Details

Autor(en) / Beteiligte

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

Titel

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

Ist Teil von

• Progress of theoretical physics. Supplement, 2012-01, Vol.196, p.310-315

Ort / Verlag

Oxford University Press

Erscheinungsjahr

2012

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• 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 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.