Systematics of fission fragment total kinetic energy release

Abstract

Recent data for the most probable total kinetic energy release in fission $〈E_K〉$, have been combined with earlier results in order to reevaluate the systematic dependence of these values on the Coulomb parameter $\frac{Z^2}{A^{\frac{1}{3}}}$. A least-squares analysis of the current data base yields $〈E_K〉=0.1189\mathrm{}\frac{Z^2}{A^{\frac{1}{3}}}+7.3\mathrm{}$ MeV, where $\frac{Z^2}{A^{\frac{1}{3}}}$ refers to the fissioning nucleus. This expression exhibits a somewhat steeper slope than previous fits.