I’m running a relatively simple simulation consisting of a point source and a spherical surface for scoring with USRBDX. Apart from that, the geometry is completely empty (no air). The idea is to check the emission probability for different radionuclides.
In the attached figures you can compare the emission probabilites given by ENDF-B/VIII.0 and the ones I’m obtaining with FLUKA. The energies are correct, but the probabilities are a factor 1e6 times bigger in FLUKA for the discrete electrons.
What could be the reason for this discrepancy?
Please find attached the input file for your convenience.
I have had a look at our decay radiation products database for 99Tc and can confirm that it contains too large branchings for Auger and XR associated with 99Tc decay.
We will correct the existing erroneous branchings for the upcoming minor release, however the 0.0016% secondary beta decay and corresponding gamma line are not present, and will not be added.
We are instead working on a major overhaul of the decay radiation database to solve all these little data issues, but that won’t be ready in the immediate future.