The alpha-particle groups from ${\mathrm{N}}^{14}$ and ${\mathrm{N}}^{15}$ targets bombarded with 1.4-Mev deuterons have been studied using a magnetic spectrometer. The $Q$-value for the ${\mathrm{N}}^{14}(d,\alpha ){\mathrm{C}}^{12}$ reaction is found to be 13.575±0.012 Mev, and the energies of the excited states observed in ${\mathrm{C}}^{12}$ are 4.438±0.014 and 9.620±0.013 Mev. For the ${\mathrm{N}}^{15}(d,\alpha ){\mathrm{C}}^{13}$ reaction, the $Q$-value is measured as 7.681±0.006 with excited states in ${\mathrm{C}}^{13}$ at 3.083±0.005 and 3.677±0.005 Mev.

• Received 26 October 1950

DOI:https://doi.org/10.1103/PhysRev.81.519