#include <G4eBremsstrahlungRelModel.hh>

Inheritance diagram for G4eBremsstrahlungRelModel:

Collaboration diagram for G4eBremsstrahlungRelModel:

Public Member Functions
	G4eBremsstrahlungRelModel (const G4ParticleDefinition *p=0, const G4String &nam="eBremLPM")

virtual	~G4eBremsstrahlungRelModel ()

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

virtual void	InitialiseLocal (const G4ParticleDefinition , G4VEmModel masterModel)

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

virtual G4double	ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double tkin, G4double Z, G4double, G4double cutEnergy, G4double maxEnergy=DBL_MAX)

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

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

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

void	SetLPMconstant (G4double val)

G4double	LPMconstant () const

void	SetLowestKinEnergy (G4double)

G4double	LowestKinEnergy () 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	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	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
virtual G4double	ComputeDXSectionPerAtom (G4double gammaEnergy)

void	SetCurrentElement (const G4double)

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
G4NistManager *	nist

const G4ParticleDefinition *	particle

G4ParticleDefinition *	theGamma

G4ParticleChangeForLoss *	fParticleChange

G4double	bremFactor

G4double	particleMass

G4double	kinEnergy

G4double	totalEnergy

G4double	currentZ

G4double	densityFactor

G4double	densityCorr

G4bool	isElectron

Protected Attributes inherited from G4VEmModel
G4ElementData *	fElementData

G4VParticleChange *	pParticleChange

G4PhysicsTable *	xSectionTable

const std::vector< G4double > *	theDensityFactor

const std::vector< G4int > *	theDensityIdx

size_t	idxTable

Private Member Functions
void	InitialiseConstants ()

void	CalcLPMFunctions (G4double gammaEnergy)

G4double	ComputeBremLoss (G4double cutEnergy)

G4double	ComputeXSectionPerAtom (G4double cutEnergy)

G4double	ComputeRelDXSectionPerAtom (G4double gammaEnergy)

void	SetParticle (const G4ParticleDefinition *p)

G4double	Phi1 (G4double, G4double)

G4double	Phi1M2 (G4double, G4double)

G4double	Psi1 (G4double, G4double)

G4double	Psi1M2 (G4double, G4double)

G4eBremsstrahlungRelModel &	operator= (const G4eBremsstrahlungRelModel &right)

	G4eBremsstrahlungRelModel (const G4eBremsstrahlungRelModel &)

Static Private Attributes
static const G4double	xgi [8]

static const G4double	wgi [8]

static const G4double	Fel_light [5] = {0., 5.31 , 4.79 , 4.74 , 4.71}

static const G4double	Finel_light [5] = {0., 6.144 , 5.621 , 5.805 , 5.924}

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

Detailed Description

Definition at line 62 of file G4eBremsstrahlungRelModel.hh.

Constructor & Destructor Documentation

◆ G4eBremsstrahlungRelModel() [1/2]

G4eBremsstrahlungRelModel::G4eBremsstrahlungRelModel	(	const G4ParticleDefinition *	p = `0`,
		const G4String &	nam = `"eBremLPM"`
	)

Definition at line 87 of file G4eBremsstrahlungRelModel.cc.

   : G4VEmModel(nam),
     particle(0),
     bremFactor(fine_structure_const*classic_electr_radius*classic_electr_radius*16./3.),
     isElectron(true),
     fMigdalConstant(classic_electr_radius*electron_Compton_length*electron_Compton_length*4.0*pi),
     fLPMconstant(fine_structure_const*electron_mass_c2*electron_mass_c2/(4.*pi*hbarc)*0.5),
     fXiLPM(0), fPhiLPM(0), fGLPM(0),
     use_completescreening(false)
 {
   fParticleChange = 0;
   theGamma = G4Gamma::Gamma();
 
   lowestKinEnergy = 1.0*MeV;
   SetLowEnergyLimit(lowestKinEnergy);  
 
   nist = G4NistManager::Instance();  
 
   SetLPMFlag(true);
   //SetAngularDistribution(new G4ModifiedTsai());
   SetAngularDistribution(new G4DipBustGenerator());
 
   particleMass = kinEnergy = totalEnergy = currentZ = z13 = z23 = lnZ = Fel 
     = Finel = fCoulomb = fMax = densityFactor = densityCorr = lpmEnergy 
     = xiLPM = phiLPM = gLPM = klpm = kp = 0.0;
 
   energyThresholdLPM = 1.e39;
 
   InitialiseConstants();
   if(p) { SetParticle(p); }
 }

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◆ ~G4eBremsstrahlungRelModel()

G4eBremsstrahlungRelModel::~G4eBremsstrahlungRelModel ( )

virtual

Definition at line 133 of file G4eBremsstrahlungRelModel.cc.

