Gerry Hale sent Anna new cross section tables. These are larger by factor of 2 since the cross section was measured using neutrons from only one decay channel of 9Li, and also includes a resonance that was previously thought to be wrong. Here are the same plots as in the post from Mar 27th. You can click on any plot to make it larger.
This plot is the cumulative ratio.
This plot is the ratio of the rates.
I have also plotted the signal and the control separately. Here is the rate of signal (generation of Be9):
And here is the rate of the control:
Finally the cumulative measures for Be9 (signal) and Al (control), individually:
The take home message, most easily seen in the Be9 rate plot, is that with the new cross sections there is more Be9 being produced, especially around peak burn time. Incidentally, there is also a new density/pressure model in the cold fuel (see the previous blog post for details) which is affecting these results through minor differences in the burn. However, it is likely that the change in the cross section is what is driving the more efficient production of Be9.
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