Isospin Dependence of Experimental Nuclear Deformations

Isospin effects in nucleon inelastic scattering have been studied by comparing quadrupole deformation parameters deduced from measured ($n, n^{\prime }$) cross sections with values for ($p, p^{\prime }$) and values for electromagnetic excitation found in the literature. Proton-vibrational nuclei with $N=50\mathrm{}$ and neutron-vibrational nuclei with $Z=50\mathrm{}$ were studied. Predicted effects of core polarization are observed. Difficulties in interpreting detailed numerical relationships are discussed.