134 {

135 }

◆ G4eBremsstrahlungRelModel() [2/2]

G4eBremsstrahlungRelModel::G4eBremsstrahlungRelModel ( const G4eBremsstrahlungRelModel & )

private

Member Function Documentation

◆ CalcLPMFunctions()

void G4eBremsstrahlungRelModel::CalcLPMFunctions ( G4double gammaEnergy )

private

Definition at line 347 of file G4eBremsstrahlungRelModel.cc.

 {
   // *** calculate lpm variable s & sprime ***
   // Klein eqs. (78) & (79)
   G4double sprime = sqrt(0.125*k*lpmEnergy/(totalEnergy*(totalEnergy-k)));
 
   G4double s1 = preS1*z23;
   G4double logS1 = 2./3.*lnZ-2.*facFel;
   G4double logTS1 = logTwo+logS1;
 
   xiLPM = 2.;
 
   if (sprime>1) 
     xiLPM = 1.;
   else if (sprime>sqrt(2.)*s1) {
     G4double h  = G4Log(sprime)/logTS1;
     xiLPM = 1+h-0.08*(1-h)*(1-sqr(1-h))/logTS1;
   }
 
   G4double s0 = sprime/sqrt(xiLPM); 
 
   // *** merging with density effect***  should be only necessary in region 
   // "close to" kp, e.g. k<100*kp using Ter-Mikaelian eq. (20.9)
   G4double k2 = k*k;
   s0 *= (1 + (densityCorr/k2) );
 
   // recalculate Xi using modified s above
   // Klein eq. (75)
   xiLPM = 1.;
   if (s0<=s1) xiLPM = 2.;
   else if ( (s1<s0) && (s0<=1) ) { xiLPM = 1. + G4Log(s0)/logS1; }
   
 
   // *** calculate supression functions phi and G ***
   // Klein eqs. (77)
   G4double s2=s0*s0;
   G4double s3=s0*s2;
   G4double s4=s2*s2;
 
   if (s0<0.1) {
     // high suppression limit
     phiLPM = 6.*s0 - 18.84955592153876*s2 + 39.47841760435743*s3 
       - 57.69873135166053*s4;
     gLPM = 37.69911184307752*s2 - 236.8705056261446*s3 + 807.7822389*s4;
   }
   else if (s0<1.9516) {
     // intermediate suppression
     // using eq.77 approxim. valid s<2.      
     phiLPM = 1.-G4Exp(-6.*s0*(1.+(3.-pi)*s0)
         +s3/(0.623+0.795*s0+0.658*s2));
     if (s0<0.415827397755) {
       // using eq.77 approxim. valid 0.07<s<2
       G4double psiLPM = 1-G4Exp(-4*s0-8*s2/(1+3.936*s0+4.97*s2-0.05*s3+7.50*s4));
       gLPM = 3*psiLPM-2*phiLPM;
     }
     else {
       // using alternative parametrisiation
       G4double pre = -0.16072300849123999 + s0*3.7550300067531581 + s2*-1.7981383069010097 
     + s3*0.67282686077812381 + s4*-0.1207722909879257;
       gLPM = tanh(pre);
     }
   }
   else {
     // low suppression limit valid s>2.
     phiLPM = 1. - 0.0119048/s4;
     gLPM = 1. - 0.0230655/s4;
   }
 
   // *** make sure suppression is smaller than 1 ***
   // *** caused by Migdal approximation in xi    ***
   if (xiLPM*phiLPM>1. || s0>0.57)  { xiLPM=1./phiLPM; }
 }

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◆ ComputeBremLoss()

G4double G4eBremsstrahlungRelModel::ComputeBremLoss ( G4double cutEnergy )

private

Definition at line 244 of file G4eBremsstrahlungRelModel.cc.

 {
   G4double loss = 0.0;
 
   // number of intervals and integration step 
   G4double vcut = cut/totalEnergy;
   G4int n = (G4int)(20*vcut) + 3;
   G4double delta = vcut/G4double(n);
 
   G4double e0 = 0.0;
   G4double xs; 
 
   // integration
   for(G4int l=0; l<n; l++) {
 
     for(G4int i=0; i<8; i++) {
 
       G4double eg = (e0 + xgi[i]*delta)*totalEnergy;
 
       if(totalEnergy > energyThresholdLPM) {
     xs = ComputeRelDXSectionPerAtom(eg);
       } else {
     xs = ComputeDXSectionPerAtom(eg);
       }
       loss += wgi[i]*xs/(1.0 + densityCorr/(eg*eg));
     }
     e0 += delta;
   }
 
   loss *= delta*totalEnergy;
 
   return loss;
 }

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◆ ComputeCrossSectionPerAtom()

G4double G4eBremsstrahlungRelModel::ComputeCrossSectionPerAtom	(	const G4ParticleDefinition *	p,
		G4double	tkin,
		G4double	Z,
		G4double	,
		G4double	cutEnergy,
		G4double	maxEnergy = `DBL_MAX`
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 280 of file G4eBremsstrahlungRelModel.cc.

