An empirical formula for the average number of fission neutrons

Empirical Formulas for Estimation of Fission Prompt Neutron Multiplicity for Actinide Nuclides

“…(Figure 13) Cm-244: The evaluation of ν -(E n ) in JENDL-3.3 was obtained by Howerton's method. ENDF/B-VI also adopted Howerton's method but the value was renormalized to the thermal value computed from semi-empirical work of Gordeeva and Smirenkin 35 as revised by Manero and Konshin. 36 The evaluation of JEFF-3.0 was taken from KEDAK-4 13 but the details of the method are not known.…”

“…However, Zhuravlev's thermal data is exceptionally high among curium isotopes. ENDF/B-VI adopted a thermal value computed from semi-empirical work of Gordeeva and Smirenkin 35 as revised by Manero and Konshin, 36 together with the energy dependence of Howerton. The present evaluation gives values lower than any of the existing evaluations.…”