MAGNETIC-MOMENTS OF ODD-A SB ISOTOPES TO SB-133 - SIGNIFICANT EVIDENCE FOR MESONIC EXCHANGE CURRENT CONTRIBUTIONS AND ON CORE COLLECTIVE G-FACTOR

The magnetic moments of (double magic + 1 proton) nuclei having a ''ja ck-knife'' j = l - s configuration form crucial tests for the theoreti cal treatment of mesonic exchange currents and core polarization effec ts in finite nuclei. The reported precision measurement and analysis o f the magnetic moment of Sb-133 (Sn-132 + one g(7/2) proton) mu = 3.00 (1)mu(N) provides the first such test in medium-heavy nuclei. In addit ion, new data on the N dependence of the 7/2(+ 123-133)Sb ground state moments are presented. Analysis in terms of particle-core coupling in dicates slightly negative collective g factors of heavy Sn core nuclei .