 {
   if(!particle) { SetParticle(p); }
   if(kineticEnergy < LowEnergyLimit()) { return 0.0; }
   G4double cut  = std::min(cutEnergy, kineticEnergy);
   G4double tmax = std::min(maxEnergy, kineticEnergy);
 
   if(cut >= tmax) { return 0.0; }
 
   SetCurrentElement(Z);
 
   G4double cross = ComputeXSectionPerAtom(cut);
 
   // allow partial integration
   if(tmax < kinEnergy) { cross -= ComputeXSectionPerAtom(tmax); }
   
   cross *= Z*Z*bremFactor;
 
   return cross;
 }

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◆ ComputeDEDXPerVolume()

G4double G4eBremsstrahlungRelModel::ComputeDEDXPerVolume	(	const G4Material *	material,
		const G4ParticleDefinition *	p,
		G4double	kineticEnergy,
		G4double	cutEnergy
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 210 of file G4eBremsstrahlungRelModel.cc.

 {
   if(!particle) { SetParticle(p); }
   if(kineticEnergy < LowEnergyLimit()) { return 0.0; }
   G4double cut = std::min(cutEnergy, kineticEnergy);
   if(cut == 0.0) { return 0.0; }
 
   SetupForMaterial(particle, material,kineticEnergy);
 
   const G4ElementVector* theElementVector = material->GetElementVector();
   const G4double* theAtomicNumDensityVector = material->GetAtomicNumDensityVector();
 
   G4double dedx = 0.0;
 
   //  loop for elements in the material
   for (size_t i=0; i<material->GetNumberOfElements(); i++) {
 
     G4VEmModel::SetCurrentElement((*theElementVector)[i]);
     SetCurrentElement((*theElementVector)[i]->GetZ());
 
     dedx += theAtomicNumDensityVector[i]*currentZ*currentZ*ComputeBremLoss(cut);
   }
   dedx *= bremFactor;
 
 
   return dedx;
 }

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◆ ComputeDXSectionPerAtom()

G4double G4eBremsstrahlungRelModel::ComputeDXSectionPerAtom ( G4double gammaEnergy )

protectedvirtual

Reimplemented in G4LivermoreBremsstrahlungModel, and G4SeltzerBergerModel.

Definition at line 449 of file G4eBremsstrahlungRelModel.cc.

 {
 
   if(gammaEnergy < 0.0) { return 0.0; }
 
   G4double y = gammaEnergy/totalEnergy;
 
   G4double main=0.,secondTerm=0.;
 
   if (use_completescreening|| currentZ<5) {
     // ** form factors complete screening case **      
     main   = (3./4.*y*y - y + 1.) * ( (Fel-fCoulomb) + Finel/currentZ );
     secondTerm = (1.-y)/12.*(1.+1./currentZ);
   }
   else {
     // ** intermediate screening using Thomas-Fermi FF from Tsai only valid for Z>=5** 
     G4double dd=100.*electron_mass_c2*y/(totalEnergy-gammaEnergy);
     G4double gg=dd/z13;
     G4double eps=dd/z23;
     G4double phi1=Phi1(gg,currentZ),  phi1m2=Phi1M2(gg,currentZ);
     G4double psi1=Psi1(eps,currentZ),  psi1m2=Psi1M2(eps,currentZ);
     
     main   = (3./4.*y*y - y + 1.) * ( (0.25*phi1-1./3.*lnZ-fCoulomb) + (0.25*psi1-2./3.*lnZ)/currentZ );
     secondTerm = (1.-y)/8.*(phi1m2+psi1m2/currentZ);
   }
   G4double cross = main+secondTerm;
   return cross;
 }

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◆ ComputeRelDXSectionPerAtom()

G4double G4eBremsstrahlungRelModel::ComputeRelDXSectionPerAtom ( G4double gammaEnergy )

private

Definition at line 423 of file G4eBremsstrahlungRelModel.cc.

