#include <G4eeToHadronsModel.hh>

Inheritance diagram for G4eeToHadronsModel:

Collaboration diagram for G4eeToHadronsModel:

Public Member Functions
	G4eeToHadronsModel (G4Vee2hadrons *, G4int ver=0, const G4String &nam="eeToHadrons")

virtual	~G4eeToHadronsModel ()

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

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

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

virtual G4double	ComputeCrossSectionPerElectron (const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

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

G4DynamicParticle *	GenerateCMPhoton (G4double)

G4double	PeakEnergy () const

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

virtual	~G4VEmModel ()

virtual void	InitialiseLocal (const G4ParticleDefinition , G4VEmModel masterModel)

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	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	MinPrimaryEnergy (const G4Material , const G4ParticleDefinition , G4double cut=0.0)

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)

Private Member Functions
void	ComputeCMCrossSectionPerElectron ()

G4eeToHadronsModel &	operator= (const G4eeToHadronsModel &right)

	G4eeToHadronsModel (const G4eeToHadronsModel &)

Private Attributes
G4Vee2hadrons *	model

G4ParticleDefinition *	theGamma

G4PhysicsVector *	crossPerElectron

G4PhysicsVector *	crossBornPerElectron

G4bool	isInitialised

G4int	nbins

G4int	verbose

G4double	lowKinEnergy

G4double	peakKinEnergy

G4double	highKinEnergy

G4double	emin

G4double	epeak

G4double	emax

Additional Inherited Members
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 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 59 of file G4eeToHadronsModel.hh.

Constructor & Destructor Documentation

◆ G4eeToHadronsModel() [1/2]

G4eeToHadronsModel::G4eeToHadronsModel	(	G4Vee2hadrons *	mod,
		G4int	ver = `0`,
		const G4String &	nam = `"eeToHadrons"`
	)

Definition at line 70 of file G4eeToHadronsModel.cc.

   : G4VEmModel(nam),
     model(mod),
     crossPerElectron(0),
     crossBornPerElectron(0),
     isInitialised(false),
     nbins(100),
     verbose(ver)
 {
   theGamma = G4Gamma::Gamma();
   highKinEnergy = HighEnergyLimit();
   lowKinEnergy  = LowEnergyLimit();
   emin = lowKinEnergy;
   emax = highKinEnergy;
   peakKinEnergy = highKinEnergy;
   epeak = emax;
   //verbose = 1;
 }

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◆ ~G4eeToHadronsModel()

G4eeToHadronsModel::~G4eeToHadronsModel ( )

virtual

Definition at line 92 of file G4eeToHadronsModel.cc.

 {
   delete model;
 }

◆ G4eeToHadronsModel() [2/2]

G4eeToHadronsModel::G4eeToHadronsModel ( const G4eeToHadronsModel & )

private

Member Function Documentation

◆ ComputeCMCrossSectionPerElectron()

void G4eeToHadronsModel::ComputeCMCrossSectionPerElectron ( )

private

Definition at line 239 of file G4eeToHadronsModel.cc.

 {
   for(G4int i=0; i<nbins; i++) {
     G4double e  = crossPerElectron->Energy(i);
     G4double cs = 0.0;
     if(i > 0) {
       G4double LL   = 2.0*G4Log(e/electron_mass_c2);
       G4double bt  = 2.0*fine_structure_const*(LL - 1.0)/pi;
       G4double btm1= bt - 1.0;
       G4double del = 1. + fine_structure_const*(1.5*LL + pi*pi/3. -2.)/pi;
       G4double s1  = crossBornPerElectron->Value(e);
       G4double e1  = crossPerElectron->Energy(i-1);
       G4double x1  = 1. - e1/e;
       cs += s1*(del*G4Exp(G4Log(x1)*bt) - bt*(x1 - 0.25*x1*x1));
       if(i > 1) {
     G4double e2  = e1;
     G4double x2  = x1;
     G4double s2  = crossBornPerElectron->Value(e2);
     G4double w2  = bt*(del*G4Exp(G4Log(x2)*btm1) - 1.0 + 0.5*x2);
         G4double w1;      
 
     for(G4int j=i-2; j>=0; --j) {
       e1  = crossPerElectron->Energy(j);
       x1  = 1. - e1/e;
       s1  = crossBornPerElectron->Value(e1);
       w1  = bt*(del*G4Exp(G4Log(x1)*btm1) - 1.0 + 0.5*x1);
       cs += 0.5*(x1 - x2)*(w2*s2 + w1*s1);
       e2 = e1;
       x2 = x1;
       s2 = s1;
       w2 = w1;
     }
       }
     }
     crossPerElectron->PutValue(i, cs);
   }
 }

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◆ ComputeCrossSectionPerAtom()

G4double G4eeToHadronsModel::ComputeCrossSectionPerAtom	(	const G4ParticleDefinition *	p,
		G4double	kineticEnergy,
		G4double	Z,
		G4double	A,
		G4double	cutEnergy = `0.0`,
		G4double	maxEnergy = `DBL_MAX`
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 162 of file G4eeToHadronsModel.cc.

