#include <G4eCoulombScatteringModel.hh>

Inheritance diagram for G4eCoulombScatteringModel:

Public Member Functions
	G4eCoulombScatteringModel (const G4String &nam="eCoulombScattering")

virtual	~G4eCoulombScatteringModel ()

virtual void	Initialise (const G4ParticleDefinition *, const G4DataVector &)

virtual G4double	ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double kinEnergy, G4double Z, G4double A, G4double cut, G4double emax)

virtual void	SampleSecondaries (std::vector< G4DynamicParticle * > , const G4MaterialCutsCouple , const G4DynamicParticle *, G4double tmin, G4double maxEnergy)

void	SetLowEnergyThreshold (G4double val)

void	SetRecoilThreshold (G4double eth)

Public Member Functions inherited from G4VEmModel
	G4VEmModel (const G4String &nam)

virtual	~G4VEmModel ()

virtual void	Initialise (const G4ParticleDefinition *, const G4DataVector &)=0

virtual void	SampleSecondaries (std::vector< G4DynamicParticle * > , const G4MaterialCutsCouple , const G4DynamicParticle *, G4double tmin=0.0, G4double tmax=DBL_MAX)=0

virtual G4double	ComputeDEDXPerVolume (const G4Material , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy=DBL_MAX)

virtual G4double	CrossSectionPerVolume (const G4Material , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

virtual G4double	ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double kinEnergy, G4double Z, G4double A=0., G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

virtual G4double	ChargeSquareRatio (const G4Track &)

virtual G4double	GetChargeSquareRatio (const G4ParticleDefinition , const G4Material , G4double kineticEnergy)

virtual G4double	GetParticleCharge (const G4ParticleDefinition , const G4Material , G4double kineticEnergy)

virtual void	StartTracking (G4Track *)

virtual void	CorrectionsAlongStep (const G4MaterialCutsCouple , const G4DynamicParticle , G4double &eloss, G4double &niel, G4double length)

virtual G4double	Value (const G4MaterialCutsCouple , const G4ParticleDefinition , G4double kineticEnergy)

virtual G4double	MinPrimaryEnergy (const G4Material , const G4ParticleDefinition )

virtual void	SetupForMaterial (const G4ParticleDefinition , const G4Material , G4double kineticEnergy)

virtual void	DefineForRegion (const G4Region *)

void	InitialiseElementSelectors (const G4ParticleDefinition *, const G4DataVector &)

G4double	ComputeDEDX (const G4MaterialCutsCouple , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy=DBL_MAX)

G4double	CrossSection (const G4MaterialCutsCouple , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

G4double	ComputeMeanFreePath (const G4ParticleDefinition , G4double kineticEnergy, const G4Material , G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

G4double	ComputeCrossSectionPerAtom (const G4ParticleDefinition , const G4Element , G4double kinEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

G4int	SelectIsotopeNumber (const G4Element *)

const G4Element *	SelectRandomAtom (const G4MaterialCutsCouple , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

const G4Element *	SelectRandomAtom (const G4Material , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

void	SetParticleChange (G4VParticleChange , G4VEmFluctuationModel f=0)

void	SetCrossSectionTable (G4PhysicsTable *)

G4PhysicsTable *	GetCrossSectionTable ()

G4VEmFluctuationModel *	GetModelOfFluctuations ()

G4VEmAngularDistribution *	GetAngularDistribution ()

void	SetAngularDistribution (G4VEmAngularDistribution *)

G4double	HighEnergyLimit () const

G4double	LowEnergyLimit () const

G4double	HighEnergyActivationLimit () const

G4double	LowEnergyActivationLimit () const

G4double	PolarAngleLimit () const

G4double	SecondaryThreshold () const

G4bool	LPMFlag () const

G4bool	DeexcitationFlag () const

G4bool	ForceBuildTableFlag () const

void	SetHighEnergyLimit (G4double)

void	SetLowEnergyLimit (G4double)

void	SetActivationHighEnergyLimit (G4double)

void	SetActivationLowEnergyLimit (G4double)

G4bool	IsActive (G4double kinEnergy)

void	SetPolarAngleLimit (G4double)

void	SetSecondaryThreshold (G4double)

void	SetLPMFlag (G4bool val)

void	SetDeexcitationFlag (G4bool val)

void	ForceBuildTable (G4bool val)

