Core polarization corrections to magnetic dipole moments and transitions

Core polarization corrections to ground state magnetic dipole moments are calculated in first-order perturbation theory, with the use of Sussex matrix elements. These corrections are introduced in the particle-(hole-) core coupling model. It is shown that the need for effectiveg _s factors in the calculation of magnetic moments can be explained largely in terms of one-particle-one-hole polarization effects of the core. The influence of these effects on the reducedM1 transition probabilities forl-forbidden transition is also considered.