环面共振:与俾格米模、涡旋性质和反常形变分裂的关系
Toroidal resonance: relation to pygmy mode, vortical properties and anomalous deformation splitting
摘要:
本文综述了等幅环形偶极共振(TDR)研究的最新进展。分析了TDR与低能偶极强度(也称为侏儒共振)的可能关系。结果表明,在俾格米区的偶极强度可以理解为集体涡环运动在核表面的局部表现。应用TDR作为核偶极涡度的措施进行了讨论。最后,一个异常分裂的TDR变形核进行了仔细检查。
英文摘要:
We review a recent progress in investigation of the isoscalar toroidal dipole resonance (TDR). A possible relation of the TDR and low-energy dipole strength (also called a pygmy resonance) is analyzed. It is shown that the dipole strength in the pygmy region can by understood as a local manifestation of the collective vortical toroidal motion at the nuclear surface. Application of the TDR as a measure of the nuclear dipole vorticity is discussed. Finally, an anomalous splitting of the TDR in deformed nuclei is scrutinized.
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