CZT or Cd-113 with thermal neutrons

Please fill out the following information to help in answering your question, and also see tips for posting code snippets. If you don’t provide this information it will take more time to help with your problem!

_Geant4 Version:_v11.2.2
_Operating System:_Windows
Compiler/Version:
_CMake Version:_3.23.5

Hi, I am having difficulty simulating thermal neutrons hitting my CZT detector. I am very new to geant4 (less than a week) and I have been trying to analyzed my data using ROOT and here is what I got. I also attached here my Physics list. Not sure if it is an overkill to list this much. Thank you! I know for case of low energy neutrons (thermal), i need to use G4HadronPhysicsQGSP_BERT_HP
but I listed a lot of Physics. Pls kindly help. thank you!
PhysicsList.cc (968 Bytes)