Abstract
Double mass differences between nuclei having a magic number of protons (neutrons) and their neighbors differing by one or two protons (neutrons) have been calculated on the basis of a semimicroscopic model that has been proposed recently for the problem of nuclear pairing. A dominant term of the effective nucleonnucleon interaction has been calculated on the basis of the realistic Argonne nucleon-nucleon potential v18. It has been supplemented with a moderately small phenomenological term that contains one universal parameter common to protons and neutrons. Double mass differences have been calculated for proton neighbors of the lead-isotope chain (Z = 82) and for neutron neighbors of N = 82 isotones. Corrections to the model that are caused by the contribution of low-lying surface vibrations (phonons) have been estimated.
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