G4double	MaxSecondaryKinEnergy (const G4DynamicParticle *dynParticle)

const G4String &	GetName () const

void	SetCurrentCouple (const G4MaterialCutsCouple *)

const G4Element *	GetCurrentElement () const

Protected Member Functions
void	DefineMaterial (const G4MaterialCutsCouple *)

void	SetupParticle (const G4ParticleDefinition *)

Protected Member Functions inherited from G4VEmModel
G4ParticleChangeForLoss *	GetParticleChangeForLoss ()

G4ParticleChangeForGamma *	GetParticleChangeForGamma ()

virtual G4double	MaxSecondaryEnergy (const G4ParticleDefinition *, G4double kineticEnergy)

const G4MaterialCutsCouple *	CurrentCouple () const

void	SetCurrentElement (const G4Element *)

Protected Attributes
G4ParticleTable *	theParticleTable

G4ParticleChangeForGamma *	fParticleChange

G4WentzelOKandVIxSection *	wokvi

G4NistManager *	fNistManager

const std::vector< G4double > *	pCuts

const G4MaterialCutsCouple *	currentCouple

const G4Material *	currentMaterial

G4int	currentMaterialIndex

G4double	cosThetaMin

G4double	cosThetaMax

G4double	cosTetMinNuc

G4double	cosTetMaxNuc

G4double	recoilThreshold

G4double	elecRatio

G4double	mass

const G4ParticleDefinition *	particle

const G4ParticleDefinition *	theProton

G4double	lowEnergyThreshold

Protected Attributes inherited from G4VEmModel
G4VParticleChange *	pParticleChange

G4PhysicsTable *	xSectionTable

const std::vector< G4double > *	theDensityFactor

const std::vector< G4int > *	theDensityIdx

Detailed Description

Definition at line 78 of file G4eCoulombScatteringModel.hh.

Constructor & Destructor Documentation

◆ G4eCoulombScatteringModel()

G4eCoulombScatteringModel::G4eCoulombScatteringModel ( const G4String & nam = "eCoulombScattering" )

Definition at line 79 of file G4eCoulombScatteringModel.cc.

  : G4VEmModel(nam),
    cosThetaMin(1.0),
    cosThetaMax(-1.0),
    isInitialised(false)
{
  fParticleChange = 0;
  fNistManager = G4NistManager::Instance();
  theParticleTable = G4ParticleTable::GetParticleTable();
  theProton   = G4Proton::Proton();
  currentMaterial = 0; 
 
  pCuts = 0;
 
  lowEnergyThreshold = 1*keV;  // particle will be killed for lower energy
  recoilThreshold = 0.*keV; // by default does not work
 
  particle = 0;
  currentCouple = 0;
  wokvi = new G4WentzelOKandVIxSection();
 
  currentMaterialIndex = 0;
 
  cosTetMinNuc = 1.0;
  cosTetMaxNuc = -1.0;
  elecRatio = 0.0;
  mass = proton_mass_c2;
}

◆ ~G4eCoulombScatteringModel()

G4eCoulombScatteringModel::~G4eCoulombScatteringModel ( )

virtual

Definition at line 110 of file G4eCoulombScatteringModel.cc.

{
  delete wokvi;
}

Member Function Documentation

◆ ComputeCrossSectionPerAtom()

G4double G4eCoulombScatteringModel::ComputeCrossSectionPerAtom	(	const G4ParticleDefinition *	p,
		G4double	kinEnergy,
		G4double	Z,
		G4double	A,
		G4double	cut,
		G4double	emax
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 148 of file G4eCoulombScatteringModel.cc.

{
  //G4cout << "### G4eCoulombScatteringModel::ComputeCrossSectionPerAtom  for " 
  //  << p->GetParticleName()<<" Z= "<<Z<<" e(MeV)= "<< kinEnergy/MeV << G4endl; 
  G4double cross = 0.0;
  if(p != particle) { SetupParticle(p); }
 
