The giant resonance region from 10 MeVϽ E x Ͻ 55 MeV in 90 Zr has been studied with inelastic scattering of 240 MeV ␣ particles at small angles including 0°. The isoscalar monopole resonance was found to contain 100± 12% of the E0 energy weighted sum rule with a centroid of ͑17.81+ 0.32− 0.20͒ MeV. Eighty one percent of the isoscalar E1 energy weighted sum rule was located in two peaks having E x = ͑17.1± 0.4͒ and ͑26.7± 0.5͒ MeV, ⌫ = ͑5.4± 0.3͒ and ͑8.8± 1.0͒ MeV, and containing 13± 3% and 70± 10%, respectively, of the E1 energy weighted sum rule.

The excitation region in 12 C below E x ϭ45 MeV was studied using 240 MeV ␣-particle scattering. Elastic scattering was measured from c.m. ϭ3.8°to 49.4°and density dependant folding optical model parameters were obtained. Inelastic scattering to the 4.44 MeV 2 ϩ , 7.65 MeV 0 ϩ , 9.64 MeV 3 Ϫ , 10.3 MeV 0 ϩ , and 10.84 MeV 1 Ϫ states was measured and B(EL) values obtained. Inelastic scattering exciting 12 C to 10 MeVрE x р12.5 MeV was measured from 1.4°р c.m. р10°and to 12.5 MeVрE x р45 MeV from 1.4°р c.m. р16°and E0, E1, E2, and E3 strength distributions were obtained. Strength was identified corresponding to 27Ϯ5, 78Ϯ9, and 51Ϯ7% of the isoscalar E0, E1, and E2 energy weighted sum rule ͑EWSR͒, respectively, with centroids of 21.9Ϯ0.3, 27.5Ϯ0.4, and 22.6Ϯ0.5 MeV and rms widths of 4.8Ϯ0.5, 7.6Ϯ0.6, and 6.8Ϯ0.6 MeV. Less than 7% of the E3 EWSR strength was identified.