Nuclear Charge Distribution in Fission: Fractional Cumulative Yields ofTe132andTe134from Thermal-Neutron-Induced Fission ofCm245andCf249

Abstract

Fractional cumulative yields of $^{132}\mathrm{Te}$ and $^{134}\mathrm{Te}$ have been measured from thermal-neutron-induced fission of $^{245}\mathrm{Cm}$ and $^{249}\mathrm{Cf}$. The yields, expressed as ratios of atoms of tellurium to atoms of tellurium plus iodine, are 0.94 \ifmmode\pm\else\textpm\fi{} 0.01 and 0.59 \ifmmode\pm\else\textpm\fi{} 0.07 for $^{245}\mathrm{Cm}$ fission, and 0.76 \ifmmode\pm\else\textpm\fi{} 0.02 and 0.36 \ifmmode\pm\else\textpm\fi{} 0.05 for $^{249}\mathrm{Cf}$ fission. Fractional yields based on estimated total chain yields are the same as above for $^{132}\mathrm{Te}$ but decrease to 0.56 \ifmmode\pm\else\textpm\fi{} 0.08 and 0.29 \ifmmode\pm\else\textpm\fi{} 0.06 for $^{134}\mathrm{Te}$. The yielas are not consistent with similar yields from $^{233}\mathrm{U}$ and $^{235}\mathrm{U}$ fission.