A nuclear structure model based on linear response theory (i.e., random phase approximation) and which includes pairing correlations and anharmonicities (coupling with collective vibrations), has been implemented in such a way that it can be applied on the same footing to magic as well as open-shell nuclei. As applications, we have chosen to study the dipole excitations both in well known, stable isotopes like 208Pb and 120Sn as well as in the neutron-rich, unstable 132Sn nucleus, by addressing in the latter case the question about the nature of the low-lying strength. Our results suggest that the model is reliable and predicts in all cases low-lying strength of non collective nature.
Dipole states in stable and unstable nuclei / D. Sarchi, P.F. Bortignon, G. Colò. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 601:1/2(2004 Nov 04), pp. 27-33.
Titolo: | Dipole states in stable and unstable nuclei |
Autori: | BORTIGNON, PIER FRANCESCO (Secondo) COLO', GIANLUCA (Ultimo) |
Parole Chiave: | Giant resonances ; Hartree-Fock ; randon phase approximation |
Settore Scientifico Disciplinare: | Settore FIS/04 - Fisica Nucleare e Subnucleare |
Data di pubblicazione: | 4-nov-2004 |
Rivista: | |
Tipologia: | Article (author) |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.physletb.2004.09.019 |
Appare nelle tipologie: | 01 - Articolo su periodico |