Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2011-03-21
Phys.Rev.C84:014321,2011
Physics
Nuclear Physics
Nuclear Theory
22 pages, 9 figures, 3 tables
Scientific paper
10.1103/PhysRevC.84.014321
A semi-microscopic model for nucleon pairing in nuclei is presented starting from the ab intio BCS gap equation with Argonne v18 force and the self-consistent Energy Density Functional Method basis characterized with the bare nucleon mass. The BCS theory is formulated in terms of the model space S0 with the effective pairing interaction calculated from the first principles in the subsidiary space S0. This effective interaction is supplemented with a small phenomenological addendum containing one phenomenological parameter universal for all medium and heavy atomic nuclei. We consider the latter as a phenomenological way to take into account both the many-body corrections to the BCS theory and the effective mass effects. For protons, the Coulomb interaction is introduced directly. Calculations made for several isotopic and isotonic chains of semi-magic nuclei confirm the validity of the model. The role of the self-consistent basis is stressed.
Baldo Marcello
Lombardo Umberto
Pankratov S. S.
Saperstein Eduard
Zverev M. V.
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