Nuclear dipole polarizability from mean-field modeling constrained by chiral effective field theory
Nuclear dipole polarizability from mean-field modeling constrained by chiral effective field theory
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DOI：
10.1016/j.physletb.2017.12.012
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发表时间：
2017-03
影响因子：
4.4
通讯作者：
Zhen Zhang;Y. Lim;J. Holt;C. Ko
中科院分区：
文献类型：
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作者：
Zhen Zhang;Y. Lim;J. Holt;C. Ko
我们通过手性二体和三体力以及有限核的结合能拟合不对称核物质中的状态方程和核子有效质量，构造了一个新的 Skyrme 相互作用 Skχm⁎。利用这种相互作用研究随机相位近似下 48Ca、68Ni、120Sn 和 208Pb 的电偶极子极化率，我们发现理论预测与实验测量值非常吻合，无需对 Skyrme 相互作用进行额外的微调，从而证实了新的 Skyrme 相互作用在研究原子核性质中的有用性。我们进一步利用这种相互作用研究了48Ca和208Pb的中子皮厚度，发现它们与实验数据一致。
We construct a new Skyrme interaction Skχm⁎by fitting the equation of state and nucleon effective masses in asymmetric nuclear matter from chiral two- and three-body forces as well as the binding energies of finite nuclei. Employing this interaction to study the electric dipole polarizabilities of48Ca,68Ni,120Sn, and208Pb in the random-phase approximation, we find that the theoretical predictions are in good agreement with experimentally measured values without additional fine tuning of the Skyrme interaction, thus confirming the usefulness of the new Skyrme interaction in studying the properties of nuclei. We further use this interaction to study the neutron skin thicknesses of48Ca and208Pb, and they are found to be consistent with the experimental data.