Masses of deformed nuclei with Z>N

The masses of Z>N nuclei have been calculated on the basis of the Harvey-Kelson equation for mirror nuclei, where the mass differences for T=1/2 isobaric nuclei are expressed in terms of the shift of the Coulomb energy, ΔECoul, for isobars with neighboring Z values. The Coulomb energy shift ΔECoul has been calculated with the aid of a semiphenomenological shell-model expression for diagonal nuclei that takes into account the quadrupole nuclear deformation β2. Two alternative sets of β2 values have been used. In one of these, the quadrupole deformation β2 is calculated on the basis of the Jaenecke formula with parameters determined from experimental data. In the second set, the values of β2 are set to those that are obtained in the microscopic-macroscopic model by optimizing the values of nuclear masses. Either scheme for computing β2 leads to the conclusion that the effect of deformation is insignificant in the region of nuclei with Z=9-35 and 51-56 and that the masses of nuclides with Z=36-50 and 57-70 are markedly less than the masses of spherical nuclei