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Keywords: No Model found for Hadronic Interaction using G4EnergyRangeManager
Forum: Hadronic Processes
Re: Question No Model found for Hadronic Interaction using G4EnergyRangeManager (Stephanie Hickford)
Date: 08 Nov, 2006
From: Dennis H. Wright <Dennis H. Wright>

Hi Stephanie,

   The QGS model used in the QGSP physics list called from N04 has an
upper limit of 100 TeV, but only for p,n,pi,K.  For particles like
anti-Lambda, the QGSP phsyics list uses the high energy parameterized
model (HEP) which has a default upper limit of 10 TeV, hence your
problem.  Due to a lack of data for such particles at this energy, the 
model has not been validated, so the 10 TeV limit is just an educated 
guess.  Since anti-lambdas and such are unlikely to be important in
your application, you could just extend the upper limit of the HEP
model which would prevent your simulation from crashing.  This is 
really the only option because Geant4 has no other models which apply
to these particles.
   To change the upper limit, you need to modify some code in the 
physics_list/hadronic/Packaging directory in your copy of the Geant4
toolkit.  
  To change the limit for anti-Lambdas add the line:

theHEAntiLambdaModel->SetMaxEnergy(100*TeV);

to the file G4MiscLHEPBuilder.cc
Repeat this for other particles which may pop up as well, like 
anti-Sigmas, etc.  Then compile and re-build the physics lists.
   

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1 None: Re: No Model found for Hadronic Interaction using G4EnergyRangeManager   (Stephanie Hickford - 14 Nov, 2006)
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