Searching for single-particle resonances with the Green's function method

• 作者: Ya-Tian Wang Ting-Ting Sun
• 来源期刊: 核技术（英文版）
• 年，卷（期）: 2021,（5）
• 所属期刊栏目: ACCELERATOR, RAY TECHNOLOGY AND APPLICATIONS
• 页码范围: 24-32
• 页数: 9页
• 语种: 英文

摘要

Single-particle resonances in the continuum are crucial for studies of exotic nuclei. In this study, the Green's function approach is employed to search for sin-gle-particle resonances based on the relativistic-mean-field model. Taking 120Sn as an example, we identify single-particle resonances and determine the energies and widths directly by probing the extrema of the Green's functions. In contrast to the results found by exploring for the extremum of the density of states proposed in our recent study [Chin. Phys. C, 44:084105 (2020)], which has proven to be very successful, the same resonances as well as very close energies and widths are obtained. By comparing the Green's functions plotted in different coordinate space sizes, we also found that the results very slightly depend on the space size. These findings demonstrate that the approach by exploring for the extremum of the Green's function is also very reliable and effective for identifying resonant states, regardless of whether they are wide or narrow.