Magnetic dipole moments of odd-odd N=Z nuclei

The experimental data of the magnetic dipole moments of low-lying states in odd-odd N=Z nuclei, which has increased recently by a factor of 2, are revisited within the simple shell model, taking the wave functions to be of the form Ψ_core(J=0,T=0)Ψ_np(J,T=0). Good agreement with the updated experimental data is obtained within the jj-coupling scheme Ψ_np[(nlj)²J,(T=0)], using the Schmidt values for the g factor and also by using effective g factor deduced from nearby odd-A nuclei. We have also carried out a calculation of μ within the LS-coupling scheme Ψ_np[(1/2)²S(nl)²L,J,(T=0)] and also obtained good agreement with data. The success of these simple models in reproducing the experimental data is discussed.