 {
   return Z*ComputeCrossSectionPerElectron(p, kineticEnergy);
 }

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◆ ComputeCrossSectionPerElectron()

G4double G4eeToHadronsModel::ComputeCrossSectionPerElectron	(	const G4ParticleDefinition *	,
		G4double	kineticEnergy,
		G4double	cutEnergy = `0.0`,
		G4double	maxEnergy = `DBL_MAX`
	)

virtual

Definition at line 173 of file G4eeToHadronsModel.cc.

 {
   G4double cross = 0.0;
   if(crossPerElectron) {
     cross = crossPerElectron->Value(energy);
   }
   return cross;
 }

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◆ CrossSectionPerVolume()

G4double G4eeToHadronsModel::CrossSectionPerVolume	(	const G4Material *	mat,
		const G4ParticleDefinition *	p,
		G4double	kineticEnergy,
		G4double	cutEnergy,
		G4double	maxEnergy
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 150 of file G4eeToHadronsModel.cc.

 {
   return mat->GetElectronDensity()*
     ComputeCrossSectionPerElectron(p, kineticEnergy);
 }

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◆ GenerateCMPhoton()

G4DynamicParticle * G4eeToHadronsModel::GenerateCMPhoton ( G4double e )

Definition at line 279 of file G4eeToHadronsModel.cc.

 {
   G4double x;
   G4DynamicParticle* gamma = 0;
   G4double LL   = 2.0*G4Log(e/electron_mass_c2);
   G4double bt  = 2.0*fine_structure_const*(LL - 1.)/pi;
   G4double btm1= bt - 1.0;
   G4double del = 1. + fine_structure_const*(1.5*LL + pi*pi/3. -2.)/pi;
 
   G4double s0 = crossBornPerElectron->Value(e);
   G4double de = (emax - emin)/(G4double)nbins;
   G4double xmax = 0.5*(1.0 - (emin*emin)/(e*e));
   G4double xmin = std::min(de/e, xmax);
   G4double ds = s0*(del*G4Exp(G4Log(xmin)*bt) - bt*(xmin - 0.25*xmin*xmin));
   G4double e1 = e*(1. - xmin);
   
   //G4cout << "e1= " << e1 << G4endl;
   if(e1 < emax && s0*G4UniformRand()<ds) { 
     x = xmin*G4Exp(G4Log(G4UniformRand())/bt);
   } else {    
 
     x = xmin;
     G4double s1 = crossBornPerElectron->Value(e1);
     G4double w1 = bt*(del*G4Exp(G4Log(x)*btm1) - 1.0 + 0.5*x);
     G4double grej = s1*w1;
     G4double f;
     /*
      G4cout << "e(GeV)= " << e/GeV << " epeak(GeV)= " << epeak/GeV 
            << " s1= " << s1 << " w1= " << w1 
            << " grej= " << grej << G4endl;
     */
     // Above emax cross section is const
     if(e1 > emax) {
       x  = 0.5*(1. - (emax*emax)/(e*e));
       G4double s2 = crossBornPerElectron->Value(emax);
       G4double w2 = bt*(del*G4Exp(G4Log(x)*btm1) - 1.0 + 0.5*x);
       grej = s2*w2;
       //G4cout << "emax= " << emax << " s2= " << s2 << " w2= " << w2 
       // << " grej= " << grej << G4endl;
     }
 
     if(e1 > epeak) {
       x = 0.5*(1.0 - (epeak*epeak)/(e*e));
       G4double s2 = crossBornPerElectron->Value(epeak);
       G4double w2 = bt*(del*G4Exp(G4Log(x)*btm1) - 1.0 + 0.5*x);
       grej = std::max(grej,s2*w2);
       //G4cout << "epeak= " << epeak << " s2= " << s2 << " w2= " << w2 
       //     << " grej= " << grej << G4endl;
     }
     G4int ii = 0;
     const G4int iimax = 1000;
     do {
       x = xmin + G4UniformRand()*(xmax - xmin);
       
