Located just one neutron removed from doubly magic, stable ${}^{48}\mathrm{Ca}$, the adjacent isotope ${}^{47}\mathrm{Ca}$ has been studied extensively with neutron-removing transfer reactions and interpreted within a shell-model picture. Neutron-adding transfer reactions onto the stable ${}^{46}\mathrm{Ca}$, however, have not been performed in nearly 60 years and never with the aid of high-resolution $\gamma$-ray spectroscopy. Here, we report on the ${}^{12}\mathrm{C}({}^{46}\mathrm{Ca},{}^{47}\mathrm{Ca}+\gamma )X$ one-neutron pickup reaction from ${}^{12}\mathrm{C}$ onto ${}^{46}\mathrm{Ca}$ at more than 50 MeV/nucleon, a regime of orbital angular momentum mismatch that selectively populates ${}^{47}\mathrm{Ca}$ final states based on $\ell \ge 3$ neutron configurations. Newly observed excited states and $\gamma$-ray transitions are discussed in comparison to $fp$ shell-model calculations in a variety of configuration spaces. It is shown that the nature of the observed spectrum of final states can be well interpreted, albeit with a significant fragmentation of the $\nu 0f_{5/2}$ strength observed in the measurement that is not borne out in the structure calculations.

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• Nuclear structure & decays
• Transfer reactions
• 39 ≤ A ≤ 58
• Gamma decay
• Spectrometers & spectroscopic techniques