Alpha-particle optical potential proofs at astrophysically relevant energies

Abstract

$(\alpha ,\gamma )$ and $(\alpha$,n) reaction cross sections recently measured close to the reaction thresholds are rather well described by a previously developed regional optical potential. Thus, particular features of the $\alpha$-particle optical potential at energies below the Coulomb barrier, besides parameters describing $\alpha$-particle elastic scattering at higher energies are confirmed. Additional limitations of similar statistical model calculations for minor reaction channels are shown to be most likely due to an overlooked process or critical values of statistical model parameters around closed nuclear shells.

4 pages, 3 figures

References in corpus (4)

• Tables of Nuclear Cross Sections and Reaction Rates: an Addendum to the Paper "Astrophysical Reaction Rates from Statistical Model Calculations"
• Cross section measurements of $\alpha$-induced reactions on ${}^{92,94}$Mo and ${}^{112}$Sn for $p$-process studies
• Astrophysical relevance of $\gamma$ transition energies
• Crucial inputs to nucleosynthesis calculations

Cited by in corpus (4)

• Analysis of uncertainties in alpha-particle optical-potential assessment below the Coulomb barrier
• Consistent optical potential for incident and emitted low-energy $\alpha$ particles. II. $\alpha$-emission in fast-neutron induced reactions on Zr isotopes
• Role of consistent parameter sets in an assessment of the alpha-particle optical potential below the Coulomb barrier
• Astrophysical Rates for Explosive Nucleosynthesis: Stellar and Laboratory Rates for Exotic Nuclei