       G4double s2 = crossBornPerElectron->Value(sqrt(1.0 - 2*x)*e);
       G4double w2 = bt*(del*G4Exp(G4Log(x)*btm1) - 1.0 + 0.5*x);
       /*
       G4cout << "x= " << x << " xmin= " << xmin << " xmax= " << xmax
            << " s2= " << s2 << " w2= " << w2 << G4endl;
       */
       f = s2*w2;
       if(f > grej) {
     G4cout << "G4DynamicParticle* G4eeToHadronsModel:WARNING "
            << f << " > " << grej << " majorant is`small!" 
            << G4endl; 
       }
       if(++ii >= iimax) { break; }
       // Loop checking, 07-Aug-2015, Vladimir Ivanchenko
     } while (f < grej*G4UniformRand());
   }
 
   G4ThreeVector dir(0.0,0.0,1.0);
   if(G4UniformRand() > 0.5) { dir.set(0.0,0.0,-1.0); }
   //G4cout << "Egamma(MeV)= " << x*e <<  " " << dir << G4endl; 
   gamma = new G4DynamicParticle(theGamma,dir,x*e);
   return gamma;
 }

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◆ Initialise()

void G4eeToHadronsModel::Initialise	(	const G4ParticleDefinition *	,
		const G4DataVector &
	)

virtual

Implements G4VEmModel.

Definition at line 99 of file G4eeToHadronsModel.cc.

 {
   if(isInitialised) { return; }
   isInitialised  = true;
 
   // CM system
   emin  = model->LowEnergy();
   emax  = model->HighEnergy();
 
   // peak energy
   epeak = std::min(model->PeakEnergy(), emax);
   
   if(verbose>0) {
     G4cout << "G4eeToHadronsModel::Initialise: " << G4endl;
     G4cout << "CM System: emin(MeV)= " << emin/MeV
            << " epeak(MeV)= " << epeak/MeV
            << " emax(MeV)= " << emax/MeV
            << G4endl;
   }
 
   crossBornPerElectron = model->PhysicsVector();
   crossPerElectron     = model->PhysicsVector(); 
   nbins = crossPerElectron->GetVectorLength();
   for(G4int i=0; i<nbins; ++i) {
     G4double e  = crossPerElectron->Energy(i);
     G4double cs = model->ComputeCrossSection(e);
     crossBornPerElectron->PutValue(i, cs);
   }
   ComputeCMCrossSectionPerElectron();
 
   if(verbose>1) {
     G4cout << "G4eeToHadronsModel: Cross secsions per electron"
            << " nbins= " << nbins
            << " emin(MeV)= " << emin/MeV
            << " emax(MeV)= " << emax/MeV
            << G4endl;
     for(G4int i=0; i<nbins; ++i) {
       G4double e  = crossPerElectron->Energy(i);
       G4double s1 = crossPerElectron->Value(e);
       G4double s2 = crossBornPerElectron->Value(e);
       G4cout << "E(MeV)= " << e/MeV
              << "  cross(nb)= " << s1/nanobarn
              << "  crossBorn(nb)= " << s2/nanobarn
          << G4endl;
     }
   }
 }

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◆ operator=()

G4eeToHadronsModel& G4eeToHadronsModel::operator= ( const G4eeToHadronsModel & right )

private

◆ PeakEnergy()

G4double G4eeToHadronsModel::PeakEnergy ( ) const

inline

Definition at line 127 of file G4eeToHadronsModel.hh.

 {
   return peakKinEnergy;
 }

◆ SampleSecondaries()

void G4eeToHadronsModel::SampleSecondaries	(	std::vector< G4DynamicParticle >	newp,
		const G4MaterialCutsCouple *	,
		const G4DynamicParticle *	dParticle,
		G4double	tmin = `0.0`,
		G4double	maxEnergy = `DBL_MAX`
	)

virtual

Implements G4VEmModel.

Definition at line 187 of file G4eeToHadronsModel.cc.

