Independent Fission Yield ofSb127

Abstract

The fractional independent yield of ${\mathrm{Sb}}^{127}$ has been found to be 0.057\ifmmode\pm\else\textpm\fi{}0.010 from the thermal-neutron fission of ${\mathrm{U}}^{235}$. This value leads to a calculated value of 49.5\ifmmode\pm\else\textpm\fi{}0.1 for the "most probable charge" ${Z}_{P}$ for fission products with $A=127$ and implies that there is no pronounced effect of the 50-proton shell on the ${Z}_{P}$ function. It was also found that 40.4\ifmmode\pm\else\textpm\fi{}2.4% of fission-product ${\mathrm{Sb}}^{127}$ is formed by beta decay of 4.4-min ${\mathrm{Sn}}^{127}$ and that 53.9\ifmmode\pm\else\textpm\fi{}2.1% is formed by beta decay of 2.15-h ${\mathrm{Sn}}^{127}$.