 {
   if(gammaEnergy < 0.0) { return 0.0; }
 
   G4double y = gammaEnergy/totalEnergy;
   G4double y2 = y*y*.25;
   G4double yone2 = (1.-y+2.*y2);
 
   // ** form factors complete screening case **      
 
   // ** calc LPM functions -- include ter-mikaelian merging with density effect **
   //  G4double xiLPM, gLPM, phiLPM;  // to be made member variables !!!
   CalcLPMFunctions(gammaEnergy);
 
   G4double mainLPM   = xiLPM*(y2 * gLPM + yone2*phiLPM) * ( (Fel-fCoulomb) + Finel/currentZ );
   G4double secondTerm = (1.-y)/12.*(1.+1./currentZ);
 
   G4double cross = mainLPM+secondTerm;
   return cross;
 }

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◆ ComputeXSectionPerAtom()

G4double G4eBremsstrahlungRelModel::ComputeXSectionPerAtom ( G4double cutEnergy )

private

Definition at line 309 of file G4eBremsstrahlungRelModel.cc.

 {
   G4double cross = 0.0;
 
   // number of intervals and integration step 
   G4double vcut = G4Log(cut/totalEnergy);
   G4double vmax = G4Log(kinEnergy/totalEnergy);
   G4int n = (G4int)(0.45*(vmax - vcut)) + 4;
   //  n=1; //  integration test 
   G4double delta = (vmax - vcut)/G4double(n);
 
   G4double e0 = vcut;
   G4double xs; 
 
   // integration
   for(G4int l=0; l<n; l++) {
 
     for(G4int i=0; i<8; i++) {
 
       G4double eg = G4Exp(e0 + xgi[i]*delta)*totalEnergy;
 
       if(totalEnergy > energyThresholdLPM) {
     xs = ComputeRelDXSectionPerAtom(eg);
       } else {
     xs = ComputeDXSectionPerAtom(eg);
       }
       cross += wgi[i]*xs/(1.0 + densityCorr/(eg*eg));
     }
     e0 += delta;
   }
 
   cross *= delta;
 
   return cross;
 }

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◆ Initialise()

void G4eBremsstrahlungRelModel::Initialise	(	const G4ParticleDefinition *	p,
		const G4DataVector &	cuts
	)

virtual

Implements G4VEmModel.

Reimplemented in G4LivermoreBremsstrahlungModel, G4SeltzerBergerModel, and G4ePolarizedBremsstrahlungModel.

Definition at line 174 of file G4eBremsstrahlungRelModel.cc.

 {
   if(p) { SetParticle(p); }
 
   currentZ = 0.;
 
   if(IsMaster() && LowEnergyLimit() < HighEnergyLimit()) { 
     InitialiseElementSelectors(p, cuts); 
   }
 
   if(!fParticleChange) { fParticleChange = GetParticleChangeForLoss(); }
 }

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◆ InitialiseConstants()

void G4eBremsstrahlungRelModel::InitialiseConstants ( )

private

Definition at line 122 of file G4eBremsstrahlungRelModel.cc.

 {
   facFel = G4Log(184.15);
   facFinel = G4Log(1194.);
 
   preS1 = 1./(184.15*184.15);
   logTwo = G4Log(2.);
 }

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◆ InitialiseLocal()

void G4eBremsstrahlungRelModel::InitialiseLocal	(	const G4ParticleDefinition *	,
		G4VEmModel *	masterModel
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 190 of file G4eBremsstrahlungRelModel.cc.

 {
   if(LowEnergyLimit() < HighEnergyLimit()) { 
     SetElementSelectors(masterModel->GetElementSelectors());
   }
 }

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◆ LowestKinEnergy()

G4double G4eBremsstrahlungRelModel::LowestKinEnergy ( ) const

inline

Definition at line 267 of file G4eBremsstrahlungRelModel.hh.

 {
   return lowestKinEnergy;
 }

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◆ LPMconstant()

G4double G4eBremsstrahlungRelModel::LPMconstant ( ) const

inline

Definition at line 255 of file G4eBremsstrahlungRelModel.hh.

 {
   return fLPMconstant;
 }

◆ MinPrimaryEnergy()

G4double G4eBremsstrahlungRelModel::MinPrimaryEnergy	(	const G4Material *	,
		const G4ParticleDefinition *	,
		G4double	cut
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 201 of file G4eBremsstrahlungRelModel.cc.

 {
   return std::max(lowestKinEnergy, cut);
 }

◆ operator=()

G4eBremsstrahlungRelModel& G4eBremsstrahlungRelModel::operator= ( const G4eBremsstrahlungRelModel & right )

private

◆ Phi1()

G4double G4eBremsstrahlungRelModel::Phi1	(	G4double	gg,
		G4double
	)

inlineprivate

Definition at line 217 of file G4eBremsstrahlungRelModel.hh.

