⁵⁸Ni(³He,t)⁵⁸Cu*(γ) measurements with GODDESS to constrain the astrophysical rate of ⁵⁷Ni(p,γ)⁵⁸Cu

Abstract The observation of γ rays from the decay of 44 Ti in the remnants of core-collapse supernovae (CCSNe) provides crucial information regarding the nucleosynthesis occurring in these events, as 44 Ti production is sensitive to CCSNe conditions. The final abundance of 44 Ti is also sensitive to specific nuclear input parameters, one of which is the 57 Ni(p, γ ) 58 Cu reaction rate. A precise rate for 57 Ni(p, γ ) 58 Cu is thus critical if 44 Ti production is to be an effective probe into CCSNe. To experimentally constrain the 57 Ni(p, γ ) 58 Cu rate, the structure properties of 58 Cu were measured via the 58 Ni( 3 He,t) 58 Cu*( γ ) reaction using GODDESS (GRETINA ORRUBA Dual Detectors for Experimental Structure Studies) at Argonne National Laboratory’s ATLAS facility. Details of the experiment, ongoing analysis, and plans are presented.