Isovector effective mass in the Skyrme-Hartree-Fock method

Physics

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Binding Energies And Masses, Level Density, Hartree-Fock And Random-Phase Approximations, Elementary Particle Processes

Scientific paper

Skyrme-Hartree-Fock-BCS calculations show that the nuclear mass data constrain the value of the isovector effective mass M*v in the vicinity of the Fermi surface to lie in the range of 0.90M+/-0.20M, M being the real nucleon mass. These rather large error bars imply uncertainties of up to 4 MeV in the mass extrapolations out to the neutron-drip line, but the corresponding uncertainties in the extrapolated neutron-separation energies Sn, beta-decay energies Qβ, and nuclear level densities are too small to be significant for the r process of nucleosynthesis.

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