Inelastic scattering of ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ particles at 110-140 MeV from ${}_{}{}^{90,92}{}_{}{}^{}\mathrm{Zr}$, ${}_{}{}^{116,118,120}{}_{}{}^{}\mathrm{Sn}$, ${}_{}{}^{114}{}_{}{}^{}\mathrm{Sm}$, and ${}_{}{}^{208}{}_{}{}^{}\mathrm{Pb}$ nuclei exhibits the presence of a new giant resonance at $E_x\sim 118A^{-\frac{1}{3}}$ MeV with a width of about 7 MeV. The angular distributions are consistent with those for $L=3\mathrm{}$ transfer and octupole energy-weighted sum-rule fractions of 47-95% are exhausted for the resonance.

NUCLEAR REACTIONS ${}_{}{}^{90,92}{}_{}{}^{}\mathrm{Zr}$, ${}_{}{}^{116,118,120}{}_{}{}^{}\mathrm{Sn}$, ${}_{}{}^{144}{}_{}{}^{}\mathrm{Sm}$, ${}_{}{}^{208}{}_{}{}^{}\mathrm{Pb}$ ${}_{}{}^3{}_{}{}^{}\mathrm{He}$, ${}_{}{}^3{}_{}{}^{}\mathrm{He}\prime$), $E=110\mathrm{}-140$ MeV. Measured $\sigma (\theta ,E)$. Deduced giant octupole resonance, $E_x$, ${\beta }_3$, EWSR. Enriched target.

• Received 14 October 1980

DOI:https://doi.org/10.1103/PhysRevC.23.937