Spin and magnetic moment of Mg33: Evidence for a negative-parity intruder ground state

D. T. Yordanov, M. Kowalska, K. Blaum, M. De Rydt, K. T. Flanagan, P. Lievens, R. Neugart, G. Neyens, H. H. Stroke

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    Abstract

    We report on the first determination of the nuclear ground-state spin of Mg33, I=3/2, and its magnetic moment, μ=-0.7456(5)μN, by combining laser spectroscopy with nuclear magnetic resonance techniques. These values are inconsistent with an earlier suggested 1 particle-1 hole configuration and provide evidence for a 2 particle-2 hole intruder ground state with negative parity. The results are in agreement with an odd-neutron occupation of the 3/2[321] Nilsson orbital at a large prolate deformation. The discussion emphasizes the need of further theoretical and experimental investigation of the island of inversion, a region previously thought to be well understood.

    Original languageEnglish (US)
    Article number212501
    JournalPhysical Review Letters
    Volume99
    Issue number21
    DOIs
    StatePublished - Nov 21 2007

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    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Yordanov, D. T., Kowalska, M., Blaum, K., De Rydt, M., Flanagan, K. T., Lievens, P., Neugart, R., Neyens, G., & Stroke, H. H. (2007). Spin and magnetic moment of Mg33: Evidence for a negative-parity intruder ground state. Physical Review Letters, 99(21), [212501]. https://doi.org/10.1103/PhysRevLett.99.212501