Interactions effectives, théories de champ moyen, masses et rayons nucléaires

Meyer, Jürgen

doi:10.1051/anphys:2003006

Cited by 15 publications

(14 citation statements)

References 239 publications

(487 reference statements)

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“…For small asymmetries, a roughly quadratic law is observed. Interestingly, the line is convex around zero asymmetry, implying, in a liquid-drop picture, a positive surface-symmetry coefficient, in qualitative agreement with certain calculations in semi-infinite matter [44], but in contrast with many evaluations from the literature [45,46], including ones based on the SLy4 interaction [34]. Our result, which we found quite robust with respect to approximations involved (for example, the use of LDA instead of Hartree-Fock energies), warrants further investigations in the future.…”

Section: Surface Energysupporting

confidence: 87%

Densities and energies of nuclei in dilute matter at zero temperature

et al. 2013

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20 pages, incl. 12 figuresWe explore the ground-state properties of nuclear clusters embedded in a gas of nucleons with the help of Skyrme-Hartree-Fock microscopic calculations. Two alternative representations of clusters are introduced, namely coordinate-space and energy-space clusters. We parameterize their density profiles in spherical symmetry in terms of basic properties of the energy density functionals used and propose an analytical, Woods-Saxon density profile whose parameters depend, not only on the composition of the cluster, but also of the nucleon gas. We study the clusters' energies with the help of the local-density approximation, validated through our microscopic results. We find that the volume energies of coordinate-space clusters are determined by the saturation properties of matter, while the surface energies are strongly affected by the presence of the gas. We conclude that both the density profiles and the cluster energies are strongly affected by the gas and discuss implications for the nuclear EoS and related perspectives. Our study provides a simple, but microscopically motivated modeling of the energetics of clusterized matter at subsaturation densities, for direct use in consequential applications of astrophysical interest

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Section: Surface Energysupporting

confidence: 87%

Densities and energies of nuclei in dilute matter at zero temperature

et al. 2013

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“…In the same table we compare nuclear matter properties at the saturation point for the new SLy5* and the original SLy5, showing that they all are essentially equals but the Thomas-Reiche-Kuhn enhancement factor κ v which is larger with SLy5*. The value obtained with SLy5* is in agreement with the empirical value [20] Table 1: Parameters of the Skyrme functionals used in the article. In the last lines we give the main SNM properties around saturation for these functionals: binding energy per nucleon E/A, saturation density ρ sat , isoscalar effective mass m * /m, incompressibility K ∞ , symmetry energy coefficient a I and the Thomas-Reiche-Kuhn enhancement factor κ v .…”

Section: Resultssupporting

confidence: 66%

Fitting Skyrme functionals using linear response theory

et al. 2013

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Recently, it has been recently shown that the linear response theory in symmetric nuclear matter can be used as a tool to detect finite size instabilities for different Skyrme functionals [1,2]. In particular it has been shown that there is a correlation between the density at which instabilities occur in infinite matter and the instabilities in finite nuclei.In this article we present a new fitting protocol that uses this correlation to add new additional constraint in Symmetric Infinite Nuclear Matter in order to ensure the stability of finite nuclei against matter fluctuation in all spin and isospin channels. As an application, we give the parameters set for a new Skyrme functional which includes central and spin-orbit parts and which is free from instabilities by construction.

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“…This effective approach relies on a limited number of universal parameters, usually fitted on experimental data (observables) [3,4] along with properties of infinite nuclear matter (pseudo-observables) extracted from experimental results or derived from realistic models [5].…”

Section: Introductionmentioning

confidence: 99%