Model dependence of the neutron-skin thickness on the symmetry energy

Mondal, C. and Agrawal, B. K. and Centelles, M. and Colò, G. and Roca-Maza, X. and Paar, Nils and Viñas, X. and Singh, S. K. and Patra, S. K. (2016) Model dependence of the neutron-skin thickness on the symmetry energy. Physical Review C, 93 (6). pp. 64303-9. ISSN 2469-9985

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The model dependence in the correlations of the neutron-skin thickness in heavy nuclei with various symmetryenergy 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 208Pb nucleus. The effective value of the symmetry-energy slope parameter Leff, 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 Leff 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.

Item Type: Article
Keywords: neutron skin
Date: 2 June 2016
Subjects: NATURAL SCIENCES > Physics > Nuclear Physics
Additional Information: © 2016 American Physical Society. Received 8 April 2016; published 2 June 2016.
Divisions: Faculty of Science > Department of Physics
Project code: HRZZ-IP-2014-09-9159
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 13 Jul 2016 09:43
Last Modified: 29 Nov 2017 16:48

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