Cross sections for (n, xn) reactions between 7.5 and 28 MeV

A total of 236 cross sections for ($n, \mathrm{xn}$) reactions have been measured at neutron energies between 7.5 and 28 MeV, using radiochemical techniques. Cross sections for ($n, n^{\prime }$) and ($n, 2n$) reactions are reported on ${}_{}{}^{193}{}_{}{}^{}\mathrm{Ir}$; ($n, 2n$) cross sections on ${}_{}{}^{45}{}_{}{}^{}\mathrm{Sc}$ and ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$; ($n, 2n$) and ($n, 3n$) cross sections on ${}_{}{}^{89}{}_{}{}^{}\mathrm{Y}$, ${}_{}{}^{90}{}_{}{}^{}\mathrm{Zr}$, and ${}_{}{}^{107}{}_{}{}^{}\mathrm{Ag}$; ($n, 2n$), ($n, 3n$), and ($n, 4n$) cross sections on ${}_{}{}^{169}{}_{}{}^{}\mathrm{Tm}$, ${}_{}{}^{175}{}_{}{}^{}\mathrm{Lu}$, ${}_{}{}^{191}{}_{}{}^{}\mathrm{Ir}$, ${}_{}{}^{197}{}_{}{}^{}\mathrm{Au}$, and ${}_{}{}^{203}{}_{}{}^{}\mathrm{Tl}$; ($n, 3n$) and ($n, 4n$) cross sections on ${}_{}{}^{151}{}_{}{}^{}\mathrm{Eu}$; and ($n, 4n$) cross sections on ${}_{}{}^{205}{}_{}{}^{}\mathrm{Tl}$. Neutron fluences were determined by either the ${}_{}{}^{27}{}_{}{}^{}\mathrm{Al}(n, \alpha ){}_{}{}^{24}{}_{}{}^{}\mathrm{Na}$ or the ${}_{}{}^{90}{}_{}{}^{}\mathrm{Zr}(n, 2n){}_{}{}^{89}{}_{}{}^{}\mathrm{Zr}$ reactions appropriately combined with proton-recoil telescope measurements. The excitation functions are compared with calculations based on a model incorporating both compound-nucleus and preequilibrium decay modes. Cross sections for the ${}_{}{}^{27}{}_{}{}^{}\mathrm{Al}(n, \alpha ){}_{}{}^{24}{}_{}{}^{}\mathrm{Na}$ reaction between 21 and 26 MeV are also reported.