|Message: Re: How does GEANT4 handle scintillation caused by protons?||Not Logged In (login)|
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> Considering the source to be 1 MeV protons, should I set up by: > > 1. providing the empirical ScintillationYield value for protons to the > material properties table of the sensing medium, or > > 2. provide the ScintillationYield value for electrons/gamma-rays to the > material properties table and expect GEANT to properly account for the > energy transfer from energetic protons to electrons?
During the G4 step-wise simulation of a proton in the scintillator, the proton will deposit energy to the medium - GetTotalEnergyDeposit() - and it may generate explicit secondaries (electrons and gammas) depending on the 'production threshold' you've set.
If you know the non-linear scintillation yield for all the particles involved you can set:
and provide PROTONSCINTILLATIONYIELD and ELECTRONSCINTILLATIONYIELD
For further information, you can consult the Application Developers Manual and the paper:
Article title: Simulating response functions and pulse shape discrimination for organic scintillation detectors with Geant4 First author: Zachary S. Hartwig Nuclear Inst. and Methods in Physics Research, A 737C (2014), pp. 155-162
If you are contend with assuming a linear and equal response of your scintillator to charged particles then you can provide one scintillation yield as a function of deposited energy. If the EM shower is contained in the scintillator volume then your result also doesn't depend on your 'production cuts'.