#include <G4hCoulombScatteringModel.hh>

Inheritance diagram for G4hCoulombScatteringModel:

Collaboration diagram for G4hCoulombScatteringModel:

Public Member Functions
	G4hCoulombScatteringModel (G4bool combined=true)

virtual	~G4hCoulombScatteringModel ()

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

virtual void	InitialiseLocal (const G4ParticleDefinition , G4VEmModel masterModel) override

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

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

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

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 level, const G4ParticleDefinition , G4double kineticEnergy)

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 * > *)

virtual 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=nullptr)

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 *)

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 67 of file G4hCoulombScatteringModel.hh.

Constructor & Destructor Documentation

G4hCoulombScatteringModel::G4hCoulombScatteringModel ( G4bool combined = true )

explicit

Definition at line 70 of file G4hCoulombScatteringModel.cc.

   : G4VEmModel("hCoulombScattering"),
     cosThetaMin(1.0),
     cosThetaMax(-1.0),
     isCombined(combined)
 {
   fParticleChange = nullptr;
   fNistManager = G4NistManager::Instance();
   theIonTable  = G4ParticleTable::GetParticleTable()->GetIonTable();
   theProton    = G4Proton::Proton();
   currentMaterial = nullptr; 
   fixedCut = -1.0;
 
   pCuts = 0;
 
   recoilThreshold = 0.*CLHEP::keV; // by default does not work
 
   particle = nullptr;
   currentCouple = nullptr;
   wokvi = new G4WentzelVIRelXSection(combined);
 
   currentMaterialIndex = 0;
   mass = CLHEP::proton_mass_c2;
   elecRatio = 0.0;
 }

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G4hCoulombScatteringModel::~G4hCoulombScatteringModel ( )

virtual

Definition at line 98 of file G4hCoulombScatteringModel.cc.

 {
   delete wokvi;
 }

Member Function Documentation

G4double G4hCoulombScatteringModel::ComputeCrossSectionPerAtom	(	const G4ParticleDefinition *	p,
		G4double	kinEnergy,
		G4double	Z,
		G4double	A,
		G4double	cut,
		G4double	emax
	)

overridevirtual

Reimplemented from G4VEmModel.

Definition at line 181 of file G4hCoulombScatteringModel.cc.

 {
   //G4cout << "### G4hCoulombScatteringModel::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());
 
   G4int iz = G4int(Z);
   G4double tmass = proton_mass_c2;
   if(1 < iz) {
     tmass = fNistManager->GetAtomicMassAmu(iz)*amu_c2;
   }
   G4double costmin = 
     wokvi->SetupKinematic(kinEnergy, currentMaterial, cutEnergy, tmass);
   if(cosThetaMax < costmin) {
     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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void G4hCoulombScatteringModel::DefineMaterial ( const G4MaterialCutsCouple * cup )

inlineprotected

Definition at line 154 of file G4hCoulombScatteringModel.hh.

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

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G4double G4hCoulombScatteringModel::GetFixedCut ( ) const

inline

Definition at line 192 of file G4hCoulombScatteringModel.hh.

 {
   return fixedCut;
 }

void G4hCoulombScatteringModel::Initialise	(	const G4ParticleDefinition *	part,
		const G4DataVector &	cuts
	)

overridevirtual

Implements G4VEmModel.

Definition at line 105 of file G4hCoulombScatteringModel.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 << "G4hCoulombScatteringModel: " << particle->GetParticleName()
          << "  1-cos(ThetaLimit)= " << 1 - cosThetaMin
      << "  cos(thetaMax)= " <<  cosThetaMax
      << G4endl;
   */
   pCuts = &cuts;
   //G4ProductionCutsTable::GetProductionCutsTable()->GetEnergyCutsVector(3);
   /*
   G4cout << "!!! G4hCoulombScatteringModel::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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void G4hCoulombScatteringModel::InitialiseLocal	(	const G4ParticleDefinition *	,
		G4VEmModel *	masterModel
	)

overridevirtual

Reimplemented from G4VEmModel.

Definition at line 143 of file G4hCoulombScatteringModel.cc.

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

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G4double G4hCoulombScatteringModel::MinPrimaryEnergy	(	const G4Material *	material,
		const G4ParticleDefinition *	part,
		G4double
	)

finalvirtual

Reimplemented from G4VEmModel.

Definition at line 152 of file G4hCoulombScatteringModel.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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void G4hCoulombScatteringModel::SampleSecondaries	(	std::vector< G4DynamicParticle * > *	fvect,
		const G4MaterialCutsCouple *	couple,
		const G4DynamicParticle *	dp,
		G4double	tmin,
		G4double	maxEnergy
	)

overridevirtual

Implements G4VEmModel.

