Observation of a dominant $L=0\mathrm{}$ component in the ${}_{}{}^{18}{}_{}{}^{}\mathrm{O}({}_{}{}^3{}_{}{}^{}\mathrm{He},p){}_{}{}^{20}{}_{}{}^{}\mathrm{F}$ angular distribution to the 3.97-MeV state, when combined with previous restrictions, assigns $J^{\pi }=1^{+}$. An apparent $L=0\mathrm{}$ component for the 3.17-MeV state gives a tentative ($1^{+}$) assignment for that state. Both these states appear to consist largely of core excitation.

NUCLEAR REACTIONS ${}_{}{}^{18}{}_{}{}^{}\mathrm{O}({}_{}{}^3{}_{}{}^{}\mathrm{He},p)E=19.0\mathrm{}$ MeV, measured angular distributions for $1^{+}$ states; assigned $L=0+2\mathrm{}$ and hence $J^{\pi }=1^{+}$ for 3.175-, 3.966-MeV states.

• Received 29 March 1976

DOI:https://doi.org/10.1103/PhysRevC.14.1