Determining the density content of symmetry energy and neutron skin: an empirical approach

The density dependence of nuclear symmetry energy remains poorly constrained. Starting from precise empirical values of the nuclear volume and surface symmetry energy coefficients and the nuclear saturation density, we show how in the ambit of microscopic calculations with different energy density f...

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Bibliographic Details
Published in:Physical review letters 2012-12, Vol.109 (26), p.262501-262501, Article 262501
Main Authors: Agrawal, B K, De, J N, Samaddar, S K
Format: Article
Language:English
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Summary:The density dependence of nuclear symmetry energy remains poorly constrained. Starting from precise empirical values of the nuclear volume and surface symmetry energy coefficients and the nuclear saturation density, we show how in the ambit of microscopic calculations with different energy density functionals, the value of the symmetry energy slope parameter L along with that for neutron skin can be put in tighter bounds. The value of L is found to be L=64±5  MeV. For 208Pb, the neutron skin thickness comes out to be 0.188±0.014  fm. Knowing L, the method can be applied to predict neutron skin thicknesses of other nuclei.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.109.262501