论文标题
外来Na和Mg同位素的矩和半径
Moments and Radii of exotic Na and Mg isotopes
论文作者
论文摘要
将富含中子的中子和中子数n的富含外来的Na和Mg同位素的地下特性研究为dripline。在[Tsunoda，Otsuka，Takayanagi等人，Nature 587，66（2020）]中报道的具有有效的核子核子相互作用的壳型计算被扩展到可观察到的物品，例如磁偶极子和电力四倍的时刻，以及电荷和电荷和物质radii。发现与实验数据达成良好的协议，并显示出Dripline的预测。提出了提取蒙特卡洛壳模型本征状变形参数的处方，并使用获得的值来计算电荷和物质半径。这些半径从液滴模型中增加被描述为表面变形的后果以及PF壳中的中子激发或职业的增长，与上述参考资料中呈现的滴灌机制一致。 n = 20的中子皮肤厚度约为0.1 FM，可以将其与A1/3缩放中208pb的值进行比较。关于外来核31NA，讨论了中子皮肤厚度与电磁力矩的关系。
The ground-state properties of neutron-rich exotic Na and Mg isotopes with even numbers of neutrons, N, are studied up to driplines. The shell-model calculations with an ab initio effective nucleon-nucleon interaction reported in [Tsunoda, Otsuka, Takayanagi et al., Nature 587, 66 (2020)] are extended to observables such as magnetic dipole and electric quadrupole moments, and charge and matter radii. Good agreements with experimental data are found, and predictions are shown up to driplines. A prescription to extract the deformation parameters for the eigenstates of Monte Carlo Shell Model is presented, and the obtained values are used to calculate charge and matter radii. The increase of these radii from the Droplet model is described as the consequences of the varying deformation of the surface and the growing neutron excitations or occupations in the pf shell, consistently with the dripline mechanism presented in the above reference. The neutron skin thickness is shown to be about 0.1 fm for N=20, which can be compared to the value for 208Pb in an A1/3 scaling. The relation of the neutron skin thickness to the electromagnetic moments is discussed for an exotic nucleus, 31Na.
