https://doi.org/10.1051/epjconf/201716300043
Dynamical Dipole mode in heavy-ion fusion reactions
1
INFN - Napoli, Napoli, Italy
2
INFN - LNS, Catania, Italy
3
University of Bucharest, Bucharest and NIPNE-HH, Magurele, Romania
4
INFN - Catania, Catania, Italy
5
Dip. di Fisica e Astronomia, Università di Catania, Catania, Italy
6
INFN - Gr. Col. di Messina and Università di Messina, Messina, Italy
7
GSI, Darmstadt, Germany
8
Dip. di Fisica, Università di Milano and INFN - Milano, Milano, Italy
9
Dip. di Fisica, Università di Napoli, Napoli, Italy
10
Dip. di Fisica e Astronomia, Università di Padova and INFN - Padova, Padova, Italy
* e-mail: concetta.parascandolo@na.infn.it
Published online: 22 November 2017
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.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
