Evolution of nuclear structure in neutron-rich odd-Zn isotopes and isomers

Wraith, C.; Yang, X.F.; Xie, L.; Babcock, C.; Bierón, J.; Billowes, J.; Bissell, M.L.; Blaum, Klaus; Cheal, B.; Filippin, L.; Ruiz, R.F. Garcia; Gins, W.; Grob, L.K.; Gaigalas, G.; Godefroid, M.; Gorges, C.; Heylen, H.; Honma, M.; Jönsson, P.; Kaufmann, S.; Kowalska, M.; Krämer, J.; Malbrunot-Ettenauer, S.; Neugart, Rainer; Neyens, G.; Nörtershäuser, W.; Nowacki, F.; Otsuka, T.; Papuga, J.; Sánchez, R.; Tsunoda, Y.; Yordanov, D.T.

doi:10.1016/j.physletb.2017.05.085

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Evolution of nuclear structure in neutron-rich odd-Zn isotopes and isomers

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

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Neugart, Rainer
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
Institut für Kernchemie, Universität Mainz, D-55128 Mainz, Germany;

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https://doi.org/10.1016/j.physletb.2017.05.085
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Citation

Wraith, C., Yang, X., Xie, L., Babcock, C., Bierón, J., Billowes, J., et al. (2017). Evolution of nuclear structure in neutron-rich odd-Zn isotopes and isomers. Physics Letters B, 771, 385-391. doi:10.1016/j.physletb.2017.05.085.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-82EC-9

Abstract

Collinear laser spectroscopy was performed on Zn (Z=30) isotopes at ISOLDE, CERN. The study of hyperfine spectra of nuclei across the Zn isotopic chain, N=33–49, allowed the measurement of nuclear spins for the ground and isomeric states in odd-A neutron-rich nuclei up to N=50. Exactly one long-lived (>10 ms) isomeric state has been established in each ^69–79Zn isotope. The nuclear magnetic dipole moments and spectroscopic quadrupole moments are well reproduced by large-scale shell–model calculations in the f₅pg₉ and fpg₉d₅ model spaces, thus establishing the dominant term in their wave function. The magnetic moment of the intruder I^π=1/2⁺ isomer in ⁷⁹Zn is reproduced only if the νs_1/2 orbital is added to the valence space, as realized in the recently developed PFSDG-U interaction. The spin and moments of the low-lying isomeric state in ⁷³Zn suggest a strong onset of deformation at N=43, while the progression towards ⁷⁹Zn points to the stability of the =28 and =50 shell gaps, supporting the magicity of ⁷⁸Ni.