Production ofIn111andIn114mfrom the Separated Isotopes of Cadmium Using 70- to 400-MeV Protons

The cross sections for the ${\mathrm{Cd}}^{110+z}\mathrm{}(p,xn)\mathrm{}{\mathrm{In}}^{111}$ and the ${\mathrm{Cd}}^{113+z}\mathrm{}(p,xn)\mathrm{}{\mathrm{In}}^{114m}$ reactions at proton energies from 70 to 400 MeV have been measured using the separated isotopes of cadmium as targets. The energy dependence of the ($p,n$), ($p,2n$), and ($p,3n$) reactions is inversely proportional to the incident energy over the entire energy region, while the ($p,4n$) and ($p,6n$) reactions exhibit this energy dependence only above 150 MeV. This similar energy dependence of the ($p,xn$) reactions supports the conclusion that these reactions take place by the same mechanism: a $p-n$ cascade step followed by the evaporation of $x-1\mathrm{}$ neutrons. The change in the energy dependence of the ($p,4n$) and ($p,6n$) reactions below 100 MeV is probably due to contributions from compound-nucleus processes. The experimental results are compared with Monte Carlo cascade and evaporation calculations.