Isoscalar giant resonances in the Sn nuclei and implications for the asymmetry term in the nuclear-matter incompressibility

2010/02/17 by T. Li, U. Garg, Y. Liu +23 · 7 citations
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #nucl-ex

paper · pdf · doi:10.1103/physrevc.81.034309

published as Phys.Rev.C81:034309,2010 · Accepted for publication in Physical Review C. Minor revisions in text and labeling of figures

arxiv created 2010/02/17 · openalex publication_date 2010/03/22 · arxiv updated 2010/04/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

We have investigated the isoscalar giant resonances in the Sn isotopes using inelastic scattering of 386-MeV \ensuremathα particles at extremely forward angles, including 0^\ifmmode^∘\else\textdegree\fi. We have obtained completely ``background-free'' inelastic-scattering spectra for the Sn isotopes over the angular range 0^\ifmmode^∘\else\textdegree\fi--9^\ifmmode^∘\else\textdegree\fi and up to an excitation energy of 31.5 MeV. The strength distributions for various multipoles were extracted by a multipole decomposition analysis based on the expected angular distributions of the respective multipoles. We find that the centroid energies of the isoscalar giant monopole resonance (ISGMR) in the Sn isotopes are significantly lower than the theoretical predictions. In addition, based on the ISGMR results, a value of K_\ensuremathτ=\ensuremath-550\ifmmode±\else\textpm\fi100 MeV is obtained for the asymmetry term in the nuclear incompressibility. Constraints on interactions employed in nuclear structure calculations are discussed on the basis of the experimentally obtained values for K_\ensuremath∞ and K_\ensuremathτ.

Citations

• A New Parameterization for the Lagrangian Density of Relativistic Mean Field Theory
• Neutron-Rich Nuclei and Neutron Stars: A New Accurately Calibrated Interaction for the Study of Neutron-Rich Matter

Cited by

• Extended Skyrme interactions for nuclear matter, finite nuclei, and neutron stars
• Effects of thermal shape fluctuations and pairing fluctuations on the giant dipole resonance in warm nuclei
• Differential analysis of incompressibility in neutron-rich nuclei
• Effect of pairing correlations on incompressibility and symmetry energy in nuclear matter and finite nuclei
• Temperature and density dependence of asymmetric nuclear matter and protoneutron star properties within an extended relativistic mean field model
• Further explorations of Skyrme-Hartree-Fock-Bogoliubov mass formulas. XII. Stiffness and stability of neutron-star matter
• Systematic study of giant quadrupole resonances with the subtracted second random-phase approximation: Beyond-mean-field centroids and fragmentation

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• Are There Nuclear Structure Effects on the Isoscalar Giant Monopole Resonance and Nuclear Incompressibility near A~90?
• Towards a Unified Description of Isoscalar Giant Monopole Resonances in a Self-Consistent Quasiparticle-Vibration Coupling Approach