Neutron capture reactions relevant to s-process and p-process in the domain of the $N=50$ shell closure

Abstract

Radiative thermal neutron capture cross sections for nuclei participating in s-process and p-process nucleosynthesis in and around $N=50$ closed neutron shell have been calculated in statistical semi-microscopic Hauser-Feshbach approach for the energy range of astrophysical interest. A folded optical model potential is constructed utilizing the standard DDM3Y real nucleon-nucleon interaction. The folding of the interaction with target radial matter densities, obtained from the relativistic-mean-field approach, is done in coordinate space using the spherical approximation. The standard nuclear reaction code TALYS1.8 is used for cross-section calculation. The cross sections are compared with experimental results and reasonable agreements are found for almost all cases. Maxwellian-averaged cross sections (MACS) for the nuclei are presented at a single thermal energy of 30 keV relevant to s-process. We have also presented the MACS values over a range of energy from 5 to 100 keV for neutron magic nuclei with $(N=50)$.

arXiv comment16 pages, 10 figures, 4 tables

References in corpus (10)

• Microscopic HFB+QRPA predictions of dipole strength for astrophysics applications
• Experimental (n,$\gamma$) cross sections of the p-process nuclei ${}^{74}$Se and ${}^{84}$Sr
• Microscopic calculation of proton capture reactions in mass 60-80 region and its astrophysical implications
• Relativistic Mean Field in $A\approx$80 nuclei and low energy proton reactions
• Low energy proton reactions of astrophysical interest in A$\sim 90-100$ region
• Endpoint of $rp$ process using relativistic mean field approach and a new mass formula
• Neutron Capture Reactions near N=82 Shell-Closure
• Low-energy proton capture reactions in the mass region 55-60
• Microscopic Study of (p,$\gamma$) Reactions in Mass Region A=110-125
• Radiative proton capture cross sections in the mass range $40-55$

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