NEUTRON SKIN THICKNESS IN NEUTRON-RICH NUCLEI: BULK AND SURFACE CONTRIBUTIONS AND SHELL EFFECTS

作者：Vinas X^*; Warda M; Centelles M; Roca Maza X

来源：International Journal of Modern Physics E-Nuclear Physics, 2012, 21(5): 1250029.

DOI：10.1142/S0218301312500292

• Neutron skin
• symmetry energy
• neutron density distributions
• nuclear mean field

We analyze theoretically the neutron skin thickness in nuclei and its correlation with the symmetry energy by using semiclassical and mean field approaches together with nuclear effective innteractions. Semiclassical approaches reveal that the neutron skin thickness in nuclei is formed by a combination of bulk and surface contributions. To investigate the neutron skin thickness predicted by mean field models, we fit the corresponding densities by two-parameter Fermi distributions. Using these parametrized densities, we study the neutron skin thickness as well as its bulk and surface contributions in Pb-208, and in Zr isotopes, where the influence of shell effects along the isotopic chain is discussed.

• 出版日期2012-5