Systematics of fission fragment total kinetic energy release

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 $〈{E}_{K}〉=0.1189\frac{{Z}^{2}}{{A}^{\frac{1}{3}}}+7.3$ MeV, where $\frac{{Z}^{2}}{{A}^{\frac{1}{3}}}$ refers to the fissioning nucleus. This expression exhibits a somewhat steeper slope than previous fits.