G4eIonisation.cc

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// -------------------------------------------------------------------
//
// GEANT4 Class file
//
//
// File name:     G4eIonisation
//
// Author:        Laszlo Urban
//
// Creation date: 20.03.1997
//
// Modified by Michel Maire and Vladimir Ivanchenko
//
// -------------------------------------------------------------------
//
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#include "G4eIonisation.hh"
#include "G4Electron.hh"
#include "G4MollerBhabhaModel.hh"
#include "G4EmParameters.hh"
#include "G4EmStandUtil.hh"
 
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G4eIonisation::G4eIonisation(const G4String& name)
  : G4VEnergyLossProcess(name),
    theElectron(G4Electron::Electron()),
    isElectron(true),
    isInitialised(false)
{
  SetProcessSubType(fIonisation);
  SetSecondaryParticle(theElectron);
}
 
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G4eIonisation::~G4eIonisation() = default;
 
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G4double G4eIonisation::MinPrimaryEnergy(const G4ParticleDefinition*,
                     const G4Material*,
                     G4double cut)
{
  G4double x = cut;
  if(isElectron) x += cut;
  return x;
}
 
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G4bool G4eIonisation::IsApplicable(const G4ParticleDefinition& p)
{
  return (&p == theElectron || &p == G4Positron::Positron());
}
 
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void G4eIonisation::InitialiseEnergyLossProcess(
            const G4ParticleDefinition* part,
            const G4ParticleDefinition*)
{
  if(!isInitialised) {
    if(part != theElectron) { isElectron = false; }
    if (nullptr == EmModel(0)) { SetEmModel(new G4MollerBhabhaModel()); }
    G4EmParameters* param = G4EmParameters::Instance();
    EmModel(0)->SetLowEnergyLimit(param->MinKinEnergy());
    EmModel(0)->SetHighEnergyLimit(param->MaxKinEnergy());
    if (nullptr == FluctModel()) {
      SetFluctModel(G4EmStandUtil::ModelOfFluctuations());
    }
    AddEmModel(1, EmModel(), FluctModel());
    isInitialised = true;
  }
}
 
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void G4eIonisation::ProcessDescription(std::ostream& out) const
{
  out << "  Ionisation";
  G4VEnergyLossProcess::ProcessDescription(out);
}
 
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