 {
   //       Thomas-Fermi FF from Tsai, eq.(3.38) for Z>=5
   return 20.863 - 2.*G4Log(1. + sqr(0.55846*gg) )
     - 4.*( 1. - 0.6*G4Exp(-0.9*gg) - 0.4*G4Exp(-1.5*gg) );
 }

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◆ Phi1M2()

G4double G4eBremsstrahlungRelModel::Phi1M2	(	G4double	gg,
		G4double
	)

inlineprivate

Definition at line 224 of file G4eBremsstrahlungRelModel.hh.

 {
   //       Thomas-Fermi FF from Tsai, eq. (3.39) for Z>=5
   // return Phi1(gg,Z) - 
   return 2./(3.*(1. + 6.5*gg +6.*gg*gg) );
 }

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◆ Psi1()

G4double G4eBremsstrahlungRelModel::Psi1	(	G4double	eps,
		G4double
	)

inlineprivate

Definition at line 231 of file G4eBremsstrahlungRelModel.hh.

 {
   //       Thomas-Fermi FF from Tsai, eq.(3.40) for Z>=5 
   return 28.340 - 2.*G4Log(1. + sqr(3.621*eps) )
     - 4.*( 1. - 0.7*G4Exp(-8*eps) - 0.3*G4Exp(-29.*eps) );
 }

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◆ Psi1M2()

G4double G4eBremsstrahlungRelModel::Psi1M2	(	G4double	eps,
		G4double
	)

inlineprivate

Definition at line 238 of file G4eBremsstrahlungRelModel.hh.

 {
   //       Thomas-Fermi FF from Tsai, eq. (3.41) for Z>=5
   return  2./(3.*(1. + 40.*eps +400.*eps*eps) );
 }

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◆ SampleSecondaries()

void G4eBremsstrahlungRelModel::SampleSecondaries	(	std::vector< G4DynamicParticle >	vdp,
		const G4MaterialCutsCouple *	couple,
		const G4DynamicParticle *	dp,
		G4double	cutEnergy,
		G4double	maxEnergy
	)

virtual

Implements G4VEmModel.

Reimplemented in G4LivermoreBremsstrahlungModel, G4SeltzerBergerModel, and G4ePolarizedBremsstrahlungModel.

Definition at line 484 of file G4eBremsstrahlungRelModel.cc.

 {
   G4double kineticEnergy = dp->GetKineticEnergy();
   if(kineticEnergy < LowEnergyLimit()) { return; }
   G4double cut  = std::min(cutEnergy, kineticEnergy);
   G4double emax = std::min(maxEnergy, kineticEnergy);
   if(cut >= emax) { return; }
 
   SetupForMaterial(particle, couple->GetMaterial(), kineticEnergy);
 
   const G4Element* elm = 
     SelectRandomAtom(couple,particle,kineticEnergy,cut,emax);
   SetCurrentElement(elm->GetZ());
 
   kinEnergy   = kineticEnergy;
   totalEnergy = kineticEnergy + particleMass;
   densityCorr = densityFactor*totalEnergy*totalEnergy;
 
   //G4double fmax= fMax;
   G4bool highe = true;
   if(totalEnergy < energyThresholdLPM) { highe = false; }
  
   G4double xmin = G4Log(cut*cut + densityCorr);
   G4double xmax = G4Log(emax*emax  + densityCorr);
   G4double gammaEnergy, f, x; 
 
   CLHEP::HepRandomEngine* rndmEngine = G4Random::getTheEngine();
 
   do {
     x = G4Exp(xmin + rndmEngine->flat()*(xmax - xmin)) - densityCorr;
     if(x < 0.0) { x = 0.0; }
     gammaEnergy = sqrt(x);
     if(highe) { f = ComputeRelDXSectionPerAtom(gammaEnergy); }
     else      { f = ComputeDXSectionPerAtom(gammaEnergy); }
 
     if ( f > fMax ) {
       G4cout << "### G4eBremsstrahlungRelModel Warning: Majoranta exceeded! "
          << f << " > " << fMax
          << " Egamma(MeV)= " << gammaEnergy
          << " Ee(MeV)= " << kineticEnergy
          << "  " << GetName()
          << G4endl;
     }
 
     // Loop checking, 03-Aug-2015, Vladimir Ivanchenko
   } while (f < fMax*rndmEngine->flat());
 
   //
   // angles of the emitted gamma. ( Z - axis along the parent particle)
   // use general interface
   //
 
   G4ThreeVector gammaDirection = 
     GetAngularDistribution()->SampleDirection(dp, totalEnergy-gammaEnergy,
                           G4lrint(currentZ), 
                           couple->GetMaterial());
 
   // create G4DynamicParticle object for the Gamma
   G4DynamicParticle* gamma = new G4DynamicParticle(theGamma,gammaDirection,
                            gammaEnergy);
   vdp->push_back(gamma);
   
