High-resolution (p,t) reaction measurements as spectroscopic tests of {it ab-initio} theory in the mid $pf$-shell


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Detailed spectroscopic measurements of excited states in $^{50}$Cr and $^{62}$Zn were performed using 24~MeV (p,t) transfer reactions on $^{52}$Cr and $^{64}$Zn, respectively. In total, forty-five states in $^{50}$Cr and sixty-seven states in $^{62}$Zn were observed up to excitation energies of 5.5~MeV, including several previously unobserved states. These experimental results are compared to {it ab-initio} shell-model calculations using chiral effective field theory ($chi$-EFT) with the valence-space in-medium similarity renormalization group (VS-IMSRG) method. This comparison demonstrates good agreement in the level orderings with these new theoretical methods, albeit with a slight over binding in the calculations. This work is part of a continued push to benchmark {it ab-initio} theoretical techniques to nuclear structure data in $0^+rightarrow0^+$ superallowed Fermi $beta$ decay systems.

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