Definition at line 230 of file G4hCoulombScatteringModel.cc.

 {
   G4double kinEnergy = dp->GetKineticEnergy();
   SetupParticle(dp->GetDefinition());
   DefineMaterial(couple);
 
   // Choose nucleus
   const G4Element* elm = SelectRandomAtom(couple,particle,
                       kinEnergy,cutEnergy,kinEnergy);
 
   G4int iz = elm->GetZasInt();
   G4int ia = SelectIsotopeNumber(elm);
   G4double mass2 = G4NucleiProperties::GetNuclearMass(ia, iz);
 
   wokvi->SetupKinematic(kinEnergy, currentMaterial, cutEnergy, mass2);
   G4double costmin = wokvi->SetupTarget(iz, cutEnergy);
   G4double costmax = cosThetaMax; 
   if(iz == 1 && costmax < 0.0 && particle == theProton) { 
     costmax = 0.0; 
   }
  
   if(costmin <= costmax) { return; }
   G4double cross = wokvi->ComputeNuclearCrossSection(costmin, costmax);
   G4double ecross = wokvi->ComputeElectronCrossSection(costmin, costmax);
   G4double ratio = ecross/(cross + ecross);
 
   G4ThreeVector newDirection = 
     wokvi->SampleSingleScattering(costmin, costmax, ratio);
 
   // kinematics in the Lab system
   G4double ptot = dp->GetTotalMomentum();
   G4double e1   = dp->GetTotalEnergy();
   
   // Lab. system kinematics along projectile direction
   G4LorentzVector v0 = G4LorentzVector(0, 0, ptot, e1 + mass2);
   G4double bet  = ptot/v0.e();
   G4double gam  = 1.0/sqrt((1.0 - bet)*(1.0 + bet));
 
   // CM projectile
   G4double momCM = gam*(ptot - bet*e1); 
   G4double eCM   = gam*(e1 - bet*ptot); 
   // energy & momentum after scattering of incident particle
   G4double pxCM = momCM*newDirection.x();
   G4double pyCM = momCM*newDirection.y();
   G4double pzCM = momCM*newDirection.z();
 
   // CM--->Lab
   G4LorentzVector v1(pxCM , pyCM, gam*(pzCM + bet*eCM), gam*(eCM + bet*pzCM));
 
   G4ThreeVector dir = dp->GetMomentumDirection(); 
   newDirection = v1.vect().unit();
   newDirection.rotateUz(dir);   
   
   fParticleChange->ProposeMomentumDirection(newDirection);   
   
   // recoil
   v0 -= v1; 
   G4double trec = v0.e() - mass2;
   G4double edep = 0.0;
 
   G4double tcut = recoilThreshold;
   if(pCuts) { 
     tcut= std::max(tcut,(*pCuts)[currentMaterialIndex]); 
     //G4cout<<" tcut eV "<<tcut/eV<<endl;
   }
  
   if(trec > tcut) {
     G4ParticleDefinition* ion = theIonTable->GetIon(iz, ia, 0);
     newDirection = v0.vect().unit();
     newDirection.rotateUz(dir);   
     G4DynamicParticle* newdp = new G4DynamicParticle(ion, newDirection, trec);
     fvect->push_back(newdp);
   } else if(trec > 0.0) {
     edep = trec;
     fParticleChange->ProposeNonIonizingEnergyDeposit(edep);
   }
 
   // finelize primary energy and energy balance
   G4double finalT = v1.e() - mass;
   if(finalT < 0.0) { 
     edep += finalT;
     finalT = 0.0;
   } 
   edep = std::max(edep, 0.0);
   fParticleChange->SetProposedKineticEnergy(finalT);
   fParticleChange->ProposeLocalEnergyDeposit(edep);
 }

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void G4hCoulombScatteringModel::SetFixedCut ( G4double val )

inline

Definition at line 185 of file G4hCoulombScatteringModel.hh.

 {
   fixedCut = val;
 }

void G4hCoulombScatteringModel::SetLowEnergyThreshold ( G4double val )

inline

void G4hCoulombScatteringModel::SetRecoilThreshold ( G4double eth )

inline

Definition at line 178 of file G4hCoulombScatteringModel.hh.

 {
   recoilThreshold = eth;
 }

void G4hCoulombScatteringModel::SetupParticle ( const G4ParticleDefinition * p )

inlineprotected

Definition at line 166 of file G4hCoulombScatteringModel.hh.

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

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

geant4.10.03.p01/source/processes/electromagnetic/standard/include/G4hCoulombScatteringModel.hh
geant4.10.03.p01/source/processes/electromagnetic/standard/src/G4hCoulombScatteringModel.cc

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation