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http://hdl.handle.net/2445/128277
Title: | Model dependence of the neutron-skin thickness on the symmetry energy |
Author: | Mondal, C. Agrawal, B. K. Centelles Aixalà, Mario Colò, G. Roca Maza, Xavier Paar, N. Viñas Gausí, Xavier Singh, S. K. Patra, S. K. |
Keywords: | Teoria del funcional de densitat Simetria (Física) Density functionals Symmetry (Physics) |
Issue Date: | 2-Jun-2016 |
Publisher: | American Physical Society |
Abstract: | The model dependence in the correlations of the neutron-skin thickness in heavy nuclei with various symmetry-energy parameters is analyzed by using several families of systematically varied microscopic mean-field models. Such correlations show a varying degree of model dependence once the results for all the different families are combined. Some mean-field models associated with similar values of the symmetry-energy slope parameter at saturation density L , and pertaining to different families, yield a greater-than-expected spread in the neutron-skin thickness of the 208 Pb nucleus. The effective value of the symmetry-energy slope parameter L eff , determined by using the nucleon density profiles of the finite nucleus and the density derivative S ′ ( ρ ) of the symmetry energy starting from about saturation density up to low densities typical of the surface of nuclei, seems to account for the spread in the neutron-skin thickness for the models with similar L . The differences in the values of L eff are mainly due to the small differences in the nucleon density distributions of heavy nuclei in the surface region and the behavior of the symmetry energy at subsaturation densities. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevC.93.064303 |
It is part of: | Physical Review C, 2016, vol. 93, p. 064303-1-064303-9 |
URI: | http://hdl.handle.net/2445/128277 |
Related resource: | https://doi.org/10.1103/PhysRevC.93.064303 |
ISSN: | 2469-9985 |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Física Quàntica i Astrofísica) |
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