|Message: Re: FORCED PHOTONS INTERACTION||Not Logged In (login)|
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User Francisco wrote:
>> I am studying deposition of energy in a detector of about 20 microns. In >> order to increase my statistics and decrease my computing time I need to >> force photons to interact. I am following the approach of Rogers and >> Bielajew. Could someone tell me how I can implement it by changing the >> mean free path or cross section? Can this approach be implemented in >> Geant4 4.8.3? Is this the best way to do it?
Do I understand correctly : the incident particle is photon, and its energy is such that Compton interaction is dominant ?
If so, there is an example of biased Compton interaction in examples/extended/medical/fanoCavity (see README)
In Geant4, each process has one or several models attached to it : by default, G4KleinNishinaCompton model is attached to G4ComptonScattering process.
In this example, MyKleinNishinaCompton model inherites from G4KleinNishina, and a multiplicative factor is applied to CrossSectionPerVolume.
MyKleinNishinaCompton model is assigned to G4ComptonScattering in PhysicsList.cc
I hope this can help, Michel
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