Constraining astrophysical reaction rates on ground-states and astromers at ReA: simultaneous measurement of the ^38g,mK(d,p) reactions

The combination of ReA@FRIB will provide unique opportunities for simultaneous studies of reactions on nuclides where reactions on ground states and astromers play a role. The ReA facility can provide high-quality mixed beams of ground and isomeric states, the ratio of which can be manipulated by adjusting the fragment separator settings and hold-up times in the stopping and reacceleration process, without impact on beam optics. This control can be used to disentangle reaction cross sections measured on the two beam components with minimal systematic impacts on the experimental response. This technique has been demonstrated with a study of the ^38g,mK(d,p) reactions, using ReA@NSCL, to constrain the astrophysical ^38g,mK(p,g) reaction rates via mirror symmetry. These reaction rates are bottlenecks impacting the final abundances around the endpoint of nucleosynthesis in ONe novae, including isotopic abundances of Ca and Ar. Details of the technique and experiment will be presented, along with an outlook toward such measurement opportunities at FRIB.