Threshold Effects in Multi-channel Coupling and Spectroscopic Factors in Exotic Nuclei

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dc.creatorMichel, N.
dc.creatorNazarewicz, W.
dc.creatorPloszajczak, M.
dc.date2007-02-07
dc.date2007-02-08
dc.date.accessioned2026-07-07T11:03:30Z
dc.date.available2026-07-07T11:03:30Z
dc.descriptionIn the threshold region, the cross section and the associated overlap integral obey the Wigner threshold law that results in the Wigner-cusp phenomenon. Due to flux conservation, a cusp anomaly in one channel manifests itself in other open channels, even if their respective thresholds appear at a different energy. The shape of a threshold cusp depends on the orbital angular momentum of a scattered particle; hence, studies of Wigner anomalies in weakly bound nuclei with several low-lying thresholds can provide valuable spectroscopic information. In this work, we investigate the threshold behavior of spectroscopic factors in neutron-rich drip-line nuclei using the Gamow Shell Model, which takes into account many-body correlations and the continuum effects. The presence of threshold anomalies is demonstrated and the implications for spectroscopic factors are discussed.
dc.descriptionAccepted in Physical Review C Figure corrected
dc.identifierhttps://arxiv.org/abs/nucl-th/0702021
dc.identifierhttp://arxiv.org/abs/nucl-th/0702021
dc.identifierPhys.Rev.C75:031301,2007
dc.identifierdoi:10.1103/PhysRevC.75.031301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/188614
dc.subjectNuclear Theory
dc.titleThreshold Effects in Multi-channel Coupling and Spectroscopic Factors in Exotic Nuclei
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