G4ElectroVDNuclearModel Class Reference

#include <G4ElectroVDNuclearModel.hh>

Inheritance diagram for G4ElectroVDNuclearModel:

Collaboration diagram for G4ElectroVDNuclearModel:

Public Member Functions
	G4ElectroVDNuclearModel ()
	~G4ElectroVDNuclearModel ()
G4HadFinalState *	ApplyYourself (const G4HadProjectile &aTrack, G4Nucleus &aTargetNucleus)
virtual void	ModelDescription (std::ostream &outFile) const
Public Member Functions inherited from G4HadronicInteraction
	G4HadronicInteraction (const G4String &modelName="HadronicModel")
virtual	~G4HadronicInteraction ()
virtual G4double	SampleInvariantT (const G4ParticleDefinition *p, G4double plab, G4int Z, G4int A)
virtual G4bool	IsApplicable (const G4HadProjectile &aTrack, G4Nucleus &targetNucleus)
G4double	GetMinEnergy () const
G4double	GetMinEnergy (const G4Material *aMaterial, const G4Element *anElement) const
void	SetMinEnergy (G4double anEnergy)
void	SetMinEnergy (G4double anEnergy, const G4Element *anElement)
void	SetMinEnergy (G4double anEnergy, const G4Material *aMaterial)
G4double	GetMaxEnergy () const
G4double	GetMaxEnergy (const G4Material *aMaterial, const G4Element *anElement) const
void	SetMaxEnergy (const G4double anEnergy)
void	SetMaxEnergy (G4double anEnergy, const G4Element *anElement)
void	SetMaxEnergy (G4double anEnergy, const G4Material *aMaterial)
G4int	GetVerboseLevel () const
void	SetVerboseLevel (G4int value)
const G4String &	GetModelName () const
void	DeActivateFor (const G4Material *aMaterial)
void	ActivateFor (const G4Material *aMaterial)
void	DeActivateFor (const G4Element *anElement)
void	ActivateFor (const G4Element *anElement)
G4bool	IsBlocked (const G4Material *aMaterial) const
G4bool	IsBlocked (const G4Element *anElement) const
void	SetRecoilEnergyThreshold (G4double val)
G4double	GetRecoilEnergyThreshold () const
virtual const std::pair < G4double, G4double >	GetFatalEnergyCheckLevels () const
virtual std::pair< G4double, G4double >	GetEnergyMomentumCheckLevels () const
void	SetEnergyMomentumCheckLevels (G4double relativeLevel, G4double absoluteLevel)
virtual void	BuildPhysicsTable (const G4ParticleDefinition &)
virtual void	InitialiseModel ()

Additional Inherited Members
Protected Member Functions inherited from G4HadronicInteraction
void	SetModelName (const G4String &nam)
G4bool	IsBlocked () const
void	Block ()
Protected Attributes inherited from G4HadronicInteraction
G4HadFinalState	theParticleChange
G4int	verboseLevel
G4double	theMinEnergy
G4double	theMaxEnergy
G4bool	isBlocked

Detailed Description

Definition at line 50 of file G4ElectroVDNuclearModel.hh.

Constructor & Destructor Documentation

G4ElectroVDNuclearModel::G4ElectroVDNuclearModel

(

)

Definition at line 63 of file G4ElectroVDNuclearModel.cc.

 : G4HadronicInteraction("G4ElectroVDNuclearModel"),
   leptonKE(0.0), photonEnergy(0.0), photonQ2(0.0)
{
  SetMinEnergy(0.0);
  SetMaxEnergy(1*PeV);
  electroXS = 
    (G4ElectroNuclearCrossSection*)G4CrossSectionDataSetRegistry::Instance()->
    GetCrossSectionDataSet(G4ElectroNuclearCrossSection::Default_Name());
  gammaXS = 
    (G4PhotoNuclearCrossSection*)G4CrossSectionDataSetRegistry::Instance()->
    GetCrossSectionDataSet(G4PhotoNuclearCrossSection::Default_Name());

