Excitation functions for the production of the 2.74, 6.13, 6.92, and 7.12 MeV $\gamma$ rays by inelastic proton scattering on ${}^{16}\mathrm{O}$ have been measured in steps of 200–500 keV for proton energies $E_p=8.4\mathrm{}–20\hspace{0.5em}\mathrm{MeV}.$ For the 4.44 MeV $\gamma$ rays of ${}^{12}\mathrm{C}$ produced by inelastic proton scattering on ${}^{12}\mathrm{C}$ data have been obtained for proton energies $E_p=8.4\mathrm{}–14\hspace{0.5em}\mathrm{MeV}$ and at $E_p=17.25,18.25,$ and 19.75 MeV. Eight high efficiency Ge detectors with anti-Compton shielding for the $\gamma$-ray detection were used to obtain the laboratory $\gamma$-angular distributions. The results of Legendre polynom fits to these distributions are discussed and presented in suitable form for use in $\gamma$-ray astronomy.

• Received 16 April 1998

DOI:https://doi.org/10.1103/PhysRevC.58.2174