Hi, in a previous mail I asked which is the default hadronic package used by geant3 and this was the answer: Rene Brun wrote: > Hi Paolo > I will answer your geant3 related questions: > the default hadronic package is defined by guhadr in the guser > subdirectory. This routine calls Gheisha. you can redefine this routine > to call Fluka instead. For example in the gexam4 example, we have > SUBROUTINE GUHADR > #include <gcphys.h> > C > C > C GHEISHA only if IHADR<3 (default) > > IF(IHADR.NE.4) THEN > CALL GHEISH > ELSE > CALL FLUFIN > ENDIF > END This is clear to me if I use fortran code or I run geant3 from ROOT. But if I use VMC how can I call Fluka? Is there some option I can set to switch from Gheisha to Fluka (for instance: IHADR=4 has already this effect?) or this requires to modify some code in the BuildPhysics method of TVirtualMC? I would have also another question: does the method TrackTime() of TVirtualMC class give the time of a certain track calculated in the laboratory frame and starting from t=0 corresponding to the primary particle generation? Thanks. Best regards Paolo
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