#include <G4eCoulombScatteringModel.hh>

Inheritance diagram for G4eCoulombScatteringModel:

Collaboration diagram for G4eCoulombScatteringModel:

Public Member Functions
	G4eCoulombScatteringModel (G4bool combined=true)

virtual	~G4eCoulombScatteringModel ()

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

virtual void	InitialiseLocal (const G4ParticleDefinition , G4VEmModel masterModel)

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)

virtual G4double	MinPrimaryEnergy (const G4Material , const G4ParticleDefinition , G4double)

void	SetLowEnergyThreshold (G4double val)

void	SetRecoilThreshold (G4double eth)

void	SetFixedCut (G4double)

G4double	GetFixedCut () const

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

virtual	~G4VEmModel ()

virtual void	InitialiseForMaterial (const G4ParticleDefinition , const G4Material )

virtual void	InitialiseForElement (const G4ParticleDefinition *, G4int Z)

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	GetPartialCrossSection (const G4Material , G4int, const G4ParticleDefinition , G4double)

virtual G4double	ComputeCrossSectionPerShell (const G4ParticleDefinition *, G4int Z, G4int shellIdx, G4double kinEnergy, 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	MinEnergyCut (const G4ParticleDefinition , const G4MaterialCutsCouple )

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

virtual void	DefineForRegion (const G4Region *)

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

void	InitialiseElementSelectors (const G4ParticleDefinition *, const G4DataVector &)

std::vector< G4EmElementSelector * > *	GetElementSelectors ()

void	SetElementSelectors (std::vector< G4EmElementSelector > )

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)

G4int	SelectRandomAtomNumber (const G4Material *)

void	SetParticleChange (G4VParticleChange , G4VEmFluctuationModel f=0)

void	SetCrossSectionTable (G4PhysicsTable *, G4bool isLocal)

G4ElementData *	GetElementData ()

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

G4bool	UseAngularGeneratorFlag () const

void	SetAngularGeneratorFlag (G4bool)

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	SetForceBuildTable (G4bool val)

void	SetMasterThread (G4bool val)

G4bool	IsMaster () const

G4double	MaxSecondaryKinEnergy (const G4DynamicParticle *dynParticle)

const G4String &	GetName () const

void	SetCurrentCouple (const G4MaterialCutsCouple *)

const G4Element *	GetCurrentElement () const

const G4Isotope *	GetCurrentIsotope () const

G4bool	IsLocked () const

void	SetLocked (G4bool)

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 *)

Private Member Functions
G4eCoulombScatteringModel &	operator= (const G4eCoulombScatteringModel &right)

	G4eCoulombScatteringModel (const G4eCoulombScatteringModel &)

Private Attributes
G4IonTable *	theIonTable

G4ParticleChangeForGamma *	fParticleChange

G4WentzelOKandVIxSection *	wokvi

G4NistManager *	fNistManager

const std::vector< G4double > *	pCuts

const G4MaterialCutsCouple *	currentCouple

const G4Material *	currentMaterial

G4int	currentMaterialIndex

G4double	cosThetaMin

G4double	cosThetaMax

G4double	recoilThreshold

G4double	elecRatio

G4double	mass

G4double	fixedCut

const G4ParticleDefinition *	particle

const G4ParticleDefinition *	theProton

G4bool	isCombined

Additional Inherited Members
Protected Attributes inherited from G4VEmModel
G4ElementData *	fElementData

G4VParticleChange *	pParticleChange

G4PhysicsTable *	xSectionTable

const std::vector< G4double > *	theDensityFactor

const std::vector< G4int > *	theDensityIdx

size_t	idxTable

Static Protected Attributes inherited from G4VEmModel
static const G4double	inveplus = 1.0/CLHEP::eplus

Detailed Description

Definition at line 78 of file G4eCoulombScatteringModel.hh.

Constructor & Destructor Documentation

◆ G4eCoulombScatteringModel() [1/2]

G4eCoulombScatteringModel::G4eCoulombScatteringModel ( G4bool combined = true )

Definition at line 80 of file G4eCoulombScatteringModel.cc.

   : G4VEmModel("eCoulombScattering"),
     cosThetaMin(1.0),
     cosThetaMax(-1.0),
     isCombined(combined)
 {
   fParticleChange = 0;
   fNistManager = G4NistManager::Instance();
   theIonTable  = G4ParticleTable::GetParticleTable()->GetIonTable();
   theProton    = G4Proton::Proton();
   currentMaterial = 0; 
   fixedCut = -1.0;
 
   pCuts = 0;
 
   recoilThreshold = 0.*keV; // by default does not work
 
   particle = 0;
   currentCouple = 0;
   wokvi = new G4WentzelOKandVIxSection(combined);
 
   currentMaterialIndex = 0;
   mass = proton_mass_c2;
   elecRatio = 0.0;
 }

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◆ ~G4eCoulombScatteringModel()

G4eCoulombScatteringModel::~G4eCoulombScatteringModel ( )

virtual

Definition at line 108 of file G4eCoulombScatteringModel.cc.

