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arXiv 2010.02438nucl-th
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重核系统的Daejeon16相互作用与接触项修正

Daejeon16 interaction with contact-term corrections for heavy nuclear systems

Panagiota Papakonstantinou, James P. Vary, Youngman Kim

摘要:

在平均场近似下,大田16号核的两核子相互作用被用于多体方法。大田16的微扰字符验证16 O从Hartree-Fock(HF)近似和从无核壳模型的结果进行比较,并通过检查微扰修正的大小,在轻,重核的HF能量。为了近似地描述整个核图的能量和半径,引入了一个2 + 3核子接触相互作用的唯象修正。与拟合参数,我们实现了一个很好的描述中等质量的核的能量和大小方面,也在质心能量的巨共振和偶极极化率内计算的随机相位近似(RPA)。我们的研究结果提供了进一步的理由,使用大田16增强与现象学的修正作为一个有效的相互作用的微扰字符在各种应用程序。

英文摘要:

The Daejeon16 two-nucleon interaction is employed in many-body approaches based on the mean-field approximation. The perturbative character of Daejeon16 is verified by comparing results for 16O from the Hartree-Fock (HF) approximation and from the no-core shell model and by examining the magnitude of perturbative corrections to the HF energy in light and heavy nuclei. In order to approximately describe energies and radii across the nuclear chart, a phenomenological correction in the form of a two-plus-three-nucleon contact interaction is introduced. With fitted parameters we achieve a very good description of medium-mass nuclei in terms of energy and size and also in terms of the centroid energy of the giant monopole resonance and the dipole polarizability calculated within the random-phase approximation (RPA). Our results provide further justification for the use of Daejeon16 augmented with phenomenological corrections as an effective interaction of perturbative character in a variety of applications.

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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