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Title: Analysis of bulk and surface contributions in the neutron skin of nuclei
Author: Warda, M.
Viñas Gausí, Xavier
Roca Maza, Xavier
Centelles Aixalà, Mario
Keywords: Física nuclear
Constitució de la matèria
Astrofísica nuclear
Nuclear physics
Constitution of matter
Nuclear astrophysics
Issue Date: 2010
Publisher: American Physical Society
Abstract: The neutron skin thickness of nuclei is a sensitive probe of the nuclear symmetry energy and has multiple implications for nuclear and astrophysical studies. However, precision measurements of this observable are difficult to obtain. The analysis of the experimental data may imply some assumptions about the bulk or surface nature of the formation of the neutron skin. Here we study the bulk or surface character of neutron skins of nuclei following from calculations with Gogny, Skyrme, and covariant nuclear mean-field interactions. These interactions are successful in describing nuclear charge radii and binding energies but predict different values for neutron skins. We perform the study by fitting two-parameter Fermi distributions to the calculated self-consistent neutron and proton densities. We note that the equivalent sharp radius is a more suitable reference quantity than the half-density radius parameter of the Fermi distributions to discern between the bulk and surface contributions in neutron skins. We present calculations for nuclei in the stability valley and for the isotopic chains of Sn and Pb.
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It is part of: Physical Review C, 2010, vol. 81, num. 5, p. 054309-1-054309-13
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ISSN: 0556-2813
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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