|Message: Neutron Physics in 9.3.p02 vs. 9.4.p01||Not Logged In (login)|
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Some time ago, I created a very simple simulation to study an iron neutron shield for a DAR neutrino beam. I recently upgraded my geant4 installation from 9.3.p02 to 9.4.p01, and I noticed that given a fixed number of neutrons injected as primary particles, vastly more secondary neutrons are produced and eventually capture with 9.3.p02 than in 9.4.p01.
After reviewing the changelog between the two versions I still do not understand the source of the difference. As I am not truly an expert in geant4 development, I am curious whether there is someone who may have an idea of what is causing this issue. My best guess is that the problem originates from some change to the low-energy neutron physics models being used. For reference, I have attached my physics list.
Thanks for any guidance you can provide.
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