Hi Paolo,
I will answer your geant3 related questions:
The default hadronic package is defined by guhadr in the guser
subdirectory. This routime 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 GHEISHA only if IHADR<3 (default)
C
IF (IHADR.NE.4) THEN
CALL GHEISH
ELSE
CALL FLUFIN
ENDIF
END
In Geant3, the tables in kinetic energy were defined in the range
[10 keV, 10 TeV]. Gheisha (based on parametrisation of experimental
data in the range of a 10 MeV up to about 200 GeV). Above this 200 Gev,
there is a simple linear extrapolation of the parametrisation.
Concerning the old Fluka in geant3, I suggest to read the comments
in routine guhadr of the file guhadr.F in the attachement.
Rene Brun
On Thu, 23 Oct 2003, paolo
maestro wrote:
>
> Hi Ivana,
>
> I would like to ask you some questions about the physics processes
>
> that are built by the method BuildPhysics of class TVirtualMC.
>
> - If I use VMC with geant3.21, which package for hadronic showers
> description is used as default?
>
> Gheisha or Fluka? Which is the maximum momentum for primary particles I
> can run?
>
> - Currently different physics lists (for calorimetry, medical and
> military application, shielding etc..)
>
> are provided by geant4 depending on the kind of problem one wants to
> address.
>
> If I use VMC with geant4, how can I specify a particular list i.e. link
>
> to my program a particular physics list library ?
>
> - I'm interested in doing some simulations of a transition radiation
> detector. Can I use
>
> the VMC for that? I mean, reading the geant3.21 manual it seems to me
> that
>
> processes for transition radiation are not implemented. Is this right?
>
> In geant4 a G4TransitionRadiation class exists, but how can I link it
> to the VMC application?
>
> Thanks in advance for your help.
>
> Best regards
>
> Paolo Maestro
>
> **************************
> Paolo Maestro
> University of Siena-INFN
> ++39-050-2214349
> **************************
>
>
>
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