Green’s function method for single-particle resonant states in relativistic mean field theory
Green’s function method for single-particle resonant states in relativistic mean field theory
复制标题
相对论平均场理论中单粒子共振态的格林函数方法
DOI：
10.1103/physrevc.90.054321
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发表时间：
2014
影响因子：
3.1
通讯作者：
J. Meng
中科院分区：
文献类型：
--
作者：
T. T. Sun;S. Q. Zhang;Y. Zhang;J. N. Hu;J. Meng
在坐标空间中，用绿色函数方法建立了相对论平均场理论，将单粒子束缚态和共振态放在同一个基础上研究。以自由粒子的态密度为参考，从态密度中提取了单粒子共振态的能量和宽度，没有任何歧义。作为一个例子，将计算结果与散射相移法、耦合常数解析延拓法、真实的稳定化法和复标度法进行了比较。与这些方法的单中子共振态的能量和宽度发现很好的协议。
Relativistic mean field theory is formulated with the Green's function method in coordinate space to investigate the single-particle bound states and resonant states on the same footing. Taking the density of states for free particles as a reference, the energies and widths of single-particle resonant states are extracted from the density of states without any ambiguity. As an example, the energies and widths for single-neutron resonant states inare compared with those obtained by the scattering phase-shift method, the analytic continuation in the coupling constant approach, the real stabilization method, and the complex scaling method. Excellent agreements with these methods are found for the energies and widths of single-neutron resonant states.