2-TO-ONE RELATIONSHIPS BETWEEN THE SPECTRA OF SELECTED EVEN-EVEN AND EVEN-ODD NUCLEI

Data are gathered to put to the test of a prediction of the single j shell model, that for selected nuclei the excitation energy of the double isobaric analog state in an even-even nucleus is twice the excitation energy of the single analog state in the adjacent even-odd nucleus. This two-to-one relationship works much better than one would expect. The effects of configuration mixing and the Coulomb interaction are considered.