   G4double totMomentum = sqrt(kineticEnergy*(totalEnergy + electron_mass_c2));
   G4ThreeVector direction = (totMomentum*dp->GetMomentumDirection()
                  - gammaEnergy*gammaDirection).unit();
 
   // energy of primary
   G4double finalE = kineticEnergy - gammaEnergy;
 
   // stop tracking and create new secondary instead of primary
   if(gammaEnergy > SecondaryThreshold()) {
     fParticleChange->ProposeTrackStatus(fStopAndKill);
     fParticleChange->SetProposedKineticEnergy(0.0);
     G4DynamicParticle* el = 
       new G4DynamicParticle(const_cast<G4ParticleDefinition*>(particle),
                 direction, finalE);
     vdp->push_back(el);
 
     // continue tracking
   } else {
     fParticleChange->SetProposedMomentumDirection(direction);
     fParticleChange->SetProposedKineticEnergy(finalE);
   }
 }

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◆ SetCurrentElement()

void G4eBremsstrahlungRelModel::SetCurrentElement ( const G4double Z )

inlineprotected

Definition at line 189 of file G4eBremsstrahlungRelModel.hh.

 {
   if(Z != currentZ) {
     currentZ = Z;
 
     G4int iz = G4lrint(Z);
     z13 = nist->GetZ13(iz);
     z23 = z13*z13;
     lnZ = nist->GetLOGZ(iz);
 
     if (iz <= 4) {
       Fel = Fel_light[iz];  
       Finel = Finel_light[iz] ; 
     }
     else {
       G4double lnzt = lnZ/3.;
       Fel = facFel - lnzt;
       Finel = facFinel - 2*lnzt;
     }
 
     fCoulomb = GetCurrentElement()->GetfCoulomb();
     fMax = Fel-fCoulomb + Finel/currentZ  +  (1.+1./currentZ)/12.;
   }
 }

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◆ SetLowestKinEnergy()

void G4eBremsstrahlungRelModel::SetLowestKinEnergy ( G4double val )

inline

Definition at line 260 of file G4eBremsstrahlungRelModel.hh.

 {
   lowestKinEnergy = val;
 }

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◆ SetLPMconstant()

void G4eBremsstrahlungRelModel::SetLPMconstant ( G4double val )

inline

Definition at line 247 of file G4eBremsstrahlungRelModel.hh.

 {
   fLPMconstant = val;
 }

◆ SetParticle()

void G4eBremsstrahlungRelModel::SetParticle ( const G4ParticleDefinition * p )

private

Definition at line 139 of file G4eBremsstrahlungRelModel.cc.

 {
   particle = p;
   particleMass = p->GetPDGMass();
   if(p == G4Electron::Electron()) { isElectron = true; }
   else                            { isElectron = false;}
 }

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◆ SetupForMaterial()

void G4eBremsstrahlungRelModel::SetupForMaterial	(	const G4ParticleDefinition *	,
		const G4Material *	mat,
		G4double	kineticEnergy
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 149 of file G4eBremsstrahlungRelModel.cc.

 {
   densityFactor = mat->GetElectronDensity()*fMigdalConstant;
   lpmEnergy = mat->GetRadlen()*fLPMconstant;
 
   // Threshold for LPM effect (i.e. below which LPM hidden by density effect) 
   if (LPMFlag()) {
     energyThresholdLPM=sqrt(densityFactor)*lpmEnergy;
   } else {
      energyThresholdLPM=1.e39;   // i.e. do not use LPM effect
   }
   // calculate threshold for density effect
   kinEnergy   = kineticEnergy;
   totalEnergy = kineticEnergy + particleMass;
   densityCorr = densityFactor*totalEnergy*totalEnergy;
 
   // define critical gamma energies (important for integration/dicing)
   klpm=totalEnergy*totalEnergy/lpmEnergy;
   kp=sqrt(densityCorr);    
 }

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Member Data Documentation

◆ bremFactor

G4double G4eBremsstrahlungRelModel::bremFactor

protected

Definition at line 145 of file G4eBremsstrahlungRelModel.hh.

◆ currentZ

G4double G4eBremsstrahlungRelModel::currentZ

protected

Definition at line 151 of file G4eBremsstrahlungRelModel.hh.

◆ densityCorr

G4double G4eBremsstrahlungRelModel::densityCorr

protected

Definition at line 153 of file G4eBremsstrahlungRelModel.hh.

◆ densityFactor

G4double G4eBremsstrahlungRelModel::densityFactor

protected

Definition at line 152 of file G4eBremsstrahlungRelModel.hh.

