Jun 21 – 26, 2015
Dipartimento di Fisica ed Astronomia, Università di Catania
Europe/Rome timezone
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Elastic scattering of 17O ions from 58Ni at near-barrier energies

Not scheduled
Aula Magna (Dipartimento di Fisica ed Astronomia, Università di Catania)

Aula Magna

Dipartimento di Fisica ed Astronomia, Università di Catania

Via Santa Sofia, 64 95123, Catania, Italy
Poster Reactions and Structure - Unstable Nuclei


Emanuele Strano (PD)

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A powerful tool for the study of weakly bound nuclei is the elastic scattering process, which provides a first information on the overall reactivity of the collision participants. We measured the elastic scattering angular distributions for the reaction 17O+58Ni in order to compare the reactivity of 17O (Sn= 4.143 MeV) with its mirror nucleus 17F (S_p= 0.600 MeV). The experiment was performed at the Laboratori Nazionali di Legnaro with an 17O beam in the energy range 40.0-50.0 MeV impinging on a 58Ni (150ug/cm2) target with a 208Pb (50ug/cm2) backing. Three Eres DSSSDs modules of the EXPADES [1] array where placed at +-50° (45°<theta<80°) and +110$^\circ$ (111°<theta<140°). Data were analyzed within the frame of the Optical Model using both Woods-Saxon and M3Y double-folding potentials. Fig. 1 shows the elastic scattering angular distributions and the optical model best fits for the two approaches. The resulting fit parameters agree with a model describing the 17O nucleus as a 16O core with a valence neutron orbiting in a d5/2 state [2]. The reduced total reaction cross sections, shown in the inset of Fig. 1, result to be slightly lower than those of 16O+58Ni system [3], but higher than those of 17F+58Ni system [4]. This outcome suggests that, for the pair 17O-17F, nuclear structure effects play a more relevant role than the projectile binding energy in the reaction dynamics at Coulomb barrier energies.

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