Structure of Mg Isotope Studied by beta-Decay Spectroscopy of Spin-Polarized Na Isotopes - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Conference Papers Progress of Theoretical Physics Supplement Year : 2012

Structure of Mg Isotope Studied by beta-Decay Spectroscopy of Spin-Polarized Na Isotopes

T. Shimoda
  • Function : Author
K. Tajiri
  • Function : Author
A. Odahara
  • Function : Author
M. Suga
  • Function : Author
N. Hamatani
  • Function : Author
H. Nishibata
  • Function : Author
J. Takatsu
  • Function : Author
R. Yokoyama
  • Function : Author
Y. Hirayama
  • Function : Author
N. Imai
  • Function : Author
H. Miyatake
  • Function : Author
M. Pearson
  • Function : Author
C. D. P. Levy
  • Function : Author
K. P. Jackson
  • Function : Author
R. Leguillon
  • Function : Author
C. Petrache
  • Function : Author

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 beta-decay spectroscopy taking advantage of highly-spin-polarized radioactive nuclear beams at TRIUMF. The beta-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 beta decay of Na-30 -> Mg-30. From the detailed decay scheme of Na-30, it is suggested that the Mg-30 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 gamma-band.

Dates and versions

in2p3-00761772 , version 1 (06-12-2012)

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Cite

T. Shimoda, K. Tajiri, A. Odahara, M. Suga, N. Hamatani, et al.. Structure of Mg Isotope Studied by beta-Decay Spectroscopy of Spin-Polarized Na Isotopes. Frontier Issues in Physics of Exotic Nuclei : Proceedings of the Yukawa International Seminar 2011 (YKIS2011) and Long-Term Workshop on Dynamics and Correlations in Exotic Nuclei (DCEN2011), 2011, Kyoto, Japan. pp.310-315, ⟨10.1143/PTPS.196.310⟩. ⟨in2p3-00761772⟩
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