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arXiv 1706.06115nucl-thnucl-exphysics.atm-clus
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价轨道质子中子子系统的关联能

Correlation Energy of Proton-Neutron Subsystem in Valence Orbit

Tomohiro Oishi, Lorenzo Fortunato

摘要:

利用简单的三体模型计算了价质子-中子子系统的氘相关能。我们主要研究了$^6$ Li和$^{18}$ F核,假定它们是双闭核,具有价质子和中子。两个相互作用模型,示意密度依赖接触(SDDC)和明尼苏达势,被用来描述质子-中子相互作用。通过对DCE的评价,我们得出结论:在$^6$ Li中的质子-中子结合可以比真空中的氘核强。另一方面,在$^{18}$ F中,能量相关性非常弱,并且不利于束缚的类氘构型。这两个系统之间的显着差异可以理解从质子-中子动能和配对能量之间的竞争,这是敏感的波函数的空间扩展。这一结果表明,氘核关联与其所处的环境和价轨道有着显著的依赖关系。

英文摘要:

Deuteron correlation energy (DCE) of the valence proton-neutron subsystem is evaluated by utilizing a simple three-body model. We focus on the $^6$Li and $^{18}$F nuclei assuming the doubly-closed core and the valence proton and neutron. Two interaction models, schematic density-dependent contact (SDDC) and Minnesota potentials, are utilized to describe the proton-neutron interaction. Evaluating DCE, we conclude that the proton-neutron binding in $^6$Li can be stronger than its counterpart of a deuteron in vacuum. On the other hand, in $^{18}$F, the energetic correlation is remarkably weak, and does not favor the bound, deuteron-like configuration. This significant difference between two systems can be understood from a competition between the proton-neutron kinetic and pairing energies, which are sensitive to the spatial extension of the wave function. This result indicates a remarkable dependence of the deuteron correlation to its environment and the valence orbits.

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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