articlePhysics Letters BMay 20, 2014DIAMOND OA

Surface diffuseness correction in global mass formula

NWNing WangMLMin LiuXWXizhen WuJMJie Meng

Guangxi Normal University · China Institute of Atomic Energy · +3 more institutions

Indexed inarxivcrossrefdoaj

Abstract

By taking into account the surface diffuseness correction for unstable nuclei, the accuracy of the macroscopic–microscopic mass formula is further improved. The rms deviation with respect to essentially all the available mass data falls to 298 keV, crossing the 0.3 MeV accuracy threshold for the first time within the mean-field framework. Considering the surface effect of the symmetry potential which plays an important role in the evolution of the “neutron skin” toward the “neutron halo” of nuclei approaching the neutron drip line, we obtain an optimal value of the symmetry energy coefficient J=30.16 MeV. With an accuracy of 258 keV for all the available neutron separation energies and of 237 keV for the…

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Topics & keywords

Topics
Keywords
  • Physics
  • Neutron
  • Nuclear physics
  • Halo nucleus
  • Symmetry (geometry)
  • Nucleosynthesis
  • Nuclear drip line
  • Mean field theory
UN Sustainable Development Goals
  • Affordable and clean energy
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