Yields of ${\mathrm{F}}^{18}$, ${\mathrm{Na}}^{22}$, and ${\mathrm{Na}}^{24}$ have been measured as a function of energy for both deuterons and protons on Mg. In some cases the yield of a single isotope can be attributed to a single nuclear reaction over a certain energy interval, this being done by a consideration of thresholds. These excitation curves are given over the ranges 0 to 20 Mev and 0 to 190 Mev for deuterons and from 0 to 31 Mev for protons.

• Received 23 July 1951

DOI:https://doi.org/10.1103/PhysRev.84.463