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Forum: Hadronic Processes
Re: Question G4PreCompoundModel deexcitation (Mikhail)
Re: Idea Re: G4PreCompoundModel deexcitation (Vladimir Ivanchenko)
Date: 14 Feb, 2013
From: michel maire <michel maire>

On Tue, 12 Feb 2013 08:43:02 GMT, Vladimir Ivanchenko wrote:
> Hello,
> 
> PreCompound model is used by the Binary cascade for simulation of light
> ions and neutron emission at pre-equilibrium stage of the cascade code.
> It is used by the BinaryCascade or BertiniCascade but not assumed to be
> used as a cascade generator itself (even if it has the same interface
> allowing to do so). LEParameterized models cannot provide any reasonable
> result on event by event base.
> 
> Also it is known that the Bertini cascade is very approximate at low
> energies.
> 
> So, the main choice is the Binary cascade. You also need to be careful
> what cross section of inelastic interaction is used. Physics List to
> choose may be QGSP_BIC, FTFP_BIC, QBBC.
> 
> Alternative cascades may have better accuracy for bit higher energies
> are QMD and INCL++, which in the recent release available with Shielding
> and QGSP_INCLXX Physics Lists.
> 
> VI
> 

 example Hadr03, with QBBC physicsConstructor and macro below.
 log file in attachement.
 #
 /testhadr/det/setIsotopeMat Be9 4 9 1.85 g/cm3
 /testhadr/det/setSize 100 m 
 #
 /run/initialize
 #
 /gun/particle proton
 /gun/energy 10 MeV
 #
 /process/list
 /process/inactivate hadElastic
 #
 /run/beamOn 100000

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2013/02/14/10.41-65456-Be9.log.txt

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