论文标题
$^{208} $ pb的属性从状态的相对论方程式中预测
Properties of $^{208}$Pb predicted from the relativistic equation of state in the full Dirac space
论文作者
论文摘要
相对论的Brueckner-Hartree-fock（RBHF）理论在整个DIRAC空间中允许人们独特地确定单粒子电位的标量和矢量成分的动量依赖性。为了将这种新方法从核物质扩展到有限的核，作为第一步，通过使用不对称核物质和液态液滴模型的微观状态方程来探索$^{208} $ pb的性质。计算中子和质子密度分布，结合能，中子和质子半径以及$^{208} $ pb中的中子皮肤厚度。为了进一步比较RBHF理论在完整狄拉克空间中预测的电荷密度与实验电荷密度，使用相移分析方法获得了弹性电子核螺旋散射中的差分横截面和电荷形式。 RBHF理论的结果与实验数据非常吻合。此外，还讨论了液滴模型中表面项参数$ f_0 $的变化产生的不确定性。
Relativistic Brueckner-Hartree-Fock (RBHF) theory in the full Dirac space allows one to determine uniquely the momentum dependence of scalar and vector components of the single-particle potentials. In order to extend this new method from nuclear matter to finite nuclei, as a first step, properties of $^{208}$Pb are explored by using the microscopic equation of state for asymmetric nuclear matter and a liquid droplet model. The neutron and proton density distributions, the binding energies, the neutron and proton radii, and the neutron skin thickness in $^{208}$Pb are calculated. In order to further compare the charge densities predicted from the RBHF theory in the full Dirac space with the experimental charge densities, the differential cross sections and the electric charge form factors in the elastic electron-nucleus scattering are obtained by using the phase-shift analysis method. The results from the RBHF theory are in good agreement with the experimental data. In addition, the uncertainty arising from variations of the surface term parameter $f_0$ in the liquid droplet model is also discussed.
