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Title: A new Skyrme energy density functional for a better description of spin-isospin resonances

A correct determination of the isospin and spin-isospin properties of the nuclear effective interaction should lead to an accurate description of the Gamow-Teller resonance (GT), the Spin Dipole Resonance (SDR), the Giant Dipole Resonance (GDR) or the Antianalog Giant Dipole Resonance (AGDR), among others. A new Skyrme energy density functional named SAMi is introduced with the aim of going a step forward in setting the bases for a more precise description of spin-isospin resonances [1, 2]. In addition, we will discuss some new features of our analysis on the AGDR in {sup 208}Pb [3] as compared with available experimental data on this resonance [4, 5, 6], and on the GDR [7]. Such study, guided by a simple yet physical pocket formula, has been developed by employing the so called SAMi-J family of systematically varied interactions. This set of interactions is compatible with experimental data for values of the symmetry energy at saturation J and slope parameter L falling in the ranges 31−33 MeV and 75−95 MeV, respectively.
Authors:
 [1] ;  [2] ;  [1] ;  [2] ;  [3] ;  [4] ;  [3] ;  [3] ;  [3] ;  [4] ;  [5] ;  [5]
  1. Dipartimento di Fisica, Università degli Studi di Milano, via Celoria 16, 20133 Milano (Italy)
  2. (INFN), Sez. di Milano, via Celoria 16, 20133 Milano (Italy)
  3. (China)
  4. Kavli Institute for Theoretical Physics China, CAS, Beijing 100190 (China)
  5. (Japan)
Publication Date:
OSTI Identifier:
22492465
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1681; Journal Issue: 1; Conference: Nuclear Structure and Dynamics '15: 3. international nuclear physics conference on nuclear structure and dynamics, Portoroz (Slovenia), 14-19 Jun 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPARATIVE EVALUATIONS; DIPOLES; ENERGY DENSITY; GAMOW-TELLER RULES; INTERACTIONS; ISOSPIN; LEAD 208; MEV RANGE 10-100; NUCLEAR MAGNETIC RESONANCE; SATURATION; SKYRME POTENTIAL; SPIN; SYMMETRY