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FLUKA:4-5.1
Flair:3.4-5
Description
Dear FLUKA experts,
I would like to ask for your help regarding the calculation of positron-emitting isotope yields using RESNUCLEi, and a discrepancy I observe when comparing my results with published literature obtained using GATE.
My goal is to obtain the relative yields of positron-emitting nuclei produced by a 12C ion beam irradiating a PMMA target.
Using RESNUCLEi scored in the entire PMMA target region, I extract the isotope yields from the Residual nuclei distribution (A\Z table) and normalize each positron emitter to the sum of all β⁺ emitters. My results are:
Nucl Yield Percent (β+)
11C 5.94e-02 80.05 %
15O 6.32e-03 8.52 %
10C 3.24e-03 4.37 %
8B 2.55e-03 3.44 %
13N 1.35e-03 1.82 %
12N 5.04e-04 0.68 %
9C 4.05e-04 0.55 %
17F 2.69e-04 0.36 %
14O 1.70e-04 0.23 %However, published results obtained with GATE (see attached figure) show that the yield fraction of 8B is very small.
From a physical point of view, 8B is not expected to contribute such a large fraction, therefore I believe my result is likely incorrect, but I am not able to identify the source of the discrepancy.I have attached my FLUKA input file for reference. I would greatly appreciate your help in understanding:
whether my procedure for extracting positron-emitter yields from RESNUCLEi is correct, and
what could cause the discrepancy of nuclide yield, such as 8B and 14O compared to GATE and literature results as followed:
Positron emitter Half-life Yield (%) Fraction of total yield (%) 11C 20 min 13.437 71.14 10C 19 s 1.681 8.9 15O 173.6 s 2.375 12.57 14O 91 s 0.359 1.9 13N 10 min 0.806 4.27 12N 11 ms 0.213 1.13 8B 770 ms 0.017 0.09
Thank you very much for your time and help.
Best regards,
Yang
A002.inp (4.3 KB)