STORI24: Constraining Explosive Nucleosynthesis by Indirect Reaction Methods at Storage Rings using unstable beams in batch mode

Abstract Nuclear reaction studies on unstable isotopes can strongly help in improving our understanding of nucleosynthesis in stars. Indirect approaches to determining astrophysical reaction rates are increasingly common-place and undergoing continuous refinement. Of particular interest is the use of such indirect techniques at storage rings, which, among other allow to recycle rare unstable beams. We propose to investigate reaction rates of astrophysical interest using indirect methods (surrogate, Trojan horse….) in reverse kinematics at the IMP-CAS storage ring. Long lived radioactive ion beams, produced remotely, can be accelerated, and made interacting with light targets. Proposed reactions are 85Kr(p,p’γ), 85Kr(d,pγ), constraining the neutron flux in an s-process branching point, 79Se(p,p’γ), 79Se(d,pγ), constraining the temperature in s-process nucleosyntheses, 59Fe(d,pγ), constraining core collapse supernovae.