Core Excited Fano-Resonances in Exotic Nuclei

Details Core Excited Fano-Resonances in Exotic Nuclei Core Excited Fano-Resonances in Exotic Nuclei

2006-03-07

arxiv.org/abs/nucl-th/0603019v1

Phys.Lett. B633 (2006) 469-473

Physics

Nuclear Physics

Nuclear Theory

11 pages, 1 figure

Scientific paper

10.1016/j.physletb.2005.12.046

Fano-resonances are investigated as a new continuum excitation mode in exotic nuclei. By theoretical model calculations we show that the coupling of a single particle elastic channel to closed core-excited channels leads to sharp resonances in the low-energy continuum. A signature for such bound states embedded in the continuum (BSEC) are characteristic interference effects leading to asymmetric line shapes. Following the quasiparticle-core coupling model we consider the coupling of 1-QP (one-quasiparticle) and 3-QP components and find a number of long-living resonance structures close to the particle threshold. Results for 15C are compared with experimental data, showing that the experimentally observed spectral distribution and the interference pattern are in qualitative agreement with a BSEC interpretation.

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