In116Activation Ratios

Abstract

The data of Domanic and Sailor regarding the ratio of the 54-min to the 13-sec activities of ${\mathrm{In}}^{116}$ produced by neutron capture in ${\mathrm{In}}^{115}$, previously published, have been corrected with experimentally determined self-absorption factors for 54-min ${\mathrm{In}}^{116}$. The results of these corrections have removed an anomaly observed between foils of different thicknesses, provided the foil is known to have been uniformly activated throughout its volume. The corrections appear to have removed a dependence of the ratio of activities on neutron energies from thermal to 2.66 ev. However, even after correction of the data there remains a substantial difference in the value of the ratio of activities at 3.86 ev. The corrected value of the ratio at 3.86 ev is about one half the value at the other energies investigated.