标题： 相对论随机相位近似中的环形偶极子共振 显示英文标题

标题： Toroidal dipole resonances in the relativistic random phase approximation

摘要： 球形核中的同位标旋转变矩偶极子强度分布是在完全一致的相对论随机相位近似框架中计算的。 最近观察到的“同位标偶极子模的低能成分”可能实际上对应于旋转变矩巨偶极子共振。 尽管几种理论模型都预测了旋转变矩共振的存在，但目前尚未在实验中得到确认。 旋转变矩共振与偶极压缩模之间的强混合可能有助于解释理论和实验在同位标巨偶极子共振位置上的巨大差异。 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. 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. The strong mixing between the toroidal resonance and the dipole compression mode might help to explain the large discrepancy between theory and experiment on the position of isoscalar giant dipole resonances.