Cross-shell excited configurations in the structure of 34Si

Lubna, R. S.; Garnsworthy, A. B.; Vandana, Tripathi; Ball, G. C.; Natzke, C. R.; Rocchini, M.; Andreoiu, C.; Bhattacharjee, S. S.; Dillmann, I.; Garcia, F. H.; Gillespie, S. A.; Hackman, G.; Griffin, C. J.; Leckenby, G.; Miyagi, T.; Olaizola, B.; Porzio, C.; Rajabali, M. M.; Saito, Y.; Spagnoletti, P.; Tabor, S. L.; Umashankar, R.; Vedia, V.; Volya, A.; Williams, J.; Yates, D.

doi:10.1103/PhysRevC.109.014309

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Cross-shell excited configurations in the structure of ³⁴Si

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Miyagi, T.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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https://journals.aps.org/prc/pdf/10.1103/PhysRevC.109.014309
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Citation

Lubna, R. S., Garnsworthy, A. B., Vandana, T., Ball, G. C., Natzke, C. R., Rocchini, M., et al. (2024). Cross-shell excited configurations in the structure of ³⁴Si. Physical Review C, 109(1): 014309. doi:10.1103/PhysRevC.109.014309.

Cite as: https://hdl.handle.net/21.11116/0000-000E-4E56-B

Abstract

The cross-shell excited states of ³⁴Si have been investigated via β decays of the 4⁻ ground state and the 1⁺ isomeric state of ³⁴Al. Since the valence protons and valence neutrons occupy different major shells in the ground state as well as the intruder 1⁺ isomeric state of ³⁴Al, intruder levels of ³⁴Si are populated via allowed β decays. Spin assignments to such intruder levels of ³⁴Si were established through γ−γ angular correlation analysis for the negative-parity states with dominant configurations (νd_3/2)⁻¹⊗(νf_7/2)¹ as well as the positive-parity states with dominant configurations (νsd)⁻²⊗(νf_7/2p_3/2)². The configurations of such intruder states play crucial roles in our understanding of the N=20 shell gap evolution. A configuration interaction model derived from the FSU Hamiltonian was utilized in order to interpret the intruder states in ³⁴Si. Shell model interaction derived from a more fundamental theory with the valence space in medium similarity renormalization group method was also employed to interpret the structure of ³⁴Si.