By using tritons from pile-irradiated Li, the reactions ${\mathrm{O}}^{18}(t, n){\mathrm{F}}^{20}$, ${\mathrm{O}}^{18}(t, \alpha ){\mathrm{N}}^{17}$, and ${\mathrm{N}}^{15}(t, p){\mathrm{N}}^{17}$ have been observed, and their relative yields obtained. The cross section at about 2.7 Mev of the well-known reaction ${\mathrm{O}}^{16}(t, n){\mathrm{F}}^{18}$ was also measured and is roughly 0.5 barn.

• Received 3 October 1955

DOI:https://doi.org/10.1103/PhysRev.102.242