G4hPairProduction.cc

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// -------------------------------------------------------------------
//
// 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 "G4hPairProductionModel.hh"
#include "G4EmParameters.hh"
 
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using namespace std;
 
G4hPairProduction::G4hPairProduction(const G4String& name)
  : G4MuPairProduction(name)
{}
 
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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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void G4hPairProduction::InitialiseEnergyLossProcess(
                         const G4ParticleDefinition* part,
             const G4ParticleDefinition*)
{
  if (!isInitialised) {
    isInitialised = true;
 
    theParticle = part;
    if (!EmModel()) { SetEmModel(new G4hPairProductionModel(part)); }
 
    G4double limit = part->GetPDGMass()*8.;
    if(limit > lowestKinEnergy) { lowestKinEnergy = limit; }
 
    G4VEmFluctuationModel* fm = nullptr;
    G4EmParameters* param = G4EmParameters::Instance();
    EmModel()->SetLowEnergyLimit(param->MinKinEnergy());
    EmModel()->SetHighEnergyLimit(param->MaxKinEnergy());
    EmModel()->SetSecondaryThreshold(param->MuHadBremsstrahlungTh());
    AddEmModel(1, EmModel(), fm);
  }
}
 
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void G4hPairProduction::ProcessDescription(std::ostream& out) const
{
  out << "  Hadron pair production";
  G4VEnergyLossProcess::ProcessDescription(out);
}
 
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