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arXiv 1909.00628nucl-th
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sd壳层中的有效相互作用

Effective interactions in the sd shell

Nadezda A. Smirnova, Bruce R. Barrett, Youngman Kim, Ik Jae Shin, Andrey M. Shirokov, Erdal Dikmen, Pieter Maris, James P. Vary

摘要:

我们进行定量研究的微观有效壳模型相互作用的价sd壳,从现代核子核子势,手性N3 LO,JISP 16和大田16,使用无芯壳模型波函数和Okubo-Lee-Suzuki变换。我们调查的现象学的普遍sd壳相互作用,USDB相比,这些相互作用的crack属性。理论结合能和低能谱的O同位素和选定的sd壳核,提出。我们的结论是,有一个显着的改善质量的有效相互作用时,它是来自大田16潜力。结果表明,它的质子-中子质心与USDB的结果一致。然后,我们提出了修改的大田16质心,以提供调整后的相互作用产生显着改善的协议与实验。应用自旋张量分解的两体有效相互作用,以提取更多的信息的质心的结构,并了解我们目前的理论近似所产生的缺陷的原因。讨论了三种核子力可能发挥的作用。

英文摘要:

We perform a quantitative study of the microscopic effective shell-model interactions in the valence sd shell, obtained from modern nucleon-nucleon potentials, chiral N3LO, JISP16 and Daejeon16, using No-Core Shell-Model wave functions and the Okubo-Lee-Suzuki transformation. We investigate the monopole properties of those interactions in comparison with the phenomenological universal sd-shell interaction, USDB. Theoretical binding energies and low-energy spectra of O isotopes and of selected sd-shell nuclei, are presented. We conclude that there is a noticeable improvement in the quality of the effective interaction when it is derived from the Daejeon16 potential. We show that its proton-neutron centroids are consistent with those from USDB. We then propose monopole modifications of the Daejeon16 centroids in order to provide an adjusted interaction yielding significantly improved agreement with the experiment. A spin-tensor decomposition of two-body effective interactions is applied in order to extract more information on the structure of the centroids and to understand the reason for deficiencies arising from our current theoretical approximations. The issue of the possible role of the three-nucleon forces is addressed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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