 {
   if(crossPerElectron) {
     G4double t = dParticle->GetKineticEnergy() + 2*electron_mass_c2;
     G4LorentzVector inlv = dParticle->Get4Momentum() + 
       G4LorentzVector(0.0,0.0,0.0,electron_mass_c2);
     G4double e = inlv.m();
     G4ThreeVector inBoost = inlv.boostVector();
     //G4cout << "G4eeToHadronsModel::SampleSecondaries e= " << e 
     //     << " " << inlv << " " << inBoost <<G4endl;
     if(e > emin) {
       G4DynamicParticle* gamma = GenerateCMPhoton(e);
       G4LorentzVector gLv = gamma->Get4Momentum();
       G4LorentzVector lv(0.0,0.0,0.0,e);
       lv -= gLv;
       G4double mass = lv.m();
       //G4cout << "mass= " << mass << " " << lv << G4endl;
       G4ThreeVector boost = lv.boostVector();
       //G4cout << "mass= " << mass << " " << boost << G4endl;
       const G4ThreeVector dir = gamma->GetMomentumDirection();
       model->SampleSecondaries(newp, mass, dir);
       G4int np = newp->size();
       for(G4int j=0; j<np; ++j) {
     G4DynamicParticle* dp = (*newp)[j];
     G4LorentzVector v = dp->Get4Momentum();
     v.boost(boost);
         //G4cout << j << ". " << v << G4endl;
     v.boost(inBoost);
         //G4cout << "   " << v << G4endl;
     dp->Set4Momentum(v);
         t -= v.e();
       }
       //G4cout << "Gamma   " << gLv << G4endl;
       gLv.boost(inBoost);
       //G4cout << "        " << gLv << G4endl;
       gamma->Set4Momentum(gLv);
       t -= gLv.e();
       newp->push_back(gamma);
       if(fabs(t) > MeV) {
     G4cout << "G4eeToHadronsModel::SampleSecondaries: Ebalance(MeV)= " 
            << t/MeV << " primary 4-momentum: " << inlv <<  G4endl;
       }
     }
   }
 }

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Member Data Documentation

◆ crossBornPerElectron

G4PhysicsVector* G4eeToHadronsModel::crossBornPerElectron

private

Definition at line 111 of file G4eeToHadronsModel.hh.

◆ crossPerElectron

G4PhysicsVector* G4eeToHadronsModel::crossPerElectron

private

Definition at line 110 of file G4eeToHadronsModel.hh.

◆ emax

G4double G4eeToHadronsModel::emax

private

Definition at line 122 of file G4eeToHadronsModel.hh.

◆ emin

G4double G4eeToHadronsModel::emin

private

Definition at line 120 of file G4eeToHadronsModel.hh.

◆ epeak

G4double G4eeToHadronsModel::epeak

private

Definition at line 121 of file G4eeToHadronsModel.hh.

◆ highKinEnergy

G4double G4eeToHadronsModel::highKinEnergy

private

Definition at line 118 of file G4eeToHadronsModel.hh.

◆ isInitialised

G4bool G4eeToHadronsModel::isInitialised

private

Definition at line 112 of file G4eeToHadronsModel.hh.

◆ lowKinEnergy

G4double G4eeToHadronsModel::lowKinEnergy

private

Definition at line 116 of file G4eeToHadronsModel.hh.

◆ model

G4Vee2hadrons* G4eeToHadronsModel::model

private

Definition at line 108 of file G4eeToHadronsModel.hh.

◆ nbins

G4int G4eeToHadronsModel::nbins

private

Definition at line 113 of file G4eeToHadronsModel.hh.

◆ peakKinEnergy

G4double G4eeToHadronsModel::peakKinEnergy

private

Definition at line 117 of file G4eeToHadronsModel.hh.

◆ theGamma

G4ParticleDefinition* G4eeToHadronsModel::theGamma

private

Definition at line 109 of file G4eeToHadronsModel.hh.

◆ verbose

G4int G4eeToHadronsModel::verbose

private

Definition at line 114 of file G4eeToHadronsModel.hh.

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

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ G4eeToHadronsModel() [1/2]

◆ ~G4eeToHadronsModel()

◆ G4eeToHadronsModel() [2/2]

Member Function Documentation

◆ ComputeCMCrossSectionPerElectron()

◆ ComputeCrossSectionPerAtom()

◆ ComputeCrossSectionPerElectron()

◆ CrossSectionPerVolume()

◆ GenerateCMPhoton()

◆ Initialise()

◆ operator=()

◆ PeakEnergy()

◆ SampleSecondaries()

Member Data Documentation

◆ crossBornPerElectron

◆ crossPerElectron

◆ emax

◆ emin

◆ epeak

◆ highKinEnergy

◆ isInitialised

◆ lowKinEnergy

◆ model

◆ nbins

◆ peakKinEnergy

◆ theGamma

◆ verbose