Finite Nuclei in the Quark-Meson Coupling Model

Abstract

International audienceWe report the first use of the effective quark-meson coupling (QMC) energy density functional (EDF), derived from a quark model of hadron structure, to study a broad range of ground state properties of even-even nuclei across the periodic table in the nonrelativistic Hartree-Fock þ BCS framework. The novelty of the QMC model is that the nuclear medium effects are treated through modification of the internal structure of the nucleon. The density dependence is microscopically derived and the spin-orbit term arises naturally. The QMC EDF depends on a single set of four adjustable parameters having a clear physics basis. When applied to diverse ground state data the QMC EDF already produces, in its present simple form, overall agreement with experiment of a quality comparable to a representative Skyrme EDF. There exist, however, multiple Skyrme parameter sets, frequently tailored to describe selected nuclear phenomena. The QMC EDF set of fewer parameters, derived in this work, is not open to such variation, chosen set being applied, without adjustment, to both the properties of finite nuclei and nuclear matter

Vlasov formalism for extended relativistic mean field models: The crust-core transition and the stellar matter equation of state

“…However, the incompressibility of these models is within the range 250 < K < 315 MeV predicted in Ref. [69,70]. Therefore, we consider that the K constraint is satisfied.…”

“…[55], except the one in K τ , the constraints from neutron matter calculations and those from Refs. [69,70]. Models NL3ωρ6 and NL3σρ6 only fail the flow and KaoS experiments.…”

“…[55], the ones from Refs. [69,70], the microscopic neutron matter calculations [33,34], and the 2M observational constraint [39,40]. We note that the Z271σρ5-6 models fail this last constraint; however, by using the procedure of Ref.…”

Superheavy Nuclei in the Quark-Meson-Coupling Model

“…These results illustrate a rather dramatic change from a significant underbinding, yielded by the mean field model with the Skyrme SVmin parameter set [23] and, to a lesser extent, predicted by QMC-without-pion model in the Z=100 -104 region [5], to a slight overbinding with the present QMCπ, microcroscopic-macroscopic models Finite-Range-Droplet-Model (FRDM) [18] and of Muntian et al (MM) [20,21]. It is interesting to observe that the inclusion of pion-exchange in the QMC model has a significant effect on the ground state binding energies.…”

Dynamical effects in fusion with exotic nuclei

“…For instance, reactions with the Gogny interaction have recently been performed [110]. The use of effective interactions from the quark-meson coupling model has also shown promising results in static HF calculations of nuclear structure [111] and could be implemented in TDHF codes.…”