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|Title:||Model dependence of the neutron-skin thickness on the symmetry energy|
Agrawal, B. K.
Centelles Aixalà, Mario
Roca Maza, Xavier
Viñas Gausí, Xavier
Singh, S. K.
Patra, S. K.
|Keywords:||Teoria del funcional de densitat|
|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|
|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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