Interfering doorway states and giant resonances. I. Resonance spectrum and multipole strengths
- Budker Institute of Nuclear Physics, 630090 Novosibirsk (Russia)
- Forschungszentrum Rossendorf, Institut fuer Kern- und Hadronenphysik, D-01314 Dresden (Germany)
- Technische Universitaet Dresden, Institut fuer Theoretische Physik, D-01062 Dresden (Germany)
- Centro Internacional de Ciencias, Cuernavaca (Mexico)
A phenomenological schematic model of multipole giant resonances (GR{close_quote}s) is considered which treats the external interaction via common decay channels on the same footing as the coherent part of the internal residual interaction. The damping due to the coupling to the sea of complicated states is neglected. As a result, the formation of GR is governed by the interplay and competition of two kinds of collectivity, the internal and the external one. The mixing of the doorway components of a GR due to the external interaction significantly influences their multipole strengths, widths, and positions in energy. In particular, a narrow resonance state with an appreciable multipole strength is formed when the doorway components strongly overlap. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 528184
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 2 Vol. 56; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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