Protons from Deuteron Bombardment ofC13

Comparison of the proton groups emitted under deuteron bombardment by a target of ordinary carbon and by one enriched 25 times in ${\mathrm{C}}^{13}$ shows the existence of an excited state of ${\mathrm{C}}^{14}$ at 5.24±0.29 Mev. This state serves as a possible source for the known 5.5-Mev $\gamma$-rays. There is no evidence of any lower-lying excited level in the ${\mathrm{C}}^{14}$ nucleus.