Abstract
Competition of strong and decoupling is studied systematically for odd-odd mass nuclei as a function of the position of the Fermi surfaceseF(π) andeF(υ) and the deformationsβ andγ. As an example we use80Br. For a prolate deformation the odd proton likes to decouple while the odd neutron couples strongly. This favours a ground state angular momentum of 5 to 6. The strong coupling is described by the admixture of ad5/2 nucleon. Only for the neutrons the admixture is so appreciably that it affects the spectrum and improves the agreement between theory and experiment for80Br.
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