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Journal Articles Romanian Reports in Physics Year : 2007

On the mass formula and Wigner and curvature energy terms

Guy Royer

Abstract

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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Dates and versions

in2p3-00178884 , version 1 (12-10-2007)

Identifiers

  • HAL Id : in2p3-00178884 , version 1
  • ARXIV : 0710.2503

Cite

Guy Royer. On the mass formula and Wigner and curvature energy terms. Romanian Reports in Physics, 2007, 59, pp.625-634. ⟨in2p3-00178884⟩
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