#include <G4BetheHeitlerModel.hh>

Inheritance diagram for G4BetheHeitlerModel:

Classes
struct	ElementData

Public Member Functions
	G4BetheHeitlerModel (const G4ParticleDefinition *p=nullptr, const G4String &nam="BetheHeitler")

	~G4BetheHeitlerModel () override

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

void	InitialiseLocal (const G4ParticleDefinition , G4VEmModel masterModel) override

G4double	ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double kinEnergy, G4double Z, G4double A=0., G4double cut=0., G4double emax=DBL_MAX) override

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

G4BetheHeitlerModel &	operator= (const G4BetheHeitlerModel &right)=delete

	G4BetheHeitlerModel (const G4BetheHeitlerModel &)=delete

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 , const G4double &length, G4double &eloss)

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	FillNumberOfSecondaries (G4int &numberOfTriplets, G4int &numberOfRecoil)

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)

const G4Element *	SelectRandomAtom (const G4MaterialCutsCouple , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

const G4Element *	SelectTargetAtom (const G4MaterialCutsCouple , const G4ParticleDefinition , G4double kineticEnergy, G4double logKineticEnergy, 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)

const G4Element *	GetCurrentElement (const G4Material *mat=nullptr) const

G4int	SelectRandomAtomNumber (const G4Material *) const

const G4Isotope *	GetCurrentIsotope (const G4Element *elm=nullptr) const

G4int	SelectIsotopeNumber (const G4Element *) const

void	SetParticleChange (G4VParticleChange , G4VEmFluctuationModel f=nullptr)

void	SetCrossSectionTable (G4PhysicsTable *, G4bool isLocal)

G4ElementData *	GetElementData ()

G4PhysicsTable *	GetCrossSectionTable ()

G4VEmFluctuationModel *	GetModelOfFluctuations ()

G4VEmAngularDistribution *	GetAngularDistribution ()

G4VEmModel *	GetTripletModel ()

void	SetTripletModel (G4VEmModel *)

void	SetAngularDistribution (G4VEmAngularDistribution *)

G4double	HighEnergyLimit () const

G4double	LowEnergyLimit () const

G4double	HighEnergyActivationLimit () const

G4double	LowEnergyActivationLimit () const

G4double	PolarAngleLimit () const

G4double	SecondaryThreshold () 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) const

void	SetPolarAngleLimit (G4double)

void	SetSecondaryThreshold (G4double)

void	SetDeexcitationFlag (G4bool val)

void	SetForceBuildTable (G4bool val)

void	SetFluctuationFlag (G4bool val)

G4bool	IsMaster () const

void	SetUseBaseMaterials (G4bool val)

G4bool	UseBaseMaterials () const

G4double	MaxSecondaryKinEnergy (const G4DynamicParticle *dynParticle)

const G4String &	GetName () const

void	SetCurrentCouple (const G4MaterialCutsCouple *)

G4bool	IsLocked () const

void	SetLocked (G4bool)

void	SetLPMFlag (G4bool)

void	SetMasterThread (G4bool)

G4VEmModel &	operator= (const G4VEmModel &right)=delete

	G4VEmModel (const G4VEmModel &)=delete

Protected Member Functions
G4double	ScreenFunction1 (const G4double delta)

G4double	ScreenFunction2 (const G4double delta)

void	ScreenFunction12 (const G4double delta, G4double &f1, G4double &f2)

void	InitialiseElementData ()

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
G4Pow *	fG4Calc

const G4ParticleDefinition *	fTheGamma

const G4ParticleDefinition *	fTheElectron

const G4ParticleDefinition *	fThePositron

G4ParticleChangeForGamma *	fParticleChange

G4EmElementXS *	fXSection {nullptr}

G4bool	isFirstInstance {false}

G4bool	useEPICS2017 {false}

Protected Attributes inherited from G4VEmModel
G4ElementData *	fElementData = nullptr

G4VParticleChange *	pParticleChange = nullptr

G4PhysicsTable *	xSectionTable = nullptr

const G4Material *	pBaseMaterial = nullptr

const std::vector< G4double > *	theDensityFactor = nullptr

const std::vector< G4int > *	theDensityIdx = nullptr

G4double	inveplus

G4double	pFactor = 1.0

std::size_t	currentCoupleIndex = 0

std::size_t	basedCoupleIndex = 0

G4bool	lossFlucFlag = true

Static Protected Attributes
static const G4int	gMaxZet = 120

static std::vector< ElementData * >	gElementData

Detailed Description

Definition at line 61 of file G4BetheHeitlerModel.hh.

Constructor & Destructor Documentation

◆ G4BetheHeitlerModel() [1/2]

G4BetheHeitlerModel::G4BetheHeitlerModel	(	const G4ParticleDefinition *	p = nullptr,
		const G4String &	nam = "BetheHeitler" )

explicit

Definition at line 68 of file G4BetheHeitlerModel.cc.

