when i use geant4, mcnp6,fluka,phits to calculate a same case, the different results occur:
the result from geant4 is: 0.16 using G4NDL4.6, 0.15 using Endf/B7.1
the result from fluka is:0.016
the result from mcnp6 is:0.02
the result from phits is:0.02
it is obvious that geant4 produce bigger result than others.
To help in answering the question, could you let use know which versions of Geant4, MCNP, etc are being used please? Also, what exactly is/are the quantity(quantities) you are scoring and comparing against?