Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English   Periodicity: 4 times per year   Open access peer reviewed journal

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V. M. Kolomietz, A. I. Sanzhur

Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine

Abstract: The procedure of derivation of the symmetry energy from the shift of neutron-proton chemical potentials Δλ = λ_n - λ_p is suggested. We observe the nonmonotonic (sawtooth) shape of the β-stability line given by the asymmetry parameter as a function of mass number. The behavior of the symmetry energy coefficient b_sym(A) at fixed neutron excess D = N - Z is analyzed. We show the relation of local maxima of the β-stability line to mass numbers of the double-closed shells.

Keywords: symmetry energy, isotopic shift, β-stability line, shell oscillations.

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