: G4VEmModel(nam), 
  fG4Calc(G4Pow::GetInstance()), fTheGamma(G4Gamma::Gamma()),
  fTheElectron(G4Electron::Electron()), fThePositron(G4Positron::Positron()),
  fParticleChange(nullptr) 
{
  SetAngularDistribution(new G4ModifiedTsai());
}

Referenced by G4BetheHeitlerModel(), G4PolarizedGammaConversionModel::G4PolarizedGammaConversionModel(), and operator=().

◆ ~G4BetheHeitlerModel()

G4BetheHeitlerModel::~G4BetheHeitlerModel ( )

override

Definition at line 78 of file G4BetheHeitlerModel.cc.

{
  if (isFirstInstance) {
    for (auto const & ptr : gElementData) { delete ptr; }
    gElementData.clear(); 
  }
  delete fXSection;
}

◆ G4BetheHeitlerModel() [2/2]

G4BetheHeitlerModel::G4BetheHeitlerModel ( const G4BetheHeitlerModel & )

delete

Member Function Documentation

◆ ComputeCrossSectionPerAtom()

G4double G4BetheHeitlerModel::ComputeCrossSectionPerAtom	(	const G4ParticleDefinition *	,
		G4double	kinEnergy,
		G4double	Z,
		G4double	A = 0.,
		G4double	cut = 0.,
		G4double	emax = DBL_MAX )

overridevirtual

Reimplemented from G4VEmModel.

Definition at line 127 of file G4BetheHeitlerModel.cc.

{
  G4double xSection = 0.0 ;
  // short versions
  static const G4double kMC2  = CLHEP::electron_mass_c2;
  // zero cross section below the kinematical limit: Eg<2mc^2
  if (Z < 0.9 || gammaEnergy <= 2.0*kMC2) { return xSection; }
 
  G4int iZ = G4lrint(Z);
  if (useEPICS2017 && iZ < 101) {
    return fXSection->GetXS(iZ, gammaEnergy);
  }
 
  //
  static const G4double gammaEnergyLimit = 1.5*CLHEP::MeV;
  // set coefficients a, b c
  static const G4double a0 =  8.7842e+2*CLHEP::microbarn;
  static const G4double a1 = -1.9625e+3*CLHEP::microbarn; 
  static const G4double a2 =  1.2949e+3*CLHEP::microbarn;
  static const G4double a3 = -2.0028e+2*CLHEP::microbarn; 
  static const G4double a4 =  1.2575e+1*CLHEP::microbarn; 
  static const G4double a5 = -2.8333e-1*CLHEP::microbarn;
  
  static const G4double b0 = -1.0342e+1*CLHEP::microbarn;
  static const G4double b1 =  1.7692e+1*CLHEP::microbarn;
  static const G4double b2 = -8.2381   *CLHEP::microbarn;
  static const G4double b3 =  1.3063   *CLHEP::microbarn;
  static const G4double b4 = -9.0815e-2*CLHEP::microbarn;
  static const G4double b5 =  2.3586e-3*CLHEP::microbarn;
  
  static const G4double c0 = -4.5263e+2*CLHEP::microbarn;
  static const G4double c1 =  1.1161e+3*CLHEP::microbarn; 
  static const G4double c2 = -8.6749e+2*CLHEP::microbarn;
  static const G4double c3 =  2.1773e+2*CLHEP::microbarn; 
  static const G4double c4 = -2.0467e+1*CLHEP::microbarn;
  static const G4double c5 =  6.5372e-1*CLHEP::microbarn;
  // check low energy limit of the approximation (1.5 MeV)
  G4double gammaEnergyOrg = gammaEnergy;
  if (gammaEnergy < gammaEnergyLimit) { gammaEnergy = gammaEnergyLimit; }
  // compute gamma energy variables
  const G4double x  = G4Log(gammaEnergy/kMC2);
  const G4double x2 = x *x; 
  const G4double x3 = x2*x;
  const G4double x4 = x3*x;
  const G4double x5 = x4*x;
  //
  const G4double F1 = a0 + a1*x + a2*x2 + a3*x3 + a4*x4 + a5*x5;
  const G4double F2 = b0 + b1*x + b2*x2 + b3*x3 + b4*x4 + b5*x5;
  const G4double F3 = c0 + c1*x + c2*x2 + c3*x3 + c4*x4 + c5*x5;     
  // compute the approximated cross section 
  xSection = (Z + 1.)*(F1*Z + F2*Z*Z + F3);
  // check if we are below the limit of the approximation and apply correction
  if (gammaEnergyOrg < gammaEnergyLimit) {
    const G4double dum = (gammaEnergyOrg-2.*kMC2)/(gammaEnergyLimit-2.*kMC2);
    xSection *= dum*dum;
  }
  // make sure that the cross section is never negative
  xSection = std::max(xSection, 0.); 
  return xSection;
}

◆ Initialise()

void G4BetheHeitlerModel::Initialise	(	const G4ParticleDefinition *	p,
		const G4DataVector &	cuts )

overridevirtual

Implements G4VEmModel.