  // reuse existing pre-compound model
  G4GeneratorPrecompoundInterface* precoInterface 
    = new G4GeneratorPrecompoundInterface();
  G4HadronicInteraction* p =
    G4HadronicInteractionRegistry::Instance()->FindModel("PRECO");
  G4VPreCompoundModel* pre = static_cast<G4VPreCompoundModel*>(p);
  if(!pre) { pre = new G4PreCompoundModel(); }
  precoInterface->SetDeExcitation(pre);

  // string model
  ftfp = new G4TheoFSGenerator();
  ftfp->SetTransport(precoInterface);
  theFragmentation = new G4LundStringFragmentation();
  theStringDecay = new G4ExcitedStringDecay(theFragmentation);
  G4FTFModel* theStringModel = new G4FTFModel();
  theStringModel->SetFragmentationModel(theStringDecay);
  ftfp->SetHighEnergyGenerator(theStringModel);
    
  // Build Bertini model
  bert = new G4CascadeInterface();
}

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G4ElectroVDNuclearModel::~G4ElectroVDNuclearModel

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)

Definition at line 98 of file G4ElectroVDNuclearModel.cc.

{
  delete theFragmentation;
  delete theStringDecay;
}

Member Function Documentation

G4HadFinalState * G4ElectroVDNuclearModel::ApplyYourself ( const G4HadProjectile &  aTrack, G4Nucleus &  aTargetNucleus  )

virtual

Implements G4HadronicInteraction.

Definition at line 120 of file G4ElectroVDNuclearModel.cc.

{
    // Set up default particle change (just returns initial state)
    theParticleChange.Clear();
    theParticleChange.SetStatusChange(isAlive);
    leptonKE = aTrack.GetKineticEnergy();
    theParticleChange.SetEnergyChange(leptonKE);
    theParticleChange.SetMomentumChange(aTrack.Get4Momentum().vect().unit() );
    
    // Set up sanity checks for real photon production
    G4DynamicParticle lepton(aTrack.GetDefinition(), aTrack.Get4Momentum() );
    
    // Need to call GetElementCrossSection before calling GetEquivalentPhotonEnergy.
    G4Material* mat = 0;
    G4int targZ = targetNucleus.GetZ_asInt();
    electroXS->GetElementCrossSection(&lepton, targZ, mat);
    
    photonEnergy = electroXS->GetEquivalentPhotonEnergy();
    // Photon energy cannot exceed lepton energy
    if (photonEnergy < leptonKE) {
        photonQ2 = electroXS->GetEquivalentPhotonQ2(photonEnergy);
        G4double dM = G4Proton::Proton()->GetPDGMass() + G4Neutron::Neutron()->GetPDGMass();
        // Photon
        if (photonEnergy > photonQ2/dM) {
            // Produce recoil lepton and transferred photon
            G4DynamicParticle* transferredPhoton = CalculateEMVertex(aTrack, targetNucleus);
            // Interact gamma with nucleus
            if (transferredPhoton) CalculateHadronicVertex(transferredPhoton, targetNucleus);
        }
    }
    return &theParticleChange;
}

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void G4ElectroVDNuclearModel::ModelDescription ( std::ostream &  outFile ) const

virtual

Reimplemented from G4HadronicInteraction.

Definition at line 104 of file G4ElectroVDNuclearModel.cc.

{
  outFile << "G4ElectroVDNuclearModel handles the inelastic scattering\n"
          << "of e- and e+ from nuclei using the equivalent photon\n"
          << "approximation in which the incoming lepton generates a\n"
          << "virtual photon at the electromagnetic vertex, and the\n"
          << "virtual photon is converted to a real photon.  At low\n"
          << "energies, the photon interacts directly with the nucleus\n"
          << "using the Bertini cascade.  At high energies the photon\n"
          << "is converted to a pi0 which interacts using the FTFP\n"
          << "model.  The electro- and gamma-nuclear cross sections of\n"
          << "M. Kossov are used to generate the virtual photon spectrum\n";
}

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The documentation for this class was generated from the following files:

• geant4.10.03.p01/source/processes/hadronic/models/lepto_nuclear/include/G4ElectroVDNuclearModel.hh
• geant4.10.03.p01/source/processes/hadronic/models/lepto_nuclear/src/G4ElectroVDNuclearModel.cc