High-Energy Proton Spallation of Titanium

The cross sections for the production of ${}_{}{}^{48}{}_{}{}^{}\mathrm{V}$, ${}_{}{}^{48}{}_{}{}^{}\mathrm{Sc}$, ${}_{}{}^{47}{}_{}{}^{}\mathrm{Sc}$, ${}_{}{}^{47}{}_{}{}^{}\mathrm{Ca}$, ${}_{}{}^{46}{}_{}{}^{}\mathrm{Sc}$, ${}_{}{}^{44m}{}_{}{}^{}\mathrm{Sc}$, ${}_{}{}^{44}{}_{}{}^{}\mathrm{Ti}$, ${}_{}{}^{43}{}_{}{}^{}\mathrm{K}$, ${}_{}{}^{42}{}_{}{}^{}\mathrm{K}$, ${}_{}{}^{28}{}_{}{}^{}\mathrm{Mg}$, ${}_{}{}^{24}{}_{}{}^{}\mathrm{Na}$, ${}_{}{}^{22}{}_{}{}^{}\mathrm{Na}$, and ${}_{}{}^7{}_{}{}^{}\mathrm{Be}$ from 15- to 584-MeV proton spallation of titanium are reported. The experimental production rates of the various isotopes and their ratios to ${}_{}{}^{47}{}_{}{}^{}\mathrm{Sc}$ are compared with theoretical spallation-yield calculations. Application of the measured excitation functions to the analysis of lunar materials and meterorites is discussed.