Nuclear skin emergence in Skyrme deformed Hartree-Fock calculations

Sarriguren, P.; Gaidarov, M. K.; Guerra, E. Moya de; Antonov, A. N.

doi:10.1103/physrevc.76.044322

Cited by 75 publications

(123 citation statements)

References 73 publications

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“…As pointed out in Ref. [38], the RMF results for R systematically overestimate the Skyrme HF results. This is confirmed by the larger values of the neutron-skin thickness of 208 Pb obtained in Ref.…”

Section: Relationships For Calculations Of T -Dependent Symmetry Ementioning

confidence: 91%

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Temperature dependence of the symmetry energy and neutron skins in Ni, Sn, and Pb isotopic chains

et al. 2017

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The temperature dependence of the symmetry energy for isotopic chains of even-even Ni, Sn, and Pb nuclei is investigated in the framework of the local density approximation (LDA). The Skyrme energy density functional with two Skyrme-class effective interactions, SkM* and SLy4, is used in the calculations. The temperaturedependent proton and neutron densities are calculated through the HFBTHO code that solves the nuclear SkyrmeHartree-Fock-Bogoliubov problem by using the cylindrical transformed deformed harmonic-oscillator basis. In addition, two other density distributions of 208 Pb, namely the Fermi-type density determined within the extended Thomas-Fermi (TF) method and symmetrized-Fermi local density obtained within the rigorous density functional approach, are used. The kinetic energy densities are calculated either by the HFBTHO code or, for a comparison, by the extended TF method up to second order in temperature (with T 2 term). Alternative ways to calculate the symmetry energy coefficient within the LDA are proposed. The results for the thermal evolution of the symmetry energy coefficient in the interval T = 0-4 MeV show that its values decrease with temperature. The temperature dependence of the neutron and proton root-mean-square radii and corresponding neutron skin thickness is also investigated, showing that the effect of temperature leads mainly to a substantial increase of the neutron radii and skins, especially in the more neutron-rich nuclei, a feature that may have consequences on astrophysical processes and neutron stars.

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Section: Relationships For Calculations Of T -Dependent Symmetry Ementioning

confidence: 91%

“…[38] and references therein). The latter is commonly defined in terms of the difference between the neutron and proton root-mean-square (rms) radii and is found to be closely related to the density dependence of the NSE, with the EOS of pure neutron matter and properties of neutron stars [39][40][41][42][43][44][45][46].…”

Section: Introductionmentioning

confidence: 99%

Temperature dependence of the symmetry energy and neutron skins in Ni, Sn, and Pb isotopic chains

et al. 2017

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“…Neutron skin thickness is also deduced from other measurements such as antiprotonic atoms (open circles) [58], giant dipole resonance (GDR) (open triangles) [59], spin dipole resonance (SDR) (open and closed diamonds) [60,61], and proton elastic scattering (ES) (closed squares) [62,63]. The AMD results are compared with the results of relativistic mean-field (RMF) calculations with NL3 interaction (small filled dots, whose average trend is represented by the dotted line) [65], and of deformed Skyrme-HF (def-SHF) calculations with SLy4 force (small open dots, whose average trend is represented by the dashed line) [64].…”

Section: B Matter Radii Of Mg Isotopesmentioning

confidence: 99%

Ground-state properties of neutron-rich Mg isotopes

et al. 2014

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We analyze recently measured total reaction cross sections for [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] Mg isotopes incident on 12 C targets at 240 MeV/nucleon by using the folding model and antisymmetrized molecular dynamics (AMD). The folding model well reproduces the measured reaction cross sections, when the projectile densities are evaluated by the deformed Woods-Saxon (def-WS) model with AMD deformation. Matter radii of [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] Mg are then deduced from the measured reaction cross sections by fine tuning the parameters of the def-WS model. The deduced matter radii are largely enhanced by nuclear deformation. Fully microscopic AMD calculations with no free parameter well reproduce the deduced matter radii for [24][25][26][27][28][29][30][31][32][33][34][35][36] Mg, but still considerably underestimate them for 37,38 Mg. The large matter radii suggest that 37,38 Mg are candidates for deformed halo nucleus. AMD also reproduces other existing measured ground-state properties (spin parity, total binding energy, and one-neutron separation energy) of Mg isotopes. Neutron-number (N ) dependence of deformation parameter is predicted by AMD. Large deformation is seen from 31 Mg with N = 19 to a drip-line nucleus 40 Mg with N = 28, indicating that both the N = 20 and 28 magicities disappear. N dependence of neutron skin thickness is also predicted by AMD.

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“…In Ref. [19] we have studied a formation of a neutron skin in tin isotopes with smaller A where very poor experimental information is available. For instance, a large uncertainty is shown to exist experimentally in the neutron skin thickness of 124 Sn, i.e., its value varies from 0.1 to 0.3 fm depending on the experimental method.…”

Section: Results Of Calculations and Discussionmentioning

confidence: 99%

“…We choose some spherical medium and heavy Ni (A=74-84) and Sn (A=124-152) isotopes (considered also in Refs. [19,20]) because, first, they are primary candidates to be measured at the upcoming experimental facilities, and second, for them several predictions have been made concerning the nuclear skin emergence. In addition, we present some results for a chain of Pb (A=202-214) isotopes being inspired by the significant interest (in both experiment [21,22,23] and theory [24,25,26,27]) to study, in particular, the neutron distribution of 208 Pb and its rms radius.…”

Section: Introductionmentioning

confidence: 99%

Symmetry energy and surface properties of neutron-rich exotic nuclei

Gaidarov

Antonov

Sarriguren

et al. 2014

AIP Conference Proceedings

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Abstract. The symmetry energy, the neutron pressure and the asymmetric compressibility of spherical Ni, Sn, and Pb and deformed Kr and Sm neutron-rich even-even nuclei are calculated within the coherent density fluctuation model using the symmetry energy as a function of density within the Brueckner energy-density functional. The correlation between the thickness of the neutron skin and the characteristics related with the density dependence of the nuclear symmetry energy is investigated for isotopic chains of these nuclei in the framework of the deformed self-consistent mean-field Skyrme HF+BCS method. The mass dependence of the nuclear symmetry energy and the neutron skin thickness are also studied together with the role of the neutron-proton asymmetry. The studied correlations reveal a smoother behavior in the case of spherical nuclei than for deformed ones. We also notice that the neutron skin thickness obtained for 208 Pb with SLy4 force is found to be in a good agreement with the recent data. In addition to the interest that this study may have by itself, we give some numerical arguments in proof of the existence of peculiarities of the studied quantities in Ni and Sn isotopic chains that are not present in the Pb chain.

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Nuclear skin emergence in Skyrme deformed Hartree-Fock calculations

Cited by 75 publications

References 73 publications

Temperature dependence of the symmetry energy and neutron skins in Ni, Sn, and Pb isotopic chains

Temperature dependence of the symmetry energy and neutron skins in Ni, Sn, and Pb isotopic chains

Ground-state properties of neutron-rich Mg isotopes

Symmetry energy and surface properties of neutron-rich exotic nuclei

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