Burrello, S. and Colonna, M. (2024) Connecting low-lying dipole modes to nuclear structure and equation of state. Il nuovo cimento C, 47 (2). pp. 1-7. ISSN 1826-9885
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Abstract
We review some recent studies devoted to shed light on the prop- erties of low-lying dipole modes in nuclei, particularly exploring how their features are connected to nuclear structure properties, also providing valuable information on the nuclear matter equation of state (EOS). We perform time-dependent mean- field calculations, in the small-amplitude limit, to investigate dipole excitations in several nuclei. Employing standard Skyrme-like energy density functionals (EDFs), we show how the relative weight of the excitations emerging in the low-energy region evolves with nuclear global features, such as density profile and nuclear surface, re- flecting in turn important properties of the effective interaction and EOS. Moreover, we suggest a novel interpretation of the nature of the Pygmy Dipole Resonance and of its correlation with the neutron skin thickness in neutron-rich nuclei. Within the framework of the modern density functional theory, we also discuss recent devel- opments introduced to refine the EDF approaches in the low-density regime. On the one hand, by considering new class of EDFs, inspired by effective field theory and benchmarked on ab-initio calculations, which were recently devised to improve the description of neutron matter and to provide a more refined description of the surface in finite systems. On the other hand, by possibly extending the EDFs by accounting for the existence of many-body correlations and clustering phenomena.
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 20 May 2024 14:27 |
| Last Modified: | 20 May 2024 14:27 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/22919 |
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