Fission Product Yield Data for the Transmutation of Minor Actinide ...

FIG. 4.2.24. Number of protons emitted before fission.
4.2.3.7. Evaluation of systematic model estimates
of yields
FI and FC yields were calculated using
Gaussian parameters derived from the systematic
model functions in Tables 4.2.2 and 4.2.3 and
compared to experimental values as ratios of the
two for several fission reactions. Some ratios are
plotted in Figs 4.2.25–4.2.28. These figures show that
the ratios cluster about 1.0, as they should, but that
a number deviate considerably from 1.0, especially
for the lower experimental FI, FC values (50 MeV protons):
(1) Many FI values fall above the curves as shown
in Fig 4.2.30(a), contrary to the requirement
that the sum of FI at unit intervals of A¢ be 1.0.
FIG. 4.2.25. Ratios of Sys. F1 to Expt. F1 for U235T.
FIG. 4.2.26. Ratios of Sys. F1 to Expt. F1 for CF249T.
FIG. 4.2.27. Ratios of Sys. F1 to Expt. F1 for U238H.
Compensation for this behaviour can be
achieved by normalizing the experimental
independent yield data (IN, %) so that the
sum for each element (Rb or Cs) equals the
sum from the model.
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