On the mass formula and Wigner and curvature energy terms

Details On the mass formula and Wigner and curvature energy terms On the mass formula and Wigner and curvature energy terms

2007-10-12

arxiv.org/abs/0710.2503v1

Rom.Rep.Phys.59:625-634,2007

Physics

Nuclear Physics

Nuclear Experiment

Scientific paper

The efficiency of different mass formulas derived from the liquid drop model including or not the curvature energy, the Wigner term and different powers of the relative neutron excess $I$ has been determined by a least square fitting procedure to the experimental atomic masses assuming a constant R$_{0,charge}$/A$^{1/3}$ ratio. The Wigner term and the curvature energy can be used independently to improve the accuracy of the mass formula. The different fits lead to a surface energy coefficient of around 17-18 MeV, a relative sharp charge radius r$_0$ of 1.22-1.23 fm and a proton form-factor correction to the Coulomb energy of around 0.9 MeV.

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