Toroidal resonance: Relation to pygmy mode,vortical properties,and anomalous deformation splitting |
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| Authors: | V O Nesterenko J Kvasil A Repko W Kleinig P-G Reinhard |
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| Institution: | 1.Laboratory of Theoretical Physics,Joint Institute for Nuclear Research,Dubna,Russia;2.Institute of Particle and Nuclear Physics,CharlesUniversity,Prague,Czech Republic;3.Department of Nuclear Physics,Institute of Physics SAS,Bratislava,Slovakia;4.Institut für Theoretische Physik II,Universit?t Erlangen,Erlangen,Germany |
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| Abstract: | We review a recent progress in investigation of the isoscalar toroidal dipole resonance (TDR). A possible relation of the TDR and low-energy dipole excitations (also called a pygmy resonance) is analyzed. It is shown that the dipole strength in the pygmy region can be understood as a local manifestation of the collective vortical toroidalmotion at the nuclear surface. Application of the TDR as a measure of the nuclear dipole vorticity is discussed. An anomalous splitting of the TDR in deformed nuclei is inspected. |
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