation in the charge asymmetric channel was evidenced, in a model-independent way, by comparing the γ-ray multiplicity spectra and angular distributions of the two entrance channels with each other.