EPJ Web of Conferences (Mar 2014)

Dynamical Dipole and Equation of State in N/Z Asymmetric Fusion Reactions

  • Giaz Agnese,
  • Corsi Anna,
  • Camera Franco,
  • Wieland Oliver,
  • Kravchuk Vladimir L.,
  • Barlini Sandro,
  • Alba Rosa,
  • Bednarczyk P.,
  • Bracco Angela,
  • Baiocco Giorgio,
  • Bardelli Luigi,
  • Benzoni Giovanna,
  • Bini M.,
  • Blasi Nives,
  • Brambilla Sergio,
  • Bruno Mauro,
  • Casini Giovanni,
  • Ciemala Michal,
  • Cinausero Marco,
  • Chiari M.,
  • Colonna Maria,
  • Crespi Fabio Celso Luigi,
  • D’Agostino Michela,
  • Degerlier Meltem,
  • Di Toro Massimo,
  • Gramegna Fabiana,
  • Kmiecik Maria,
  • Leoni Silvia,
  • Maiolino C.,
  • Maj Adam,
  • Marchi Tommaso,
  • Mazurek K.,
  • Meczynski W.,
  • Million Benedicte,
  • Montanari Daniele,
  • Morelli Luca,
  • Nannini Adriana,
  • Nicolini Roberto,
  • Pasquali G.,
  • Piantelli S.,
  • Ordine A.,
  • Poggi Giacomo,
  • Rizzi V.,
  • Rizzo Carmelo,
  • Santonocito Domenico,
  • Vandone Valeria,
  • Vannini G.

DOI
https://doi.org/10.1051/epjconf/20146603033
Journal volume & issue
Vol. 66
p. 03033

Abstract

Read online

In heavy ion reactions, in the case of N/Z asymmetry between projectile and target, the process leading to complete fusion is expected to produce pre-equilibrium dipole γ-ray emission. It is generated during the charge equilibration process and it is known as Dynamical Dipole. A new measurement of the dynamical dipole emission was performed by studying 16O + 116Sn at 12 MeV/u. These data, together with those measured at 8.1 MeV/u and 15.6 MeV/u for the same reaction, provide the dependence on the Dynamical Dipole total emission yield with beam energy and they can be compared with theoretical expectations. The experimental results show a weak increase of the Dynamical Dipole total yield with beam energies and are in agreement with the prediction of a theoretical model based on the Boltzmann–Nordheim–Vlasov (BNV) approach. The measured trend with beam energy does not confirm the rise and fall behavior previously reported for the same fused compound but with a much higher dipole moment.