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Geant4 Version: 11.3.2
Operating System: Windows11
Compiler/Version: VS2022
CMake Version: Cmake 4.0.3
Hi,
I’m using GEANT4 to simulate photonuclear reactions with weak cross sections, for example, the 51V(gamma, alpha)47Sc reaction. I am relatively new to G4, so I conducted some research on physics models and processes. I’m using the FTFB_BERT physics list. I found out that the model used in this energy range (<200 MeV) is based on the de-excitation module (precompound models, evaporation models, etc.). For the cross sections, all hadronic gamma interaction cross sections are supplied by G4PhotoNuclearCrossSection, which is used at all gamma energies.
My question is the following. Where do the data and physical models used by G4 in this case come from? I understand that websites such as TENDL23 use prediction models such as TALYS, based on a list of parameters that are updated and improved as more experimental data becomes available. These parameters come from a global fit of experimental data, so more data means better model predictions. Do G4’s physical models work in the same way?
Thanks.