G4hPairProduction.cc

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// $Id$
//
// -------------------------------------------------------------------
//
// GEANT4 Class file
//
//
// File name:     G4hPairProduction
//
// Author:        Vladimir Ivanchenko on base of model for muons
//
// Creation date: 01.03.2008
//
// Modifications:
//
//
// -------------------------------------------------------------------
//
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#include "G4hPairProduction.hh"
#include "G4SystemOfUnits.hh"
#include "G4Electron.hh"
#include "G4Positron.hh"
#include "G4hPairProductionModel.hh"
#include "G4UniversalFluctuation.hh"
 
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using namespace std;
 
G4hPairProduction::G4hPairProduction(const G4String& name)
  : G4VEnergyLossProcess(name),
    theParticle(0),
    theBaseParticle(0),
    lowestKinEnergy(1.*GeV),
    isInitialised(false)
{
  SetProcessSubType(fPairProdByCharged);
  SetSecondaryParticle(G4Positron::Positron());
  SetIonisation(false);
}
 
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G4hPairProduction::~G4hPairProduction()
{}
 
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G4bool G4hPairProduction::IsApplicable(const G4ParticleDefinition& p)
{
  return (p.GetPDGCharge() != 0.0 && p.GetPDGMass() > 110.0*MeV);
}
 
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G4double G4hPairProduction::MinPrimaryEnergy(const G4ParticleDefinition*,
                         const G4Material*,
                         G4double)
{
  return lowestKinEnergy;
}
 
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void G4hPairProduction::InitialiseEnergyLossProcess(
                         const G4ParticleDefinition* part,
             const G4ParticleDefinition*)
{
  if (!isInitialised) {
    isInitialised = true;
 
    theParticle = part;
    if (!EmModel()) { SetEmModel(new G4hPairProductionModel()); }
 
    G4VEmFluctuationModel* fm = 0;
    EmModel()->SetLowEnergyLimit(MinKinEnergy());
    EmModel()->SetHighEnergyLimit(MaxKinEnergy());
    AddEmModel(1, EmModel(), fm);
  }
}
 
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void G4hPairProduction::PrintInfo()
{}
 
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