Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1997-11-30
Nucl. Phys. A, 635 (1998) 193
Physics
Nuclear Physics
Nuclear Theory
47 pages, 17 figures in .tar.gz format Accepted for publishing in Nuclear Physics A
Scientific paper
10.1016/S0375-9474(98)00167-5
Surface and curvature properties of asymmetric nuclear matter are studied beyond the proton drip. Using the semiclassical extended Thomas-Fermi method, the calculations are performed in the non-relativistic and relativistic meson field theories (Skyrme forces and non linear sigma-omega parametrizations). First we discuss the bulk equilibrium between the nuclear and drip phases. Next we analyze the asymmetric surface as a function of the bulk neutron excess. We examine local quantities related to the density profiles and, for two definitions of the bulk reference energy, the surface and curvature energy coefficients. The calculation of the curvature energy is carefully treated. The sensitivity of the nuclear surface to the relativistic effects is investigated. Mass formulae useful for arbitray neutron excess are discussed, and their limit at small asymmetries is compared with the liquid droplet model mass formula.
Centelles Mario
Estal Del M.
Viñas Xavier
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