Abstract
In the present work, we report a comprehensive theoretical study of the values for the allowed and forbidden decay transitions of and corresponding to recently available experimental data from the GRIFFIN spectrometer at TRIUMF-ISAC [Phys. Rev. C 100, 054327 (2019); Phys. Rev. C 102, 054314 (2020)]. We perform the nuclear shell-model calculation in -valence space, with the SDPF-MU interaction, to calculate low-lying energy spectra of and . For further investigation, we also calculate spectroscopic properties of and and compare the results with the experimental data. We suggest the spin-parity of several levels, which was previously tentative, in both the calcium isotopes. Based on the energy and values, we conclude that the state at 3.984 MeV in could be either or and a state at 4.432 MeV might be . The spin-parity of the states at 2.875, 3.951, and 4.453 MeV are predicted to be , and or , respectively, in . We also give the confirmation to the spin-parity of 2.850, 3.889, and 4.606 MeV states for . Our results of level schemes of are in reasonable agreement with the experimental data, while the agreement of calculated values for the decay with the experimental data is limited.
- Received 14 April 2021
- Revised 7 June 2021
- Accepted 14 June 2021
DOI:https://doi.org/10.1103/PhysRevC.103.064325
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