A separated isotopic target of ${\mathrm{O}}^{17}$ has been used to study the excitation function of ground-state alpha particles from the reaction ${\mathrm{O}}^{17}(p, \alpha ){\mathrm{N}}^{14}$ for proton energies between 1 and 3 Mev. Thirteen levels in ${\mathrm{F}}^{18}$ have been found, with excitation energies 6.666, 6.820, 7.304, 7.527, 7.552, 7.713, 7.728, 7.889, 7.917, 8.094, 8.216, 8.238, and 8.382 Mev.

• Received 14 December 1956

DOI:https://doi.org/10.1103/PhysRev.106.124