Abstract
We measured for the first time 7 Be elastically scattered nuclei as well as 3,4 He reaction products from a 58 Ni target at 22.3 MeV beam energy. The data were analyzed within the optical model formalism to extract the total reaction cross section. Extensive kinematical, Distorted Wave Born Approximation (DWBA) and Continuum Discretized Coupled Channel (CDCC) calculations were performed to investigate the 3,4 He originating mechanisms and the interplay between different reaction channels.
Highlights
The reaction dynamics induced by weakly-bound Radioactive Ion Beams (RIBs) at near-barrier energies has attracted the interest of the Nuclear Physics community for at least 20 years
In the present case we studied the interaction of the 7Be RIB with a 58Ni target at two energies around the Coulomb barrier. 7Be was chosen since it has a very small particle emission threshold (Sα = 1.586 MeV) and since the majority of direct processes gives rise to either 3He or 4He stable ions in the reaction output channels
The discussion about the limits imposed by our analysis to the cross sections of these two reaction mechanisms will be the subject of a forthcoming paper
Summary
The reaction dynamics induced by weakly-bound Radioactive Ion Beams (RIBs) at near-barrier energies has attracted the interest of the Nuclear Physics community for at least 20 years. This feature simplifies the experimental setup and avoids typical problems related to the low-efficiency detection of neutrons (as in 6,8He-, 9,11Li- and 9,11Be-reaction studies), the emission of radioactive or loosely-bound nuclei (as in the case of reactions involving 6,7Li or 8B) or the detection of projectile fragments with completely different mass ranges, and in turn energy domains, (as for 17F breaking up into 16O+p).
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