Abstract
We present a high-resolution in-beam -ray spectroscopy study of excited states in the mirror nuclei and following one-nucleon knockout from a projectile beam of . The newly determined partial cross sections and the -decay properties of excited states provide a test of state-of-the-art nuclear structure models and probe mirror symmetry in unique ways. The new experimental data are compared to large-scale shell-model calculations in the full space which include charge-dependent contributions. A mirror asymmetry for the partial cross sections leading to the two lowest states in the mirror pair was identified as well as a significant difference in the decays from the state to the same two states. The mirror asymmetry in the partial cross sections cannot be reconciled with the present shell-model picture or small mixing introduced in a two-state model. The observed mirror asymmetry in the decay pattern, however, points at stronger mixing between the two lowest states in than in its mirror .
- Received 25 March 2019
DOI:https://doi.org/10.1103/PhysRevC.99.051304
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