标题： 相对论随机相位近似中的环形二极辐射共振 显示英文标题

标题： Toroidal dipole resonances in the relativistic random phase approximation

摘要： 球形核的等标扭力偶极子强度分布是在一个完全一致的相对论随机相位近似框架中计算的，该框架基于具有非线性介子自相互作用项的有效平均场拉格朗日量。 建议最近观察到的“等标偶极子模的低能成分”实际上可能对应于扭力巨偶极子共振。 尽管几种理论模型都预测了扭力共振的存在，但目前尚未在实验中得到确认。 在当前的分析中，这些状态的涡旋动力学通过相应的速度场来展示。 显示英文摘要

摘要： The isoscalar toroidal dipole strength distributions in spherical nuclei are calculated in the framework of a fully consistent relativistic random phase approximation, based on effective mean-field Lagrangians with nonlinear meson self-interaction terms. It is suggested that the recently observed "low-lying component of the isoscalar dipole mode" might in fact correspond to the toroidal giant dipole resonance. Although predicted by several theoretical models, the existence of toroidal resonances has not yet been confirmed in experiment. In the present analysis the vortex dynamics of these states is displayed by the corresponding velocity fields.