Structure of mg isotope studied by β-decay spectroscopy of spin-polarized na isotopes: Shape coexistence in 30mg

Tadashi Shimoda, Kunihiko Tajiri, Atsuko Odahara, Masaki Suga, Noriaki Hamatani, Hiroki Nishibata, Jun Takatsu, Rin Yokoyama, Yoshikazu Hirayama, Nobuaki Imai, Hiroari Miyatake, Mathew Pearson, C. D.P. Levy, K. P. Jackson, Romain Leguillon, Costel Petrache

研究成果: ジャーナルへの寄稿学術誌査読

1 被引用数 (Scopus)

抄録

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 30Na→30Mg. From the detailed decay scheme of 30Na, it is suggested that the 30Mg 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.

本文言語英語
ページ(範囲)310-315
ページ数6
ジャーナルProgress of Theoretical Physics Supplement
196
DOI
出版ステータス出版済み - 2012
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学(その他)

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