Phenomenological theory of clustering at the nuclear surface and symmetry energy

Details Phenomenological theory of clustering at the nuclear surface and symmetry energy Phenomenological theory of clustering at the nuclear surface and symmetry energy

2010-04-14

arxiv.org/abs/1004.2315v4

Physics

Nuclear Physics

Nuclear Theory

18 pages, 3 figures, 3 table. Quantal shell corrections have been added. 376 spherical nuclei have been included. This improve

Scientific paper

We present a phenomenological theory of nuclei which incorporates clustering at the nuclear surface in a general form. The theory explains the recently extracted large symmetry energy at low densities of nuclear matter and is consistent with the static properties of nuclei. In phenomenological way clusters of all sizes, shapes along with medium modifications are included. The importance of quartic term in symmetry energy is demonstrated at and below the equilibrium density in nuclear matter. It is shown that it is related both to clustering as well as to the contribution of three-nucleon interaction to the equation of state of neutron matter. Reasons for these are discussed. Due to clustering the neutron skin thickness in nuclei reduces significantly.

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