Abstract:
The Radioactive Ion Beam projects aim at the production
and acceleration of radioactive nuclei in the low and medium energy range
(<4.0 MeV per nucleon), which is of interest for cross section measurements
of important reactions in nuclear astrophysics. Specific examples of nuclear
reactions of astrophysical interest involving radioactive nuclei are the
15O (α, γ) 19Ne and 19Ne (p,
γ) 20Na reactions in which exotic nucleus 19Ne
plays a significant role in the hot pp-chain and hot CNO-cycle. We measured
cross-sections for some medium mass nuclei Cr, Mn, Fe and Co that had
been reported before that there are some anomalies for their productions
in stars if we consider just stable nuclei. In this study, we will show
how Radioactive Ion Beam factory will reproduce these synthesis reaction
paths in the laboratory and give a comparison of fusion-evaporation production
cross-sections for stable and unstable beams.It indicates
a clear enhancement of using radioactive beams to access nuclei far from
stability.
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