Neutron capture cross sections of light neutron-rich nuclei relevant for r -process nucleosynthesis

The measurements of neutron capture cross sections neutron-rich nuclei are challenging but essential for understanding nucleosynthesis and stellar evolution processes in the explosive burning scenario. In quest r-process abundances, according to neutrino-driven-wind model, light unstable may play a significant role as seed that influence abundance pattern. Hence, experimental data needed. Coulomb dissociation radioactive ion beams at intermediate energy is powerful indirect method inferring section. As test case validation method, section (n, γ) C14 was inferred from C15 (600A MeV). A comparison between different theoretical approaches results reaction discussed. We report first time Na28(n,γ)Na29, Na29(n,γ)Na30, Mg32(n,γ)Mg33, Al34(n,γ)Al35. were indirectly through Na29,30, Mg33, Al35 incident projectile energies around 400–430 MeV using FRS-LAND setup GSI, Darmstadt. obtained photoabsorption with aid detailed balance theorem. rates Na, Mg, Al typical temperatures measured (n,γ) sections. nuclei, Na28, Na29, Al34 significantly lower than those predicted by Hauser-Feshbach decay model. similar trend observed earlier C17 N19 C14(n,γ)C15 opposite. situation more complicated when ground state has multi-particle-hole configuration. For Mg32, about 40–90% higher prediction.6 MoreReceived 20 January 2021Revised 13 August 2021Accepted 24 2021DOI:https://doi.org/10.1103/PhysRevC.104.045801©2021 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasBreakup reactionsNuclear astrophysicsNuclear reactionsNucleosynthesis environmentsRadiative captureUnstable induced nuclear reactionsr processNuclear Physics