#include <G4hPairProductionModel.hh>

Inheritance diagram for G4hPairProductionModel:

Public Member Functions
	G4hPairProductionModel (const G4ParticleDefinition *p=0, const G4String &nam="hPairProd")

virtual	~G4hPairProductionModel ()

Public Member Functions inherited from G4MuPairProductionModel
	G4MuPairProductionModel (const G4ParticleDefinition *p=0, const G4String &nam="muPairProd")

virtual	~G4MuPairProductionModel ()

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

virtual void	InitialiseLocal (const G4ParticleDefinition , G4VEmModel masterModel)

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

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

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

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

void	SetLowestKineticEnergy (G4double e)

void	SetParticle (const G4ParticleDefinition *)

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	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 *)

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

Protected Member Functions
virtual G4double	ComputeDMicroscopicCrossSection (G4double tkin, G4double Z, G4double pairEnergy)

Protected Member Functions inherited from G4MuPairProductionModel
G4double	ComputMuPairLoss (G4double Z, G4double tkin, G4double cut, G4double tmax)

G4double	ComputeMicroscopicCrossSection (G4double tkin, G4double Z, G4double cut)

G4double	MaxSecondaryEnergyForElement (G4double kineticEnergy, G4double Z)

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 G4MuPairProductionModel
const G4ParticleDefinition *	particle

G4NistManager *	nist

G4double	factorForCross

G4double	sqrte

G4double	particleMass

G4double	z13

G4double	z23

G4double	lnZ

G4int	currentZ

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 G4MuPairProductionModel
static const G4double	xgi [8]

static const G4double	wgi [8]

Detailed Description

Definition at line 56 of file G4hPairProductionModel.hh.

Constructor & Destructor Documentation

G4hPairProductionModel::G4hPairProductionModel	(	const G4ParticleDefinition *	p = `0`,
		const G4String &	nam = `"hPairProd"`
	)

Definition at line 58 of file G4hPairProductionModel.cc.

60 : G4MuPairProductionModel(p, nam)

61 {}

G4MuPairProductionModel::G4MuPairProductionModel

G4MuPairProductionModel(const G4ParticleDefinition *p=0, const G4String &nam="muPairProd")

Definition: G4MuPairProductionModel.cc:104

G4hPairProductionModel::~G4hPairProductionModel ( )

virtual

Definition at line 65 of file G4hPairProductionModel.cc.

66 {}

Member Function Documentation

G4double G4hPairProductionModel::ComputeDMicroscopicCrossSection	(	G4double	tkin,
		G4double	Z,
		G4double	pairEnergy
	)

protectedvirtual

Reimplemented from G4MuPairProductionModel.

Definition at line 70 of file G4hPairProductionModel.cc.

References python.hepunit::electron_mass_c2, G4MuPairProductionModel::factorForCross, fe, fm, G4Exp(), G4Log(), G4MuPairProductionModel::particleMass, G4MuPairProductionModel::sqrte, G4MuPairProductionModel::wgi, G4MuPairProductionModel::xgi, G4InuclParticleNames::xi0, G4MuPairProductionModel::z13, and G4MuPairProductionModel::z23.

 {
   static const G4double bbbtf= 183. ;
   static const G4double bbbh = 202.4 ;
   static const G4double g1tf = 1.95e-5 ;
   static const G4double g2tf = 5.3e-5 ;
   static const G4double g1h  = 4.4e-5 ;
   static const G4double g2h  = 4.8e-5 ;
 
   G4double totalEnergy  = tkin + particleMass;
   G4double residEnergy  = totalEnergy - pairEnergy;
   G4double massratio    = particleMass/electron_mass_c2 ;
   G4double massratio2   = massratio*massratio ;
   G4double cross = 0.;
 
   G4double c3 = 0.75*sqrte*particleMass;
   if (residEnergy <= c3*z13) { return cross; }
 
