Dynamical Dipole and Equation of State in N/Z Asymmetric Fusion Reactions
1 Dipartimento di Fisica, Università di Milano and INFN sezione di Milano, via Celoria 16, 20133 Milano, Italy
2 INFN sezione di. Milano, via Celoria 16, 20133 Milano, Italy.
3 Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Legnaro, Italy
4 Dipartimento di Fisica, Università di Firenze and INFN sezione di Firenze, Firenze, Italy
5 Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud, Catania, Italy
6 The Henryk Niewodniczański Institute of Nuclear Physics, PAN, 31-342, Krakow, Poland
7 Dipartimento di Fisica, Università di Bologna and INFN sezione di Bologna, Bologna, Italy
8 INFN sezione di Napoli, Napoli, Italy
9 Dipartimento di Fisica e Astronomia dell'Università di Catania and Istituto Nazionale di Fisica Nucleare,Laboratori Nazionali del Sud, Catania, Italy
a e-mail: email@example.com
Published online: 20 March 2014
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.
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