Separated targets of ${\mathrm{O}}^{18}$ on thick and thin backings have been used in a search for proton groups from the reaction ${\mathrm{O}}^{18}(d, p){\mathrm{O}}^{19}$. Three proton groups due to this reaction were found. Their energies were measured with a double focusing magnetic spectrometer which in this case was calibrated with known particle group energies from ${\mathrm{B}}^{10}(d, p){\mathrm{B}}^{11}$ and ${\mathrm{N}}^{14}(d, p){\mathrm{N}}^{15}$. The $Q$ values of ${\mathrm{O}}^{18}(d, p){\mathrm{O}}^{19}$ are $Q_1=1730\mathrm{}\pm 8$ kev, $Q_2=1636\mathrm{}\pm 8$ kev, and $Q_3=262\mathrm{}\pm 6$ kev.

• Received 28 June 1954

DOI:https://doi.org/10.1103/PhysRev.96.996