Structure of Mg Isotope Studied by β-Decay Spectroscopy of Spin-Polarized Na Isotopes : Shape Coexistence in ³⁰Mg (Frontier Issues in Physics of Exotic Nuclei) Structure of Mg Isotope Studied by β-Decay Spectroscopy of Spin-Polarized Na Isotopes : Shape Coexistence in ^<30>Mg

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Author(s)

Abstract

We have been studying the structure of Mg isotopes in the region of the N = 20 island of inversion, to clarify the structure change as a function of the neutron number. The experiments are being performed by our unique method of β-decay spectroscopy taking advantage of highly-spin-polarized radioactive nuclear beams at TRIUMF. The β-decay asymmetry in the Na-isotope decay enables unambiguous spin-parity assignments of the levels in the daughter Mg isotope, and it becomes possible to compare the experimental data and theoretical predictions on a level-by-level basis. The present paper reports on the results of the β decay of ^<30>Na→^<30>Mg. From the detailed decay scheme of ^<30>Na, it is suggested that the ^<30>Mg levels at 1.788 MeV [(0^+_2)], 3.460 MeV [(2)^+], 4.967 MeV [1^+], and 5.414 MeV [2^+] have deformed shapes with intruder configurations, whereas the level at 2.466 MeV [(2^+_2)] has different nature both from the spherical ground state and the deformed four levels. It is proposed that the 2^+_2 level is the band-head of the predicted γ-band.

Journal

  • Progress of theoretical physics

    Progress of theoretical physics (196), 310-315, 2012-10-22

    Publication Office, Progress of Theoretical Physics

References:  18

Codes

  • NII Article ID (NAID)
    110009543689
  • NII NACSIS-CAT ID (NCID)
    AA00791466
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    03759687
  • NDL Article ID
    024019961
  • NDL Call No.
    Z53-A468
  • Data Source
    CJP  NDL  NII-ELS  NDL-Digital 
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