◆ energyThresholdLPM

G4double G4eBremsstrahlungRelModel::energyThresholdLPM

private

Definition at line 167 of file G4eBremsstrahlungRelModel.hh.

◆ facFel

G4double G4eBremsstrahlungRelModel::facFel

private

Definition at line 168 of file G4eBremsstrahlungRelModel.hh.

◆ facFinel

G4double G4eBremsstrahlungRelModel::facFinel

private

Definition at line 168 of file G4eBremsstrahlungRelModel.hh.

◆ fCoulomb

G4double G4eBremsstrahlungRelModel::fCoulomb

private

Definition at line 173 of file G4eBremsstrahlungRelModel.hh.

◆ Fel

G4double G4eBremsstrahlungRelModel::Fel

private

Definition at line 173 of file G4eBremsstrahlungRelModel.hh.

◆ Fel_light

const G4double G4eBremsstrahlungRelModel::Fel_light = {0., 5.31 , 4.79 , 4.74 , 4.71}

staticprivate

Definition at line 160 of file G4eBremsstrahlungRelModel.hh.

◆ fGLPM

G4PhysicsVector * G4eBremsstrahlungRelModel::fGLPM

private

Definition at line 177 of file G4eBremsstrahlungRelModel.hh.

◆ Finel

G4double G4eBremsstrahlungRelModel::Finel

private

Definition at line 173 of file G4eBremsstrahlungRelModel.hh.

◆ Finel_light

const G4double G4eBremsstrahlungRelModel::Finel_light = {0., 6.144 , 5.621 , 5.805 , 5.924}

staticprivate

Definition at line 161 of file G4eBremsstrahlungRelModel.hh.

◆ fLPMconstant

G4double G4eBremsstrahlungRelModel::fLPMconstant

private

Definition at line 166 of file G4eBremsstrahlungRelModel.hh.

◆ fMax

G4double G4eBremsstrahlungRelModel::fMax

private

Definition at line 173 of file G4eBremsstrahlungRelModel.hh.

◆ fMigdalConstant

G4double G4eBremsstrahlungRelModel::fMigdalConstant

private

Definition at line 165 of file G4eBremsstrahlungRelModel.hh.

◆ fParticleChange

G4ParticleChangeForLoss* G4eBremsstrahlungRelModel::fParticleChange

protected

Definition at line 143 of file G4eBremsstrahlungRelModel.hh.

◆ fPhiLPM

G4PhysicsVector * G4eBremsstrahlungRelModel::fPhiLPM

private

Definition at line 177 of file G4eBremsstrahlungRelModel.hh.

◆ fXiLPM

G4PhysicsVector* G4eBremsstrahlungRelModel::fXiLPM

private

Definition at line 177 of file G4eBremsstrahlungRelModel.hh.

◆ gLPM

G4double G4eBremsstrahlungRelModel::gLPM

private

Definition at line 178 of file G4eBremsstrahlungRelModel.hh.

◆ isElectron

G4bool G4eBremsstrahlungRelModel::isElectron

protected

Definition at line 155 of file G4eBremsstrahlungRelModel.hh.

◆ kinEnergy

G4double G4eBremsstrahlungRelModel::kinEnergy

protected

Definition at line 149 of file G4eBremsstrahlungRelModel.hh.

◆ klpm

G4double G4eBremsstrahlungRelModel::klpm

private

Definition at line 181 of file G4eBremsstrahlungRelModel.hh.

◆ kp

G4double G4eBremsstrahlungRelModel::kp

private

Definition at line 181 of file G4eBremsstrahlungRelModel.hh.

◆ lnZ

G4double G4eBremsstrahlungRelModel::lnZ

private

Definition at line 172 of file G4eBremsstrahlungRelModel.hh.

◆ logTwo

G4double G4eBremsstrahlungRelModel::logTwo

private

Definition at line 169 of file G4eBremsstrahlungRelModel.hh.

◆ lowestKinEnergy

G4double G4eBremsstrahlungRelModel::lowestKinEnergy

private

Definition at line 164 of file G4eBremsstrahlungRelModel.hh.

◆ lpmEnergy

G4double G4eBremsstrahlungRelModel::lpmEnergy

private

Definition at line 176 of file G4eBremsstrahlungRelModel.hh.

◆ nist

G4NistManager* G4eBremsstrahlungRelModel::nist

protected

Definition at line 140 of file G4eBremsstrahlungRelModel.hh.

◆ particle

const G4ParticleDefinition* G4eBremsstrahlungRelModel::particle

protected

Definition at line 141 of file G4eBremsstrahlungRelModel.hh.

◆ particleMass

G4double G4eBremsstrahlungRelModel::particleMass

protected

Definition at line 148 of file G4eBremsstrahlungRelModel.hh.

