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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:08 |
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Conference: Bucharest University Faculty of Physics 2013 Meeting
Section: Theoretical Physics and Applied Mathematics
Title:
Neutrons skin, dipole polarizabilities and pygmy resonance: correlations and symmetry energy effects
Authors:
V. Baran (1), Maria Colonna (2), M. Di Toro (2), Andreea Croitoru (3), D. Dumitru (4)
Affiliation:
1. University of Bucharest,Faculty of Physics, P.O.BOX MG-11, Magurele, Bucharest,Romania
2. Laboratori Nazionali del Sud, INFN, Catania, Italy
3. Research Center "Theoretical Physics", Faculty of Physics, University of Bucharest
4.Doctoral School, Faculty of Physics, University of Bucharest
E-mail
virbaran@yahoo.com
Keywords:
Landau-Vlasov kinetic equation, neutron skin, dipole polarizability, pygmy dipole resonance
Abstract:
The sensitivity of neutrons skin and dipole polarizability to the density dependence of symmetry energy is analyzed within microscopic transport model. For all studied systems we identify a collective component in dipolar response, well below Giant Dipole Resonance region. Based on these results a parameterization with mass for the energy centroid of collective part of Pygmy Dipole Resonance is deduced which can be useful for further experiments searching for this, quite elusive, mode. We estimate the energy weighted sum-rule exhausted by pygmy resonance and a clear correlation with the neutron skin size results. We conclude that systematic experimental investigations of pygmy dipole features may provide realistic constraints on the neutron skin properties and on the symmetry energy behavior below saturation.
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