Ground-state magnetization density of Y89

Elastic electron scattering cross sections have been measured for Y-89 at 180-degrees for 0.72 < q < 2.67 fm-1. The M1 form factor has been extracted and a Fourier-Bessel analysis performed to obtain the ground-state magnetization density. Calculations including effects of core polarization have been performed within the framework of the finite Fermi system theory. These show a weakening of the strong repulsion in the spin-isospin channel and are in overall agreement with the data.