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Abstract

The Interacting Boson Model is applied to the even Kr 90 76− isotopes. Excitation energies, electromagnetic transition strengths, quadrupole and magnetic dipole moments, and δ (E2/M1) multiple mixing ratios, monopole transitions and mixed symmetry states have been described systematically. It is seen that the properties of low-lying levels in these isotopes, for which the comparison between experiment and IBM-2 calculations is possible, can be satisfactorily characterized by the Interacting Boson Model-2 (IBM-2).