The cross section and analyzing power for ${}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}(\overrightarrow{p}, p_0){}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$ have been measured at 13 angles and 11 energies in the vicinity of the 4.0 MeV resonance. A phase-shift analysis of the results yields a spin and parity assignment of ${\frac{3}{2}}^{+}$ in conflict with the accepted value of ${\frac{5}{2}}^{+}$.

NUCLEAR REACTION ${}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}(p, p)$, $E=3.89-4.17\mathrm{}$ MeV; measured $\sigma (E, \theta )$, $P(E, \theta )$; ${}_{}{}^{25}{}_{}{}^{}\mathrm{Al}$ deduced resonance, $J$, $\Pi$, $\Gamma$, ${\Gamma }_p$; enriched target.

• Received 1 March 1982

DOI:https://doi.org/10.1103/PhysRevC.26.254