标题： 一种双簇方法研究一中子晕和两中子晕核的性质 显示英文标题

标题： A two-cluster approach to the properties of one- and two-neutron-halo nuclei

摘要： 在这项工作中，我们提出了一种新的近似方法，用于获得具有中子晕的奇异核基态的简单波函数和有效算符。 我们将核心和晕视为双簇模型中的惰性物体。 相对波函数是简谐振子状态的组合，其尺寸由核半径与分离能之间的关系确定。 由于这些波函数缺乏预期的指数衰减，我们对算符的径向部分进行了乘法归一化，该归一化由核均方根半径确定。 然后将这种振子波函数和归一化后的算符结合用于计算几个$1n$和$2n$晕核的$dB(E1,\varepsilon)/d\varepsilon$电偶极强度分布。 通过拟合一个自由参数，结果与现有的实验数据表现出良好的一致性。 显示英文摘要

摘要： In this work, we present a new approximate method for obtaining simple wave functions and effective operators for the ground state of exotic nuclei with a neutron halo. We treat the core and halo as inert objects in a two-cluster model. The relative wave function is a combination of simple harmonic oscillator states with a size that is determined from a relation between the nuclear radius and separation energy. Since these wave functions lack the expected exponential decay, we apply a multiplicative renormalization to the radial part of the operators, determined from the nuclear root-mean-square radius. This combination of oscillator wavefunctions and renormalized operators is then applied to the calculation of dipole strength distributions $dB(E1,\varepsilon)/d\varepsilon$ for several $1n$- and $2n$-halo nuclei. By fitting a single free parameter, the results show excellent agreement with the available experimental data.