Folded potential analysis of the excitation of giant resonances by heavy ions.

Abstract

Measurements of the excitation of nuclear giant resonances by heavy-ion inelastic scattering have previously been analyzed using the deformed optical potential model. Here we reexamine these data using a folded potential model which employs a simple, but effective, nucleon-nucleon interaction that was deduced recently from heavy-ion elastic scattering measurements. The resulting estimates of the sum-rule exhaustion by the giant quadrupole resonance increase by amounts ranging from about 20% for the lighter targets to no change for $^{208}\mathrm{Pb}$. Applying the same model to data for excitation of the giant monopole resonance, we find that these transitions overexhaust the corresponding sum rule even more than previously indicated.