Electroexcitation of the Giant Resonance inO16

Abstract
Electroexcitation of O16 has been measured. The strength for the E2 (or E0) resonances were extracted from the longitudinal form factors. In the region of 20-30-MeV excitation the strength exhausts approximately 20% of the sum rule for an E2 interpretation, while the strength in the region below 20 MeV exhausts 43% of the same sum rule. The transverse form factor is compared with calculations using both the one-particle, one-hole and the generalized Goldhaber-Teller models.