Electroexcitation of ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ has been measured. The strength for the $E2\mathrm{}$ (or $E0\mathrm{}$) 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 $E2\mathrm{}$ 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.

• Received 15 July 1974

DOI:https://doi.org/10.1103/PhysRevLett.33.790