Yields and angular distributions of the gamma rays from the first and second levels in ${\mathrm{C}}^{13}$ following excitation by inelastic proton scattering have been measured. Levels are observed at bombarding proton energies 3.80 Mev ($\Gamma =100\mathrm{}$ kev), 4.1 Mev ($\Gamma =150\mathrm{}$ kev), 4.14 Mev, and 4.52 Mev ($\Gamma =150\mathrm{}$ kev). The first three levels result in excitation of the first excited state and the last in excitation mainly of the second excited state of ${\mathrm{C}}^{13}$. ${\mathrm{N}}^{14}$ excitation energies corresponding to these levels are 11.07 Mev, ${11.3}_5$ Mev, 11.39 Mev, and 11.74 Mev. Possible spin and parity assignments are made on the basis of the $\gamma$-ray angular distribution of the 4.52-Mev level. The ${\mathrm{C}}^{13}(p, n){\mathrm{N}}^{13}$ neutron yield has been rerun yielding better values of the resonant energies. Neutron angular distributions are given for several bombarding proton energies.

• Received 25 April 1960

DOI:https://doi.org/10.1103/PhysRev.119.2026