New parametrization for the nuclear covariant energy density functional with a point-coupling interaction
New parametrization for the nuclear covariant energy density functional with a point-coupling interaction
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DOI：
10.1103/physrevc.82.054319
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发表时间：
2010-02
影响因子：
3.1
通讯作者：
Pengwei Zhao;Zhipan Li;Jiangming Yao;Jie Meng
中科院分区：
文献类型：
--
作者：
Pengwei Zhao;Zhipan Li;Jiangming Yao;Jie Meng
通过拟合60个选定的球形核的可观测量，包括结合能、电荷半径和经验配对能隙，提出了具有非线性点耦合相互作用的核协变能量密度泛函的新参数化PC-PK 1。PC-PK 1的成功体现在对无限核物质和有限核（包括基态和低激发态）的描述上。特别是，PC-PK 1提供了一个很好的描述的结合能的沿着同位素或等渗链，这使得它可靠的应用在奇异核的同位旋依赖。PC-PK 1的预测能力也说明了核的低洼激发态在五维集体哈密顿量，其中的参数是由约束计算三轴形状。
A new parametrization PC-PK1 for the nuclear covariant energy density functional with nonlinear point-coupling interaction is proposed by fitting to observables of 60 selected spherical nuclei, including the binding energies, charge radii, and empirical pairing gaps. The success of PC-PK1 is illustrated in the description of infinite nuclear matter and finite nuclei including the ground-state and low-lying excited states. In particular, PC-PK1 provides a good description for the isospin dependence of binding energy along either the isotopic or the isotonic chain, which makes it reliable for application in exotic nuclei. The predictive power of PC-PK1 is also illustrated for the nuclear low-lying excitation states in a five-dimensional collective Hamiltonian in which the parameters are determined by constrained calculations for triaxial shapes.