Hello, I’m simulating the interaction between thermal neutron and Cd-113 and there should be an obvious 558keV gamma peak in the spectrum created by the deexcitation of Cd-114, a product of the interaction. However, I can’t see it anymore even after I increased the thickness of Cd-113 to 1.5 cm. The physics list I use is FTFP_BERT_HP with Neutron HP Thermal Scattering. The energy of neutron source is 0.0253 eV. I don’t know what I should do to get a right result. Could you help me?
Here, a run of example Hadr03.
The physics constructor is FTFP_BERT_HP (see PhysicsList.cc)
Do not forget to set USE_ONLY_PHOTON_EVAPORATION = true
Sorry for this late reply. I tried YuX.mac.txt you sent in example Hadr03, but the result is not satisfying. Could you please tell me where to set USE_ONLY_PHOTON_EVAPORATION = true and the meaning of this order? It will be better if you can also lead me to somewhere I am able to learn it by myself. Thank you very much.Processing: root screenshot.bmp…
ParticleHP package uses several environment variables to define physics options.
USE_ONLY_PHOTON_EVAPORATION force ParticleHP to use PhotonEvaporation data set instead of its own deexcitation scheme.
I am unable to give a detailed description of all env variables (maybe in Geant4 doc ? …)
A list of env variables pertinent for users is included in examples hadronic :
- in Geant4 10.6 and earlier, see envHadronic.sh (or .csh)
- in Geant4 10.7, env variables have been replaced by C++ statements to be put in the main; see Hadr03.cc
Thank you for your friendly help! I’ve seen the 558 keV peak in the spectrum after setting USE_ONLY_PHOTON_EVAPORATION = true.
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