Ratios of Independent Yields of the Isomers ${\mathrm{Te}}^{131-131m}$ and ${\mathrm{Te}}^{133-133m}$ in Fission

The independent yield ratios of $\frac{(30\mathrm{}-\mathrm{h} {\mathrm{Te}}^{131m})}{(25\mathrm{}-\mathrm{m}\mathrm{i}\mathrm{n} {\mathrm{Te}}^{131})}$ and of $\frac{(53\mathrm{}-\mathrm{m}\mathrm{i}\mathrm{n} {\mathrm{Te}}^{133m})}{(12.5\mathrm{}-\mathrm{m}\mathrm{i}\mathrm{n} {\mathrm{Te}}^{133})}$ were measured in the following types of fission: ${\mathrm{U}}^{235}$ with thermal neutrons, and ${\mathrm{Th}}^{232}$ and ${\mathrm{U}}^{238}$ with 18-MeV deuterons and with 33-MeV ${\mathrm{He}}^4$ ions. The fractional independent chain yields of the isomers were measured by determining the growth curves of the daughter iodine activities extracted at successive time intervals from aliquots of samples containing tellurium activities quickly separated from fission induced in short irradiations, and correcting for contributions from precursors. The isomer-yield ratios for independent formation for $\frac{30-\mathrm{h} {\mathrm{Te}}^{131m}}{25-\mathrm{m}\mathrm{i}\mathrm{n} {\mathrm{Te}}^{131}}$ and for $\frac{53-\mathrm{m}\mathrm{i}\mathrm{n} {\mathrm{Te}}^{133m}}{12.5-\mathrm{m}\mathrm{i}\mathrm{n} {\mathrm{Te}}^{133}}$, respectively, are as follows: 1.8±0.4 and 1.55±0.5 for ${\mathrm{U}}^{235}(n_{\mathrm{th}},F)$, 3.3±0.5 and 2.8±1.7 for ${\mathrm{Th}}^{232}({\alpha }_{33},F)$, 2.7±0.5 and 1.7±0.9 for ${\mathrm{Th}}^{232}(d_{18},F)$, 5.0±1.0 and 3.1±2.0 for ${\mathrm{U}}^{238}({\alpha }_{33},F)$, and 3.3±0.5 and 1.8±1.1 for ${\mathrm{U}}^{238}(d_{18},F)$. The fractional independent chain yield of ${\mathrm{Te}}^{131m}+{\mathrm{Te}}^{131}$ was measured as 0.124±0.014 for ${\mathrm{U}}^{235}(n_{\mathrm{th}},F)$. The fraction of decay of