$\beta$ Decay and Isomeric Properties of Neutron-Rich Ca and Sc Isotopes

Abstract

The isomeric and $\beta$-decay properties of neutron-rich ${}^{53-57}$Sc and ${}^{53,54}$Ca nuclei near neutron number $N$=32 are reported, and the low-energy level schemes of ${}^{53,54,56}$Sc and ${}^{53-57}$Ti are presented. The low-energy level structures of the ${}_{21}$Sc isotopes are discussed in terms of the coupling of the valence $1f_{7/2}$ proton to states in the corresponding ${}_{20}$Ca cores. Implications with respect to the robustness of the $N$=32 subshell closure are discussed, as well as the repercussions for a possible $N$=34 subshell closure.

17 pages, 17 figures, accepted to Phys. Rev. C

References in corpus (3)

• Cross-shell excitation in two-proton knockout: Structure of ${}^{52}$Ca
• Beta decay of Neutron-Rich 53-56Ca
• Spectroscopy of the odd-odd fp-shell nucleus 52Sc from secondary fragmentation

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• Universal Effective Charges in the $sd$ and $fp$ Shells
• Spectroscopy of ${}^{54}$Ti and the systematic behavior of low energy octupole states in Ca and Ti isotopes
• Isomeric states in neutron-rich nuclei around $N=40$