Cross Sections for Production ofIn115mandAu197mby Inelastic Scattering of Neutrons

Cross sections for the reactions ${\mathrm{In}}^{115}(n, n^{\prime }){\mathrm{In}}^{115m}$ and ${\mathrm{Au}}^{197}(n, n^{\prime }){\mathrm{Au}}^{197m}$ have been measured from the reaction thresholds to 5.5 Mev. The lowest mean energy for which the ${\mathrm{In}}^{115m}$ excitation was observed was 440 kev with an energy spread of ±100 kev; the cross section rises to a peak value of 0.36 barn at 2.5 Mev. The lowest mean energy for which the ${\mathrm{Au}}^{197m}$ excitation was observed was 420 kev with an energy spread of ±40 kev; the cross section rises to a peak value of 1.3 barns at 2.5 Mev. Both cross sections show irregularities which are evidence of energy levels in the target nuclei.