论文标题
对滴注线的钙同位素的壳模型研究
A shell-model study of calcium isotopes towards their drip line
论文作者
论文摘要
我们在本文中报告了一项关于核壳模型的研究，内容涉及钙同位素滴管线的位置。起点是考虑到近代到临时到领导顺序（N3LO）的Entem和Machleidt在手性扰动理论中产生的现实两体电位，以及在近代到领导的手性三体力（N2LO）的手性三体力（N2lo），其结构和低级常数具有两者的潜力。然后，我们构建了有效的单粒子能量和对对角线化壳型汉密尔顿的所需的残留相互作用。计算出的两种中子分离能与实验非常吻合，直到56CA为止，这是最重的同位素，其质量已被测量，并且直到70CA直到70CA才显示出任何两中性发射的迹象。我们讨论了选择模型空间在确定中子滴注线中的作用，以及结果对壳模量哈密顿的参数的依赖性。
We report in this paper a study in terms of the nuclear shell model about the location of the calcium isotopes drip line. The starting point is considering the realistic two-body potential derived by Entem and Machleidt within chiral perturbation theory at next-to-next-to-next-to-leading order (N3LO), as well as a chiral three-body force at next-to-next-to-leading order (N2LO) whose structure and low-energy constants are consistent with the two-body potential. Then we construct the effective single-particle energies and residual interaction needed to diagonalize the shell-model Hamiltonian. The calculated two-neutron separation energies agree nicely with experiment until 56Ca, which is the heaviest isotope whose mass has been measured, and do not show any sign of two-neutron emission until 70Ca. We discuss the role of the choice of the model space in determining the neutron drip line, and also the dependence of the results on the parameters of the shell-model Hamiltonian.
