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Question G4 vs FLUKA at MeV energies 

Forum: Physics List
Date: 02 Mar, 2010
From: Daniel Egger <Daniel Egger>

Dear Geant4 users,

I'm trying to compare a Geant4 simulation with a FLUKA one. In both codes, the geometry is a cube of either Graphite, Stainless Steel or Tungsten into which a monoenergetic pencil beam of electrons is sent. The beam energy is either 5 MeV, 50 MeV or 200 MeV.

The results show that the higher the energy and the Z of the material the more the two codes tend to disagree. The worst case is 200 MeV e- into a Tungsten bloc.

I've attached a .pdf with the energy deposition profiles in the target (G4 is the blue curve that tends to spread out more transversely) as well as the physics list. I can't figure out what is the source of the problem. Any ideas?

Best regards, Daniel

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2010/03/02/22.52-96440-pg_0009.pdf
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2010/03/02/22.52-40197-G4vsFlukaPhysicsList.cc

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1 None: Re: G4 vs FLUKA at MeV energies   (Colin Paul Gloster - 03 Mar, 2010)
2 Idea: Re: G4 vs FLUKA at MeV energies   (Vladimir Ivanchenko - 04 Mar, 2010)
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