Evaluation of the Total Kinetic Energy of the Fission Fragments as a function of Incident-Neutron Energy

Predictions for the incident-neutron energy dependence of the total kinetic energy (TKE) release in the ²³⁹Pu(n,f) and ²³⁵U(n,f) reactions beyond the threshold of second-chance fission have been confirmed by recent experiments at Los Alamos. An evaluation of the measured energy dependence of the post-neutron emission average TKEs for the three target isotopes ^235,238U and ²³⁹Pu has been performed, and incorporated into ENDF/B-VIII.0.