Isospin structure of one- and two-phonon GDR excitations

Details Isospin structure of one- and two-phonon GDR excitations Isospin structure of one- and two-phonon GDR excitations

1998-12-02

arxiv.org/abs/nucl-th/9812008v1

Phys.Rev. C59 (1999) 3093-3098

Physics

Nuclear Physics

Nuclear Theory

8 pages, 2 figures

Scientific paper

10.1103/PhysRevC.59.3093

Isospin is included in the description of Coulomb excitation of multiple giant isovector dipole resonances. In the excitation of even-even nuclei, a relevant portion of the excitation strength is shown to be associated with 1+ two-phonon states, which tends to be hindered or completely supressed in calculations in which the isospin degree of freedom is not considered. We find that the excitation cross sections is strongly dependent on the ground state isospin.

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