Excitation spectra of the heaviest carbon isotopes investigated within the CD-Bonn Gamow shell model
Excitation spectra of the heaviest carbon isotopes investigated within the CD-Bonn Gamow shell model
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DOI：
10.1103/physrevc.106.024304
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发表时间：
2022-08
影响因子：
3.1
通讯作者：
Y. Geng;J. G. Li;Y. Z. Ma;B. Hu;Q. Wu;Z. Sun;Shengyao Zhang;F. Xu
中科院分区：
文献类型：
--
作者：
Y. Geng;J. G. Li;Y. Z. Ma;B. Hu;Q. Wu;Z. Sun;Shengyao Zhang;F. Xu
在基于真实核力的Gamow壳层模型(GSM)中对富中子碳同位素进行了研究，并选择该模型作为壳层模型的核心。通过使用复动量Berggren表示，很好地考虑了耦合对连续统的影响，该表象平等地处理束缚态、共振态和连续态。利用多体微扰理论中的盒折叠图法，从CD-Bonn相互作用出发，推导出了复杂的GSM有效相互作用。我们发现，在计算中包含连续介质耦合对于描述富中子碳同位素，特别是在再现和的实验基态方面是很重要的。我们的计算表明，碳链中的壳层关闭，而存在于下一个氧同位素偶数链中的壳层消失。计算表明，这是最重的结合碳同位素，即中子滴线。
Neutron-rich carbon isotopes have been investigated within the Gamow shell model (GSM) based on a realistic nuclear force.was chosen as the core in the shell-model calculations of the neutron-rich carbon isotopes. The effect from the coupling to the continuum is well considered by using the complex-momentum Berggren representation which treats bound, resonant, and continuum states on an equal footing. Using the many-body perturbation theory named the-box folded-diagram method, the complex GSM effective interaction was derived from the CD-Bonn interaction. We find that the inclusion of the continuum coupling in the calculation is important in the description of neutron-rich carbon isotopes, especially in reproducing the experimentalground states ofand. Our calculation indicates a shell closure atin the carbon chain, while theshell, which exists in the next even-chain of oxygen isotopes, disappears. The calculation suggests thatis the heaviest bound carbon isotope, i.e., the neutron drip line.