Isoscalar giant resonances in Zr 90 , 92 , 94

Isoscalar giant resonances in Zr-90,Zr-92,Zr-94 have been studied with inelastic scattering of 240 MeV alpha particles at small angles including 0 degrees. A significant fraction of the energy-weighted sum rule (EWSR) was found for isoscalar E0 (106%, 103%, 106%), E1 (64%, 53%, 96%), E2 (92%, 93%, 67%) and high energy octupole E3 (59%, 69%, 58%) resonances in Zr-90,Zr-92,Zr-94 respectively. Hartree-Fock random phase approximation (RPA) calculations were made for each multipole using the KDE0v1 Skyrme-type effective nucleon-nucleon interaction and the results are compared to the experimental distributions.