  // cross section is set to zero to avoid problems in sample secondary
  if(kinEnergy <= 0.0) { return cross; }
  DefineMaterial(CurrentCouple());
  cosTetMinNuc = wokvi->SetupKinematic(kinEnergy, currentMaterial);
  if(cosThetaMax < cosTetMinNuc) {
    G4int iz = G4int(Z);
    cosTetMinNuc = wokvi->SetupTarget(iz, cutEnergy);
    cosTetMaxNuc = cosThetaMax; 
    if(iz == 1 && cosTetMaxNuc < 0.0 && particle == theProton) { 
      cosTetMaxNuc = 0.0; 
    }
    cross =  wokvi->ComputeNuclearCrossSection(cosTetMinNuc, cosTetMaxNuc);
    elecRatio = wokvi->ComputeElectronCrossSection(cosTetMinNuc, cosThetaMax);
    cross += elecRatio;
    if(cross > 0.0) { elecRatio /= cross; }  
  }
  /*
  if(p->GetParticleName() == "e-") 
  G4cout << "e(MeV)= " << kinEnergy/MeV << " cross(b)= " << cross/barn  
     << " 1-cosTetMinNuc= " << 1-cosTetMinNuc
     << " 1-cosTetMaxNuc= " << 1-cosTetMaxNuc
     << G4endl;
  */
  return cross;  
}

Referenced by SampleSecondaries().

◆ DefineMaterial()

void G4eCoulombScatteringModel::DefineMaterial ( const G4MaterialCutsCouple * cup )

inlineprotected

Definition at line 156 of file G4eCoulombScatteringModel.hh.

{ 
  if(cup != currentCouple) {
    currentCouple = cup;
    currentMaterial = cup->GetMaterial();
    currentMaterialIndex = currentCouple->GetIndex(); 
  }
}

Referenced by ComputeCrossSectionPerAtom(), and SampleSecondaries().

◆ Initialise()

void G4eCoulombScatteringModel::Initialise	(	const G4ParticleDefinition *	p,
		const G4DataVector &	cuts
	)

virtual

Implements G4VEmModel.

Definition at line 117 of file G4eCoulombScatteringModel.cc.

{
  SetupParticle(p);
  currentCouple = 0;
  cosThetaMin = cos(PolarAngleLimit());
  wokvi->Initialise(p, cosThetaMin);
  /*    
  G4cout << "G4eCoulombScatteringModel: " << particle->GetParticleName()
         << "  1-cos(ThetaLimit)= " << 1 - cosThetaMin
     << "  cos(thetaMax)= " <<  cosThetaMax
     << G4endl;
  */
  pCuts = G4ProductionCutsTable::GetProductionCutsTable()->GetEnergyCutsVector(3);
  /*
  G4cout << "!!! G4eCoulombScatteringModel::Initialise for " 
     << p->GetParticleName() << "  cos(TetMin)= " << cosThetaMin 
     << "  cos(TetMax)= " << cosThetaMax <<G4endl;
  G4cout << "cut0= " << cuts[0] << "  cut1= " << cuts[1] << G4endl;
  */
  if(!isInitialised) {
    isInitialised = true;
    fParticleChange = GetParticleChangeForGamma();
  }
  if(mass < GeV) {
    InitialiseElementSelectors(p,cuts);
  }
}

◆ SampleSecondaries()

void G4eCoulombScatteringModel::SampleSecondaries	(	std::vector< G4DynamicParticle * > *	fvect,
		const G4MaterialCutsCouple *	couple,
		const G4DynamicParticle *	dp,
		G4double	tmin,
		G4double	maxEnergy
	)

virtual

Implements G4VEmModel.

Definition at line 187 of file G4eCoulombScatteringModel.cc.

{
  G4double kinEnergy = dp->GetKineticEnergy();
 
  // absorb particle below low-energy limit to avoid situation
  // when a particle has no energy loss
  if(kinEnergy < lowEnergyThreshold) { 
    fParticleChange->SetProposedKineticEnergy(0.0);
    fParticleChange->ProposeLocalEnergyDeposit(kinEnergy);
    fParticleChange->ProposeNonIonizingEnergyDeposit(kinEnergy);
    return; 
  }
  SetupParticle(dp->GetDefinition());
  DefineMaterial(couple);
  /*
  G4cout << "G4eCoulombScatteringModel::SampleSecondaries e(MeV)= " 
     << kinEnergy << "  " << particle->GetParticleName() 
     << " cut= " << cutEnergy<< G4endl;
  */
  // Choose nucleus
  const G4Element* currentElement = 
    SelectRandomAtom(couple,particle,kinEnergy,cutEnergy,kinEnergy);
 
  G4double Z = currentElement->GetZ();
 
  if(ComputeCrossSectionPerAtom(particle,kinEnergy, Z,
                kinEnergy, cutEnergy, kinEnergy) == 0.0) 
    { return; }
 
