Cross sections for (n,2n) and (n,3n) reactions above 14 MeV

Cross sections for ($n,2n$) and ($n,3n$) reactions have been measured between 14.7 and 24.0 MeV using a large liquid scintillator to detect neutrons. Measurements were made for ${}_{}{}^{45}{}_{}{}^{}\mathrm{Sc}$, ${}_{}{}^{59}{}_{}{}^{}\mathrm{Co}$, ${}_{}{}^{89}{}_{}{}^{}\mathrm{Y}$, ${}_{}{}^{93}{}_{}{}^{}\mathrm{Nb}$, ${}_{}{}^{103}{}_{}{}^{}\mathrm{Rh}$, ${}_{}{}^{169}{}_{}{}^{}\mathrm{Tm}$, ${}_{}{}^{175}{}_{}{}^{}\mathrm{Lu}$, ${}_{}{}^{181}{}_{}{}^{}\mathrm{Ta}$, ${}_{}{}^{197}{}_{}{}^{}\mathrm{Au}$, and ${}_{}{}^{209}{}_{}{}^{}\mathrm{Bi}$ samples. The excitation functions are compared with calculations based on a statistical, preequilibrium model using global sets of optical model and level density parameters.