 {
   delete wokvi;
 }

◆ G4eCoulombScatteringModel() [2/2]

G4eCoulombScatteringModel::G4eCoulombScatteringModel ( const G4eCoulombScatteringModel & )

private

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 191 of file G4eCoulombScatteringModel.cc.

 {
   //G4cout << "### G4eCoulombScatteringModel::ComputeCrossSectionPerAtom  for " 
   //<< p->GetParticleName()<<" Z= "<<Z<<" e(MeV)= "<< kinEnergy/MeV << G4endl; 
   G4double cross = 0.0;
   elecRatio = 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());
   G4double costmin = wokvi->SetupKinematic(kinEnergy, currentMaterial);
   if(cosThetaMax < costmin) {
     G4int iz = G4int(Z);
     G4double cut = cutEnergy;
     if(fixedCut > 0.0) { cut = fixedCut; }
     costmin = wokvi->SetupTarget(iz, cut);
     G4double costmax = cosThetaMax; 
     if(iz == 1 && costmax < 0.0 && particle == theProton) { 
       costmax = 0.0; 
     }
     if(costmin > costmax) {
       cross = wokvi->ComputeNuclearCrossSection(costmin, costmax)
     + wokvi->ComputeElectronCrossSection(costmin, costmax);
     }
     /*  
   if(p->GetParticleName() == "mu+") 
   G4cout << "e(MeV)= " << kinEnergy/MeV << " cross(b)= " << cross/barn  
      << " 1-costmin= " << 1-costmin
      << " 1-costmax= " << 1-costmax
      << " 1-cosThetaMax= " << 1-cosThetaMax
      << G4endl;
     */
   }
   return cross;  
 }

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◆ DefineMaterial()

void G4eCoulombScatteringModel::DefineMaterial ( const G4MaterialCutsCouple * cup )

inlineprotected

Definition at line 165 of file G4eCoulombScatteringModel.hh.

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

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◆ GetFixedCut()

G4double G4eCoulombScatteringModel::GetFixedCut ( ) const

inline

Definition at line 203 of file G4eCoulombScatteringModel.hh.

 {
   return fixedCut;
 }

◆ Initialise()

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

virtual

Implements G4VEmModel.

Definition at line 115 of file G4eCoulombScatteringModel.cc.

 {
   SetupParticle(part);
   currentCouple = 0;
 
   if(isCombined) {
     cosThetaMin = 1.0;
     G4double tet = PolarAngleLimit();
     if(tet >= pi)      { cosThetaMin = -1.0; }
     else if(tet > 0.0) { cosThetaMin = cos(tet); }
   }
 
   wokvi->Initialise(part, cosThetaMin);
   /*
   G4cout << "G4eCoulombScatteringModel: " << particle->GetParticleName()
          << "  1-cos(ThetaLimit)= " << 1 - cosThetaMin
      << "  cos(thetaMax)= " <<  cosThetaMax
      << G4endl;
   */
   pCuts = &cuts;
   //G4ProductionCutsTable::GetProductionCutsTable()->GetEnergyCutsVector(3);
   /*
   G4cout << "!!! G4eCoulombScatteringModel::Initialise for " 
      << part->GetParticleName() << "  cos(TetMin)= " << cosThetaMin 
      << "  cos(TetMax)= " << cosThetaMax <<G4endl;
   G4cout << "cut= " << (*pCuts)[0] << "  cut1= " << (*pCuts)[1] << G4endl;
   */
   if(!fParticleChange) {
     fParticleChange = GetParticleChangeForGamma();
   }
   if(IsMaster() && mass < GeV && part->GetParticleName() != "GenericIon") {
     InitialiseElementSelectors(part,cuts);
   }
 }

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◆ InitialiseLocal()

void G4eCoulombScatteringModel::InitialiseLocal	(	const G4ParticleDefinition *	,
		G4VEmModel *	masterModel
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 153 of file G4eCoulombScatteringModel.cc.

 {
   SetElementSelectors(masterModel->GetElementSelectors());
 }

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◆ MinPrimaryEnergy()

G4double G4eCoulombScatteringModel::MinPrimaryEnergy	(	const G4Material *	material,
		const G4ParticleDefinition *	part,
		G4double
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 162 of file G4eCoulombScatteringModel.cc.

