Toroidal resonance: Relation to pygmy mode, vortical properties, and anomalous deformation splitting


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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.

作者简介

P.-G. Reinhard

Institut für Theoretische Physik II

Email: nester@theor.jinr.ru
德国, Erlangen

V. Nesterenko

Laboratory of Theoretical Physics

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Email: nester@theor.jinr.ru
俄罗斯联邦, Dubna

J. Kvasil

Institute of Particle and Nuclear Physics

Email: nester@theor.jinr.ru
捷克共和国, Prague

A. Repko

Department of Nuclear Physics

Email: nester@theor.jinr.ru
斯洛伐克, Bratislava

W. Kleinig

Laboratory of Theoretical Physics

Email: nester@theor.jinr.ru
俄罗斯联邦, Dubna

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