◆ phiLPM

G4double G4eBremsstrahlungRelModel::phiLPM

private

Definition at line 178 of file G4eBremsstrahlungRelModel.hh.

◆ preS1

G4double G4eBremsstrahlungRelModel::preS1

private

Definition at line 169 of file G4eBremsstrahlungRelModel.hh.

◆ theGamma

G4ParticleDefinition* G4eBremsstrahlungRelModel::theGamma

protected

Definition at line 142 of file G4eBremsstrahlungRelModel.hh.

◆ totalEnergy

G4double G4eBremsstrahlungRelModel::totalEnergy

protected

Definition at line 150 of file G4eBremsstrahlungRelModel.hh.

◆ use_completescreening

G4bool G4eBremsstrahlungRelModel::use_completescreening

private

Definition at line 184 of file G4eBremsstrahlungRelModel.hh.

◆ wgi

const G4double G4eBremsstrahlungRelModel::wgi

staticprivate

Initial value:

={ 0.0506, 0.1112, 0.1569, 0.1813,

0.1813, 0.1569, 0.1112, 0.0506 }

Definition at line 159 of file G4eBremsstrahlungRelModel.hh.

◆ xgi

const G4double G4eBremsstrahlungRelModel::xgi

staticprivate

Initial value:

={ 0.0199, 0.1017, 0.2372, 0.4083,

0.5917, 0.7628, 0.8983, 0.9801 }

Definition at line 159 of file G4eBremsstrahlungRelModel.hh.

◆ xiLPM

G4double G4eBremsstrahlungRelModel::xiLPM

private

Definition at line 178 of file G4eBremsstrahlungRelModel.hh.

◆ z13

G4double G4eBremsstrahlungRelModel::z13

private

Definition at line 172 of file G4eBremsstrahlungRelModel.hh.

◆ z23

G4double G4eBremsstrahlungRelModel::z23

private

Definition at line 172 of file G4eBremsstrahlungRelModel.hh.

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

Private Attributes
G4double	lowestKinEnergy

G4double	fMigdalConstant

G4double	fLPMconstant

G4double	energyThresholdLPM

G4double	facFel

G4double	facFinel

G4double	preS1

G4double	logTwo

G4double	z13

G4double	z23

G4double	lnZ

G4double	Fel

G4double	Finel

G4double	fCoulomb

G4double	fMax

G4double	lpmEnergy

G4PhysicsVector *	fXiLPM

G4PhysicsVector *	fPhiLPM

G4PhysicsVector *	fGLPM

G4double	xiLPM

G4double	phiLPM

G4double	gLPM

G4double	klpm

G4double	kp

G4bool	use_completescreening

Public Member Functions

Protected Member Functions

Protected Attributes

Private Member Functions

Private Attributes

Static Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ G4eBremsstrahlungRelModel() [1/2]

◆ ~G4eBremsstrahlungRelModel()

◆ G4eBremsstrahlungRelModel() [2/2]

Member Function Documentation

◆ CalcLPMFunctions()

◆ ComputeBremLoss()

◆ ComputeCrossSectionPerAtom()

◆ ComputeDEDXPerVolume()

◆ ComputeDXSectionPerAtom()

◆ ComputeRelDXSectionPerAtom()

◆ ComputeXSectionPerAtom()

◆ Initialise()

◆ InitialiseConstants()

◆ InitialiseLocal()

◆ LowestKinEnergy()

◆ LPMconstant()

◆ MinPrimaryEnergy()

◆ operator=()

◆ Phi1()

◆ Phi1M2()

◆ Psi1()

◆ Psi1M2()

◆ SampleSecondaries()

◆ SetCurrentElement()

◆ SetLowestKinEnergy()

◆ SetLPMconstant()

◆ SetParticle()

◆ SetupForMaterial()

Member Data Documentation

◆ bremFactor

◆ currentZ

◆ densityCorr

◆ densityFactor

◆ energyThresholdLPM

◆ facFel

◆ facFinel

◆ fCoulomb

◆ Fel

◆ Fel_light

◆ fGLPM

◆ Finel

◆ Finel_light

◆ fLPMconstant

◆ fMax

◆ fMigdalConstant

◆ fParticleChange

◆ fPhiLPM

◆ fXiLPM

◆ gLPM

◆ isElectron

◆ kinEnergy

◆ klpm

◆ kp

◆ lnZ

◆ logTwo

◆ lowestKinEnergy

◆ lpmEnergy

◆ nist

◆ particle

◆ particleMass

◆ phiLPM

◆ preS1

◆ theGamma

◆ totalEnergy

◆ use_completescreening

◆ wgi

◆ xgi

◆ xiLPM

◆ z13

◆ z23