In this paper we predict atomic masses which are not experimentally accessible by using local mass relations which connect with the proton-neutron interactions with improved accuracy. Based on our predicted masses, we investigate one-proton and one-neutron drip lines for a few regions in the nuclide chart and alpha-decay half-lives times for some isotopes with proton number 102 <= Z <= 106. The impact of our predicted one-neutron separation energies on astrophysical r-process nucleosynthesis is discussed within the framework of a classical r-process model
Based on the semi-classical extended Thomas-Fermi approach, we study the mass dependence of the symmetry energy coefficients of finite nuclei for 36 different Skyrme forces. The reference densities of both light and heavy nuclei are obtained. Eight models based on nuclear liquid drop concept and the Skyrme force SkM* suggest the symmetry energy coefficient a sym = 22.90 ± 0.15 MeV at A = 260, and the corresponding reference density is ρ A ≃ 0.1 fm −3 at this mass region. The standard Skyrme energy density functionals give negative values for the coefficient of the I 4 term in the binding energy formula, whereas the latest Weizsäcker-Skyrme formula and the experimental data suggest positive values for the coefficient. * wangning@gxnu.edu.cn
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