Reimplemented in G4PolarizedGammaConversionModel.

Definition at line 87 of file G4BetheHeitlerModel.cc.

{
  if (!fParticleChange) { fParticleChange = GetParticleChangeForGamma(); }
 
  if (isFirstInstance || gElementData.empty()) {
    G4AutoLock l(&theBetheHMutex);
    if (gElementData.empty()) {
      isFirstInstance = true;
      gElementData.resize(gMaxZet+1, nullptr);
 
      // EPICS2017 flag should be checked only once
      useEPICS2017 = G4EmParameters::Instance()->UseEPICS2017XS();
      if (useEPICS2017) {
    fXSection = new G4EmElementXS(1, 100, "convEPICS2017", "/epics2017/pair/pp-cs-");
      }
    }
    // static data should be initialised only in the one instance
    InitialiseElementData();
    l.unlock();
  }
  // element selectors should be initialised in the master thread
  if(IsMaster()) {
    InitialiseElementSelectors(p, cuts); 
  }
}

Referenced by G4PolarizedGammaConversionModel::Initialise().

◆ InitialiseElementData()

void G4BetheHeitlerModel::InitialiseElementData ( )

protected

Definition at line 323 of file G4BetheHeitlerModel.cc.

{
  // create for all elements that are in the detector
  auto elemTable = G4Element::GetElementTable();
  for (auto const & elem : *elemTable) {
    const G4int Z = elem->GetZasInt();
    const G4int iz = std::min(gMaxZet, Z);
    if (nullptr == gElementData[iz]) { // create it if doesn't exist yet
      G4double FZLow     = 8.*elem->GetIonisation()->GetlogZ3();
      G4double FZHigh    = FZLow + 8.*elem->GetfCoulomb();
      auto elD           = new ElementData();
      elD->fDeltaMaxLow  = G4Exp((42.038 - FZLow )/8.29) - 0.958;
      elD->fDeltaMaxHigh = G4Exp((42.038 - FZHigh)/8.29) - 0.958;
      gElementData[iz]   = elD;
    }
    if (useEPICS2017 && Z < 101) {
      fXSection->Retrieve(Z);
    }
  }
  
}

Referenced by Initialise().

◆ InitialiseLocal()

void G4BetheHeitlerModel::InitialiseLocal	(	const G4ParticleDefinition *	,
		G4VEmModel *	masterModel )

overridevirtual

Reimplemented from G4VEmModel.

Definition at line 114 of file G4BetheHeitlerModel.cc.

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

◆ operator=()

G4BetheHeitlerModel & G4BetheHeitlerModel::operator= ( const G4BetheHeitlerModel & right )

delete

◆ SampleSecondaries()

void G4BetheHeitlerModel::SampleSecondaries	(	std::vector< G4DynamicParticle * > *	fvect,
		const G4MaterialCutsCouple *	couple,
		const G4DynamicParticle *	aDynamicGamma,
		G4double	tmin,
		G4double	maxEnergy )

overridevirtual

Implements G4VEmModel.

Reimplemented in G4PolarizedGammaConversionModel.

Definition at line 202 of file G4BetheHeitlerModel.cc.

{
  // set some constant values
  const G4double    gammaEnergy = aDynamicGamma->GetKineticEnergy();
  const G4double    eps0        = CLHEP::electron_mass_c2/gammaEnergy;
  //
  // check kinematical limit: gamma energy(Eg) must be at least 2 e- rest mass
  if (eps0 > 0.5) { return; }
  //
  // select target element of the material (probs. are based on partial x-secs)
  const G4Element* anElement = SelectTargetAtom(couple, fTheGamma, gammaEnergy,
                                          aDynamicGamma->GetLogKineticEnergy());
 
