Contrary to previous reports, we have detected α particles emitted from the 9.07-Mev state of ${\mathrm{F}}^{19}$ formed by the reaction ${\mathrm{O}}^{18}(p, \alpha ){\mathrm{N}}^{15}$. The $\alpha$-particle reduced width indicates that the isotopic spin of this state is $T=\frac{3}{2}$ with an admixture of about 15% of $T=\frac{1}{2}$. The spin of the state is determined to be $\frac{7}{2}$ from the $\alpha$-particle angular distribution, while odd parity seems to be favored.

• Received 24 March 1961

DOI:https://doi.org/10.1103/PhysRev.123.957