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_Geant4 Version:_11.01.p03
_Operating System:_Sonoma
Compiler/Version:
_CMake Version:_3.28.3
Dear Geant4 Users,
I hope you are all doing well.
I have a question regarding the appropriate PhysicsList for simulating high-energy gamma interactions with metals (e.g., lead), particularly for studying the production of secondary neutrons.
I have searched the forum, but I am still uncertain about the most suitable PhysicsList for this purpose. Below is a simple simulation where a 20 MeV gamma particle is incident on lead (cyan), and I am checking whether secondary neutrons reach the scoring box (red).
When using the commonly recommended “G4HadronPhysicsQGSP_BIC”, no neutrons are produced. However, when I use “GammaNuclearPhysics(“gamma”)”, I can observe neutron production, as shown in the attached image.
Energy, Particle name, Process name
So, my main question is:
- What is the most appropriate Physics List for accurately simulating secondary neutron production from high-energy gamma interactions with metals?
- Am I missing any important considerations regarding the Physics List selection?
I would appreciate any insights or recommendations from experienced users.