 {
   SetupParticle(part);
 
   // define cut using cuts for proton
   G4double cut = 
     std::max(recoilThreshold, (*pCuts)[CurrentCouple()->GetIndex()]);
 
   // find out lightest element
   const G4ElementVector* theElementVector = material->GetElementVector();
   G4int nelm = material->GetNumberOfElements();
 
   // select lightest element
   G4int Z = 300;
   for (G4int j=0; j<nelm; ++j) {        
     G4int iz = G4lrint((*theElementVector)[j]->GetZ());
     if(iz < Z) { Z = iz; }
   }
   G4int A = G4lrint(fNistManager->GetAtomicMassAmu(Z));
   G4double targetMass = G4NucleiProperties::GetNuclearMass(A, Z);
   G4double t = std::max(cut, 0.5*(cut + sqrt(2*cut*targetMass)));
 
   return t;
 }

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◆ operator=()

G4eCoulombScatteringModel& G4eCoulombScatteringModel::operator= ( const G4eCoulombScatteringModel & right )

private

◆ SampleSecondaries()

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

virtual

Implements G4VEmModel.

Definition at line 234 of file G4eCoulombScatteringModel.cc.

 {
   G4double kinEnergy = dp->GetKineticEnergy();
   SetupParticle(dp->GetDefinition());
   DefineMaterial(couple);
   /*
   G4cout << "G4eCoulombScatteringModel::SampleSecondaries e(MeV)= " 
      << kinEnergy << "  " << particle->GetParticleName() 
      << " cut= " << cutEnergy<< G4endl;
   */
   // Choose nucleus
   G4double cut = cutEnergy;
   if(fixedCut > 0.0) { cut = fixedCut; }
 
   wokvi->SetupKinematic(kinEnergy, currentMaterial);
 
   const G4Element* currentElement = 
     SelectRandomAtom(couple,particle,kinEnergy,cut,kinEnergy);
 
   G4double Z = currentElement->GetZ();
   G4int iz = G4int(Z);
 
   G4double costmin = wokvi->SetupTarget(iz, cut);
   G4double costmax = cosThetaMax; 
   if(iz == 1 && costmax < 0.0 && particle == theProton) { 
     costmax = 0.0; 
   }
 
   if(costmin > costmax) {
     G4double cross = wokvi->ComputeNuclearCrossSection(costmin, costmax);
     G4double ecross = wokvi->ComputeElectronCrossSection(costmin, costmax);
     G4double ratio = ecross/(cross + ecross);
 
     G4int ia = SelectIsotopeNumber(currentElement);
     G4double targetMass = G4NucleiProperties::GetNuclearMass(ia, iz);
     wokvi->SetTargetMass(targetMass);
 
     G4ThreeVector newDirection = 
       wokvi->SampleSingleScattering(costmin, costmax, ratio);
     G4double cost = newDirection.z();
     /*
       G4cout << "SampleSec: e(MeV)= " << kinEnergy/MeV   
              << " 1-costmin= " << 1-costmin
              << " 1-costmax= " << 1-costmax
              << " 1-cost= " << 1-cost
              << " ratio= " << ratio
              << G4endl;
     */
     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));
 
     // the check likely not needed
     if(trec > kinEnergy) { trec = kinEnergy; }
     G4double finalT = kinEnergy - trec; 
     G4double edep = 0.0;
     /*
     G4cout<<"G4eCoulombScatteringModel: finalT= "<<finalT<<" Trec= "
       <<trec << " Z= " << iz << " A= " << ia
       << " tcut(keV)= " << (*pCuts)[currentMaterialIndex]/keV << G4endl;
     */
     G4double tcut = recoilThreshold;
     if(pCuts) { tcut= std::max(tcut,(*pCuts)[currentMaterialIndex]); }
 
     if(trec > tcut) {
       G4ParticleDefinition* ion = theIonTable->GetIon(iz, ia, 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 {
       edep = trec;
       fParticleChange->ProposeNonIonizingEnergyDeposit(edep);
     }
 
     // finelize primary energy and energy balance
     // this threshold may be applied only because for low-enegry
     // e+e- msc model is applied
     if(finalT < 0.0) { 
       edep += finalT;  
       finalT = 0.0;
       if(edep < 0.0) { edep = 0.0; }
     } 
     fParticleChange->SetProposedKineticEnergy(finalT);
     fParticleChange->ProposeLocalEnergyDeposit(edep);
   }
 }

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◆ SetFixedCut()

void G4eCoulombScatteringModel::SetFixedCut ( G4double val )

inline

Definition at line 196 of file G4eCoulombScatteringModel.hh.

 {
   fixedCut = val;
 }

◆ SetLowEnergyThreshold()

void G4eCoulombScatteringModel::SetLowEnergyThreshold ( G4double val )

inline

◆ SetRecoilThreshold()

void G4eCoulombScatteringModel::SetRecoilThreshold ( G4double eth )

inline

Definition at line 189 of file G4eCoulombScatteringModel.hh.

 {
   recoilThreshold = eth;
 }

◆ SetupParticle()

void G4eCoulombScatteringModel::SetupParticle ( const G4ParticleDefinition * p )

inlineprotected

Definition at line 177 of file G4eCoulombScatteringModel.hh.

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