CORE CONTRIBUTION TO THE NUCLEAR MAGNETIC QUADRUPOLE-MOMENT

The contribution of core nucleons to a static magnetic quadrupole mome nt is calculated in the presence of an interaction that violates P and T invariance. The contribution found can be comparable or even larger than the contribution of a valence nucleon, in contrast to the case o f the P-violating but T-invariant anapole moment. The core contributio n appears to be sensitive to the spin-orbit single-particle potential, which enhances it by a factor of similar to 2.