$\alpha$ particles from the ${}_{}{}^{32}{}_{}{}^{}\mathrm{S}(p,\alpha )$ reaction were momentum analyzed with our 100-cm modified broad range magnetic spectrograph to determine accurate excitation energies in ${}_{}{}^{29}{}_{}{}^{}\mathrm{P}$. Runs were taken at laboratory observation angles of 60, 90, and 120° using protons with nominal bombarding energies of 15 and 16 MeV. Five previously unreported levels in ${}_{}{}^{29}{}_{}{}^{}\mathrm{P}$ were identified at 4.6406 ± 0.0030, 5.0473 ± 0.0032, 5.5827 ± 0.0035, 5.7155 ± 0.0036, and 5.8259 ± 0.0048 MeV. Comparisons are made both with theoretical level calculations and the level structure of the conjugate nucleus ${}_{}{}^{29}{}_{}{}^{}\mathrm{Si}$. A Breit-Wigner shape was used to fit the group at 4.3371 MeV; the width of this level was determined to be 48.7 ± 2.5 keV.

NUCLEAR REACTIONS ${}_{}{}^{32}{}_{}{}^{}\mathrm{S}(p,\alpha )$ $E_p=15\mathrm{} \mathrm{and} 16$ MeV; ${\theta }_{\mathrm{lab}}=60, 90, \mathrm{and} 120°$. Measured excitation energies; deduced five previously unreported levels below 6 MeV.

• Received 11 April 1974

DOI:https://doi.org/10.1103/PhysRevC.10.991