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|
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|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.physletb.2004.09.019|
|Appare nelle tipologie:||01 - Articolo su periodico|