Interfering Doorway States and Giant Resonances. II: Transition Strengths

Details Interfering Doorway States and Giant Resonances. II: Transition Strengths Interfering Doorway States and Giant Resonances. II: Transition Strengths

1997-04-17

arxiv.org/abs/nucl-th/9704038v1

Phys.Rev.C56:1044-1056,1997

Physics

Nuclear Physics

Nuclear Theory

17 pages, LaTeX, 5 figures as JPEG, to appear in PRC (July 1997)

Scientific paper

10.1103/PhysRevC.56.1044

The mixing of the doorway components of a giant resonance (GR) due to the interaction via common decay channels influences significantly the distribution of the multipole strength and the energy spectrum of the decay products of the GR. The concept of the partial widths of a GR becomes ambiguous when the mixing is strong. In this case, the partial widths determined in terms of the $K$- and $S$-matrices must be distinguished. The photoemission turns out to be most sensitive to the overlapping of the doorway states. At high excitation energies, the interference between the doorway states leads to a restructuring towards lower energies and apparent quenching of the dipole strength.

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