   G4double c7 = 4.*CLHEP::electron_mass_c2;
   G4double c8 = 6.*particleMass*particleMass;
   G4double alf = c7/pairEnergy;
   G4double a3 = 1. - alf;
   if (a3 <= 0.) { return cross; }
 
   // zeta calculation
   G4double bbb,g1,g2;
   if( Z < 1.5 ) { bbb = bbbh ; g1 = g1h ; g2 = g2h ; }
   else          { bbb = bbbtf; g1 = g1tf; g2 = g2tf; }
 
   G4double zeta = 0;
   G4double zeta1 = 
     0.073*G4Log(totalEnergy/(particleMass+g1*z23*totalEnergy))-0.26;
   if ( zeta1 > 0.)
   {
     G4double zeta2 = 
       0.058*G4Log(totalEnergy/(particleMass+g2*z13*totalEnergy))-0.14;
     zeta  = zeta1/zeta2 ;
   }
 
   G4double z2 = Z*(Z+zeta);
   G4double screen0 = 2.*electron_mass_c2*sqrte*bbb/(z13*pairEnergy);
   G4double a0 = totalEnergy*residEnergy;
   G4double a1 = pairEnergy*pairEnergy/a0;
   G4double bet = 0.5*a1;
   G4double xi0 = 0.25*massratio2*a1;
   G4double del = c8/a0;
 
   G4double rta3 = sqrt(a3);
   G4double tmnexp = alf/(1. + rta3) + del*rta3;
   if(tmnexp >= 1.0) { return cross; }
 
   G4double tmn = G4Log(tmnexp);
   G4double sum = 0.;
 
   // Gaussian integration in ln(1-ro) ( with 8 points)
   for (G4int i=0; i<8; i++)
   {
     G4double a4 = G4Exp(tmn*xgi[i]);     // a4 = (1.-asymmetry)
     G4double a5 = a4*(2.-a4) ;
     G4double a6 = 1.-a5 ;
     G4double a7 = 1.+a6 ;
     G4double a9 = 3.+a6 ;
     G4double xi = xi0*a5 ;
     G4double xii = 1./xi ;
     G4double xi1 = 1.+xi ;
     G4double screen = screen0*xi1/a5 ;
     G4double yeu = 5.-a6+4.*bet*a7 ;
     G4double yed = 2.*(1.+3.*bet)*G4Log(3.+xii)-a6-a1*(2.-a6) ;
     G4double ye1 = 1.+yeu/yed ;
     G4double ale=G4Log(bbb/z13*sqrt(xi1*ye1)/(1.+screen*ye1)) ;
     G4double cre = 0.5*G4Log(1.+2.25*z23*xi1*ye1/massratio2) ;
     G4double be;
 
     if (xi <= 1.e3) {
       be = ((2.+a6)*(1.+bet)+xi*a9)*G4Log(1.+xii)+(a5-bet)/xi1-a9;
     } else {
       be = (3.-a6+a1*a7)/(2.*xi);
     }
     G4double fe = (ale-cre)*be;
     if ( fe < 0.) { fe = 0.; }
 
     G4double ymu = 4.+a6 +3.*bet*a7 ;
     G4double ymd = a7*(1.5+a1)*G4Log(3.+xi)+1.-1.5*a6 ;
     G4double ym1 = 1.+ymu/ymd ;
     G4double alm_crm = G4Log(bbb*massratio/(1.5*z23*(1.+screen*ym1)));
     G4double a10,bm;
     if ( xi >= 1.e-3)
     {
       a10 = (1.+a1)*a5 ;
       bm  = (a7*(1.+1.5*bet)-a10*xii)*G4Log(xi1)+xi*(a5-bet)/xi1+a10;
     } else {
       bm = (5.-a6+bet*a9)*(xi/2.);
     }
 
     G4double fm = alm_crm*bm;
     if ( fm < 0.) { fm = 0.; }
 
     sum += wgi[i]*a4*(fe+fm/massratio2);
   }
 
   cross = -tmn*sum*factorForCross*z2*residEnergy/(totalEnergy*pairEnergy);
 
   return cross;
 }

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

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation