论文标题
球形核中的核心肿胀：核密度饱和的指示
Core swelling in spherical nuclei: An indication of the saturation of nuclear density
论文作者
论文摘要
背景：核半径是原子核的最重要和最基本的特性之一，其进化与内部区域中核密度的饱和密切相关，但是对于中子富含中子的不稳定核的核半径的系统学并不众所周知。 目的：由最近的相互作用横截面测量的动机，表明中子富含Ca的Ca同位素的48CA核心肿胀，我们探索了球形核中中子半径和质子半径增强的机制。 方法：对于中子富含中子的CA，Ni和SN同位素，进行了三组Skyrme型有效相互作用的微观Hartree-fock计算。使用GLAUBER模型评估CA同位素的总反应横截面，以将其与最近的横截面数据进行比较。 结果：我们与测得的横截面和电荷半径获得了良好的一致性。各种“核心”构型的中子和质子半径是从完整的Hartree-Fock计算中提取的，并讨论了核心肿胀机制。 结论：核心肿胀现象发生取决于占用价单中子状态的特性，以最大程度地减少内部区域中密度饱和的能量损失，而内部区域的密度饱和，这似乎在光核中很突出，例如Ca同位素。
Background: Nuclear radius is one of the most important and basic properties of atomic nuclei and its evolution is closely related to the saturation of the nuclear density in the internal region but the systematics of the nuclear radii for the neutron-rich unstable nuclei is not well known. Purpose: Motivated by the recent interaction cross section measurement which indicates the 48Ca core swelling in the neutron-rich Ca isotopes, we explore the mechanism of the enhancement of the neutron and proton radii for spherical nuclei. Methods: Microscopic Hartree-Fock calculations with three sets of Skyrme-type effective interactions are performed for the neutron-rich Ca, Ni and Sn isotopes. The total reaction cross sections for the Ca isotopes are evaluated with the Glauber model to compare them with the recent cross section data. Results: We obtain good agreement with the measured cross sections and charge radii. The neutron and proton radii of the various "core" configurations are extracted from the full Hartree-Fock calculation and discuss the core swelling mechanism. Conclusions: The core swelling phenomena occur depending on the properties of the occupying valence single-neutron states to minimize the energy loss that comes from the saturation of the densities in the internal region, which appears to be prominent in light nuclei such as Ca isotopes.
