Excited intruder states in (32)Mg
Excited intruder states in (32)Mg
复制标题
(32)Mg 中的兴奋入侵者态
DOI：
10.1103/physrevc.77.034310
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发表时间：
2008
影响因子：
3.1
通讯作者：
T. Otsuka
中科院分区：
文献类型：
--
作者：
V. Tripathi;S. Tabor;P. Bender;C. Hoffman;Sangjin Lee;K. Pepper;M. Perry;P. Mantica;J. Cook;J. Pereira;J. Pinter;J. Stoker;D. Weisshaar;Y. Utsuno;T. Otsuka
报道了用β延迟γ谱测量N = 2032 Mg的低能结构。发现~（32）Mg的能级结构完全由侵入子控制。在负宇称态中观察到1 p-1h和3 p-3 h态之间的反转，类似于在这些N20核中正宇称态的0 p-0 h和2 p-2 h反转。用Monte Carlo壳层模型计算合理地解释了正宇称和负宇称的入侵者激发态，表明随着Z的减小，N = 20的壳层间隙逐渐缩小。
The low energy level structure of N = 20 32 Mg obtained via β-delayed γ spectroscopy is reported. The level structure of 32 Mg is found to be completely dominated by intruders. An inversion between the 1p-1h and 3p-3h states is observed for the negative parity states, similar to the 0p-0h and 2p-2h inversion for the positive parity states in these N ∼ 20 nuclei. The intruder excited states, both positive and negative parity, are reasonably explained by Monte Carlo shell model calculations, which suggest a shrinking N = 20 shell gap with decreasing Z.