Abstract
Calculations of breakup and direct proton transfer for the 8 B+ 58 Ni system at energies around the Coulomb barrier ( E B,lab =22.95 MeV) were performed by the continuum-discretized coupled channels (CDCC) method and the coupled-reaction-channels (CRC) method, respectively. For the 7 Be+ 58 Ni interaction, we used a semimicroscopic optical model potential (OMP) that combines microscopic calculations of the mean-field double folding potential and a phenomenological construction of the dynamical polarization potential (DPP). The 7 Be angular distribution at E lab =25.75 MeV from the 8 B breakup on 58 Ni was calculated and the spectroscopic factor for 8 B → 7 Be+ p vertex, S expt = 1.10 ± 0.05, was deduced. The astrophysical S 17 (0) factor was calculated equal to 20.7 ±1.1 eV•b, being in good agreement with the previously reported values.
Highlights
The study of nuclear reactions with the proton-halo exotic 8B nuclei is of great interest for nuclear astrophysics in view of the problem of stellar nucleosynthesis and the production of high-energy neutrinos in the Sun
We studied the breakup of 8B in the field of 58Ni with the realistic 7Be core-target potential calculated in the semi-microscopic optical model potential (OMP)
A comparison was made with calculations performed by using the Woods-Saxon potentials previously reported [1]
Summary
The study of nuclear reactions with the proton-halo exotic 8B nuclei is of great interest for nuclear astrophysics in view of the problem of stellar nucleosynthesis and the production of high-energy neutrinos in the Sun. In particular, the breakup of 8B in the field of heavy targets can provide information about an inverse process, the proton radiative capture by 7Be, which occurs in the Sun at energies about 20 keV. The 8B+58Ni system has been extensively studied both experimentally and theoretically by different research groups around the world. We studied the breakup of 8B in the field of 58Ni with the realistic 7Be core-target potential calculated in the semi-microscopic OMP. The analysis of the breakup, transfer and elastic-scattering cross sections allowed us to obtain the experimental spectroscopic factor S expt and extract the astrophysical S 17(0) factor by using the ANC method. A comparison was made with calculations performed by using the Woods-Saxon potentials previously reported [1]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