  G4int iz = G4int(Z);
  G4int ia = SelectIsotopeNumber(currentElement);
  G4double targetMass = G4NucleiProperties::GetNuclearMass(ia, iz);
  wokvi->SetTargetMass(targetMass);
 
  G4ThreeVector newDirection = 
    wokvi->SampleSingleScattering(cosTetMinNuc, cosThetaMax, elecRatio);
  G4double cost = newDirection.z();
 
  G4ThreeVector direction = dp->GetMomentumDirection(); 
  newDirection.rotateUz(direction);   
 
  fParticleChange->ProposeMomentumDirection(newDirection);   
 
  // recoil sampling assuming a small recoil
  // and first order correction to primary 4-momentum
  G4double mom2 = wokvi->GetMomentumSquare();
  G4double trec = mom2*(1.0 - cost)/(targetMass + (mass + kinEnergy)*(1.0 - cost));
  G4double finalT = kinEnergy - trec; 
  //G4cout<<"G4eCoulombScatteringModel: finalT= "<<finalT<<" Trec= "<<trec<<G4endl;
  if(finalT <= lowEnergyThreshold) { 
    trec = kinEnergy;  
    finalT = 0.0;
  } 
 
  fParticleChange->SetProposedKineticEnergy(finalT);
  G4double tcut = recoilThreshold;
  if(pCuts) { tcut= std::max(tcut,(*pCuts)[currentMaterialIndex]); }
 
  if(trec > tcut) {
    G4ParticleDefinition* ion = theParticleTable->GetIon(iz, ia, 0.0);
    G4ThreeVector dir = (direction*sqrt(mom2) - 
             newDirection*sqrt(finalT*(2*mass + finalT))).unit();
    G4DynamicParticle* newdp = new G4DynamicParticle(ion, dir, trec);
    fvect->push_back(newdp);
  } else {
    fParticleChange->ProposeLocalEnergyDeposit(trec);
    fParticleChange->ProposeNonIonizingEnergyDeposit(trec);
  }
 
  return;
}

◆ SetLowEnergyThreshold()

void G4eCoulombScatteringModel::SetLowEnergyThreshold ( G4double val )

inline

Definition at line 180 of file G4eCoulombScatteringModel.hh.

{
  lowEnergyThreshold = val;
}

◆ SetRecoilThreshold()

void G4eCoulombScatteringModel::SetRecoilThreshold ( G4double eth )

inline

Definition at line 187 of file G4eCoulombScatteringModel.hh.

{
  recoilThreshold = eth;
}

◆ SetupParticle()

void G4eCoulombScatteringModel::SetupParticle ( const G4ParticleDefinition * p )

inlineprotected

Definition at line 168 of file G4eCoulombScatteringModel.hh.

{
  // Initialise mass and charge
  if(p != particle) {
    particle = p;
    mass = particle->GetPDGMass();
    wokvi->SetupParticle(p);
  }
}

Referenced by ComputeCrossSectionPerAtom(), Initialise(), and SampleSecondaries().

Member Data Documentation

◆ cosTetMaxNuc

G4double G4eCoulombScatteringModel::cosTetMaxNuc

protected

Definition at line 137 of file G4eCoulombScatteringModel.hh.

Referenced by ComputeCrossSectionPerAtom(), and G4eCoulombScatteringModel().

◆ cosTetMinNuc

G4double G4eCoulombScatteringModel::cosTetMinNuc

protected

Definition at line 136 of file G4eCoulombScatteringModel.hh.

Referenced by ComputeCrossSectionPerAtom(), G4eCoulombScatteringModel(), and SampleSecondaries().

◆ cosThetaMax

G4double G4eCoulombScatteringModel::cosThetaMax

protected

Definition at line 135 of file G4eCoulombScatteringModel.hh.

Referenced by ComputeCrossSectionPerAtom(), and SampleSecondaries().

◆ cosThetaMin

G4double G4eCoulombScatteringModel::cosThetaMin

protected

Definition at line 134 of file G4eCoulombScatteringModel.hh.

Referenced by Initialise().

◆ currentCouple

const G4MaterialCutsCouple* G4eCoulombScatteringModel::currentCouple

protected

Definition at line 130 of file G4eCoulombScatteringModel.hh.

Referenced by DefineMaterial(), G4eCoulombScatteringModel(), and Initialise().

◆ currentMaterial

const G4Material* G4eCoulombScatteringModel::currentMaterial

protected

Definition at line 131 of file G4eCoulombScatteringModel.hh.

