Ground-state electric quadrupole moment of Al31
Ground-state electric quadrupole moment of Al31
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Al31的基态电四极矩
DOI：
10.1103/physrevc.79.027301
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发表时间：
2008
影响因子：
3.1
通讯作者：
J. Murata
中科院分区：
文献类型：
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作者：
D. Nagae;H. Ueno;D. Kameda;M. Takemura;K. Asahi;K. Takase;A. Yoshimi;T. Sugimoto;K. Shimada;T. Nagatomo;M. Uchida;T. Arai;T. Inoue;S. Kagami;N. Hatakeyama;H. Kawamura;K. Narita;J. Murata
这些同位素的能级降低了[3, 4]，B(E2)值显着增强了[5]，并且提出了变形的可能性。理论分析[6]讨论了从sd壳层到上pf壳层的2p-2h激发的重要性，并得出结论，sd正常和pf入侵者构型之间的振幅反转将导致结构变形。发生这种现象的原子核区域称为反转岛。在阐明反演的根本机制时，电磁矩的测量发挥了重要作用。例如，在一系列富中子Na同位素中，发现一旦进入反演岛，基态磁偶极矩μ和电四极矩Q[7, 8]就与传统的壳层模型预测有明显偏差[9]，表明μ和Q对核构型的变化很敏感[10]。此外，在最近对 Mg 同位素的研究中，通过 µ 矩测量揭示了异常基态特性 [11, 12]。在目前的工作中，基态 Q 矩为
levels are lowered [3, 4] and theirB(E2) values are enhanced [5] sizably in these isotopes,and the possibility of deformation has been proposed.Theoretical analyses [6] discussed the importance of 2p-2h excitations from the sd shell to the upper pf shell,and concluded it plausible that an inversion of ampli-tudes between the sd normal and pf intruder configura-tions would lead to deformation of the ground states.The region of nuclei where such a phenomenon occurs iscalled the island of inversion. In elucidating the under-lying mechanism for the inversion, the measurements ofthe electromagnetic moments have played an importantrole. For example in a series of neutron-rich Na isotopes,it has been found that, once entering the island of in-version, the ground-state magnetic dipole moment µ andelectric quadrupole moment Q [7, 8] show clear devia-tions from the conventional shell-model predictions [9],indicating that µ and Q are sensitive to changes in thenuclear configuration [10]. Also in the recent study of Mgisotopes, anomalous ground-state properties have beenrevealed through the µ-moment measurements [11, 12].In the present work, the ground-state Q moment of
外来 Na 同位素中入侵基态的开始和 N=20 壳层间隙的演化
DOI：
--
发表时间：
2004
期刊：
Physical Review C Vo1.70 No.4
影响因子：
--
作者：
G.Neyens et al.;P.Mason et al.;T.Shizuma et al.;Y.Utsuno;Y.Utsuno et al.
通讯作者：
Y.Utsuno et al.