S R Carmichael, D W Bardayan, S D Pain, A Ratkiewicz, P D O'Malley, J Allen, T L Bailey, C Boomershine, M Brodeur, C M Campbell, M P Carpenter, K A Chipps, J A Cizewski, S Coil, P A Copp, C Dembski, J Forson, H I Garland, R Ghimire, T Gore, C R Jones, K L Jones, J Koros, J Kovoor, K Lee, P L D Magro, J McDonaugh, G Mulcahy, C Müller-Gatermann, W S Porter, F Rivero, D Robertson, J Rufino, A T Sanchez, D Seweryniak, M Siciliano, H Sims, E Stech, R Surman, C C Ummel, W W von Seeger, G Wilson, S Zhu, R Zite
An important validation of nucleosynthesis models of core-collapse supernovae is the comparison of radioisotope predictions to abundances inferred from observations of γ rays emitted in remnants. One such isotope, ^{44}Ti, is especially sensitive to the ^{57}Ni(p,γ)^{58}Cu reaction rate. Despite this importance, no experimentally constrained rate exists for this reaction. It is thus crucial to determine this rate. GRETINA ORRUBA: Dual Detectors for Experimental Structure Studies (GODDESS) was used along with the first use of the Enge split-pole spectrograph at Notre Dame to measure structure properties of ^{58}Cu via the ^{58}Ni(^{3}He,t)^{58}Cu reaction. The combined analysis of these complementary data sets allows for precise determination of ^{58}Cu level energies, and spins are constrained from analysis of the γ-ray decay. ^{44}Ti yields were found to change by over 25% compared to previous estimates in model calculations using the new experimentally constrained reaction rate.