Referenced by ComputeCrossSectionPerAtom(), DefineMaterial(), and G4eCoulombScatteringModel().

◆ currentMaterialIndex

G4int G4eCoulombScatteringModel::currentMaterialIndex

protected

Definition at line 132 of file G4eCoulombScatteringModel.hh.

Referenced by DefineMaterial(), G4eCoulombScatteringModel(), and SampleSecondaries().

◆ elecRatio

G4double G4eCoulombScatteringModel::elecRatio

protected

Definition at line 139 of file G4eCoulombScatteringModel.hh.

Referenced by ComputeCrossSectionPerAtom(), G4eCoulombScatteringModel(), and SampleSecondaries().

◆ fNistManager

G4NistManager* G4eCoulombScatteringModel::fNistManager

protected

Definition at line 126 of file G4eCoulombScatteringModel.hh.

Referenced by G4eCoulombScatteringModel().

◆ fParticleChange

G4ParticleChangeForGamma* G4eCoulombScatteringModel::fParticleChange

protected

Definition at line 124 of file G4eCoulombScatteringModel.hh.

Referenced by G4eCoulombScatteringModel(), Initialise(), and SampleSecondaries().

◆ lowEnergyThreshold

G4double G4eCoulombScatteringModel::lowEnergyThreshold

protected

Definition at line 146 of file G4eCoulombScatteringModel.hh.

Referenced by G4eCoulombScatteringModel(), SampleSecondaries(), and SetLowEnergyThreshold().

◆ mass

G4double G4eCoulombScatteringModel::mass

protected

Definition at line 140 of file G4eCoulombScatteringModel.hh.

Referenced by G4eCoulombScatteringModel(), Initialise(), SampleSecondaries(), and SetupParticle().

◆ particle

const G4ParticleDefinition* G4eCoulombScatteringModel::particle

protected

Definition at line 143 of file G4eCoulombScatteringModel.hh.

Referenced by ComputeCrossSectionPerAtom(), G4eCoulombScatteringModel(), SampleSecondaries(), and SetupParticle().

◆ pCuts

const std::vector<G4double>* G4eCoulombScatteringModel::pCuts

protected

Definition at line 128 of file G4eCoulombScatteringModel.hh.

Referenced by G4eCoulombScatteringModel(), Initialise(), and SampleSecondaries().

◆ recoilThreshold

G4double G4eCoulombScatteringModel::recoilThreshold

protected

Definition at line 138 of file G4eCoulombScatteringModel.hh.

Referenced by G4eCoulombScatteringModel(), SampleSecondaries(), and SetRecoilThreshold().

◆ theParticleTable

G4ParticleTable* G4eCoulombScatteringModel::theParticleTable

protected

Definition at line 123 of file G4eCoulombScatteringModel.hh.

Referenced by G4eCoulombScatteringModel(), and SampleSecondaries().

◆ theProton

const G4ParticleDefinition* G4eCoulombScatteringModel::theProton

protected

Definition at line 144 of file G4eCoulombScatteringModel.hh.

Referenced by ComputeCrossSectionPerAtom(), and G4eCoulombScatteringModel().

◆ wokvi

G4WentzelOKandVIxSection* G4eCoulombScatteringModel::wokvi

protected

Definition at line 125 of file G4eCoulombScatteringModel.hh.

Referenced by ComputeCrossSectionPerAtom(), G4eCoulombScatteringModel(), Initialise(), SampleSecondaries(), SetupParticle(), and ~G4eCoulombScatteringModel().

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

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ G4eCoulombScatteringModel()

◆ ~G4eCoulombScatteringModel()

Member Function Documentation

◆ ComputeCrossSectionPerAtom()

◆ DefineMaterial()

◆ Initialise()

◆ SampleSecondaries()

◆ SetLowEnergyThreshold()

◆ SetRecoilThreshold()

◆ SetupParticle()

Member Data Documentation

◆ cosTetMaxNuc

◆ cosTetMinNuc

◆ cosThetaMax

◆ cosThetaMin

◆ currentCouple

◆ currentMaterial

◆ currentMaterialIndex

◆ elecRatio

◆ fNistManager

◆ fParticleChange

◆ lowEnergyThreshold

◆ mass

◆ particle

◆ pCuts

◆ recoilThreshold

◆ theParticleTable

◆ theProton

◆ wokvi