Constraints on the symmetry energy and neutron skins from pygmy resonances in {sup 68}Ni and {sup 132}Sn

Journal Article · Thu Apr 15 04:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.041301· OSTI ID:21388897

Carbone, Andrea ^[1]; Colo, Gianluca; Bracco, Angela; Bortignon, Pier Francesco; Camera, Franco ^[1]; Ligang, Cao ^[1]; Wieland, Oliver ^[2]

---

1. Dipartimento di Fisica, Universita degli Studi di Milano, via Celoria 16, I-20133 Milano (Italy)
2. INFN, Sezione di Milano, via Celoria 16, I-20133 Milano (Italy)

Correlations between the behavior of the nuclear symmetry energy, the neutron skins, and the percentage of energy-weighted sum rule (EWSR) exhausted by the pygmy dipole resonance (PDR) in {sup 68}Ni and {sup 132}Sn are investigated by using different random phase approximation (RPA) models for the dipole response, based on a representative set of Skyrme effective forces plus meson-exchange effective Lagrangians. A comparison with the experimental data has allowed us to constrain the value of the derivative of the symmetry energy at saturation. The neutron skin radius is deduced under this constraint.

• OSTI ID: 21388897
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 81; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
APPROXIMATIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BOSON-EXCHANGE MODELS
CALCULATION METHODS
COMPARATIVE EVALUATIONS
CORRELATIONS
DIPOLES
ELEMENTARY PARTICLES
EQUATIONS
EVALUATION
EVEN-EVEN NUCLEI
FERMIONS
FUNCTIONS
HADRONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LAGRANGIAN FUNCTION
MATHEMATICAL MODELS
MULTIPOLES
NEUTRONS
NICKEL 68
NICKEL ISOTOPES
NUCLEI
NUCLEON-NUCLEON POTENTIAL
NUCLEONS
PARTICLE MODELS
PERIPHERAL MODELS
POTENTIALS
RADIOISOTOPES
RANDOM PHASE APPROXIMATION
RESONANCE
SATURATION
SECONDS LIVING RADIOISOTOPES
SKYRME POTENTIAL
SUM RULES
SYMMETRY
TIN 132
TIN ISOTOPES