  // 
  // get the random engine
  CLHEP::HepRandomEngine* rndmEngine = G4Random::getTheEngine();
  //
  // 'eps' is the total energy transferred to one of the e-/e+ pair in initial
  // gamma energy units Eg. Since the corresponding DCS is symmetric on eps=0.5,
  // the kinematical limits for eps0=mc^2/Eg <= eps <= 0.5 
  // 1. 'eps' is sampled uniformly on the [eps0, 0.5] inteval if Eg<Egsmall 
  // 2. otherwise, on the [eps_min, 0.5] interval according to the DCS (case 2.) 
  G4double eps;
  // case 1.
  static const G4double Egsmall = 2.*CLHEP::MeV;
  if (gammaEnergy < Egsmall) {
    eps = eps0 + (0.5-eps0)*rndmEngine->flat();
  } else {
  // case 2.
    // get the Coulomb factor for the target element (Z) and gamma energy (Eg)
    // F(Z) = 8*ln(Z)/3           if Eg <= 50 [MeV] => no Coulomb correction
    // F(Z) = 8*ln(Z)/3 + 8*fc(Z) if Eg  > 50 [MeV] => fc(Z) is the Coulomb cor.
    //
    // The screening variable 'delta(eps)' = 136*Z^{-1/3}*eps0/[eps(1-eps)]
    // Due to the Coulomb correction, the DCS can go below zero even at 
    // kinematicaly allowed eps > eps0 values. In order to exclude this eps 
    // range with negative DCS, the minimum eps value will be set to eps_min = 
    // max[eps0, epsp] with epsp is the solution of SF(delta(epsp)) - F(Z)/2 = 0 
    // with SF being the screening function (SF1=SF2 at high value of delta). 
    // The solution is epsp = 0.5 - 0.5*sqrt[ 1 - 4*136*Z^{-1/3}eps0/deltap] 
    // with deltap = Exp[(42.038-F(Z))/8.29]-0.958. So the limits are:
    // - when eps=eps_max = 0.5            => delta_min = 136*Z^{-1/3}*eps0/4
    // - epsp = 0.5 - 0.5*sqrt[ 1 - delta_min/deltap]
    // - and eps_min = max[eps0, epsp]  
    static const G4double midEnergy = 50.*CLHEP::MeV;
    const  G4int           iZet = std::min(gMaxZet, anElement->GetZasInt());   
    const  G4double deltaFactor = 136.*eps0/anElement->GetIonisation()->GetZ3();
    G4double           deltaMax = gElementData[iZet]->fDeltaMaxLow;
    G4double                 FZ = 8.*anElement->GetIonisation()->GetlogZ3();
    if (gammaEnergy > midEnergy) { 
      FZ      += 8.*(anElement->GetfCoulomb()); 
      deltaMax = gElementData[iZet]->fDeltaMaxHigh;
    }
    const G4double deltaMin = 4.*deltaFactor; 
    // 
    // compute the limits of eps
    const G4double epsp     = 0.5 - 0.5*std::sqrt(1. - deltaMin/deltaMax) ;
    const G4double epsMin   = std::max(eps0,epsp);
    const G4double epsRange = 0.5 - epsMin;
    //
    // sample the energy rate (eps) of the created electron (or positron)
    G4double F10, F20;
    ScreenFunction12(deltaMin, F10, F20); 
    F10 -= FZ;
    F20 -= FZ; 
    const G4double NormF1   = std::max(F10 * epsRange * epsRange, 0.); 
    const G4double NormF2   = std::max(1.5 * F20                , 0.);
    const G4double NormCond = NormF1/(NormF1 + NormF2); 
    // we will need 3 uniform random number for each trial of sampling 
    G4double rndmv[3];
    G4double greject = 0.;
    do {
      rndmEngine->flatArray(3, rndmv);
      if (NormCond > rndmv[0]) {
        eps = 0.5 - epsRange * fG4Calc->A13(rndmv[1]);
        const G4double delta = deltaFactor/(eps*(1.-eps));
        greject = (ScreenFunction1(delta)-FZ)/F10;
      } else { 
        eps = epsMin + epsRange*rndmv[1];
        const G4double delta = deltaFactor/(eps*(1.-eps));
        greject = (ScreenFunction2(delta)-FZ)/F20;
      }
      // Loop checking, 03-Aug-2015, Vladimir Ivanchenko
    } while (greject < rndmv[2]);
  } //  end of eps sampling
  //
  // select charges randomly
  G4double eTotEnergy, pTotEnergy;
  if (rndmEngine->flat() > 0.5) {
    eTotEnergy = (1.-eps)*gammaEnergy;
    pTotEnergy = eps*gammaEnergy; 
  } else {
    pTotEnergy = (1.-eps)*gammaEnergy;
    eTotEnergy = eps*gammaEnergy;
  }
  //
  // sample pair kinematics
  const G4double eKinEnergy = std::max(0.,eTotEnergy - CLHEP::electron_mass_c2);
  const G4double pKinEnergy = std::max(0.,pTotEnergy - CLHEP::electron_mass_c2);
  //
  G4ThreeVector eDirection, pDirection;
  //
  GetAngularDistribution()->SamplePairDirections(aDynamicGamma, 
                                                 eKinEnergy, pKinEnergy,
                                                 eDirection, pDirection);
  // create G4DynamicParticle object for the particle1
  auto aParticle1= new G4DynamicParticle(fTheElectron,eDirection,eKinEnergy);
  // create G4DynamicParticle object for the particle2
  auto aParticle2= new G4DynamicParticle(fThePositron,pDirection,pKinEnergy);
  // Fill output vector
  fvect->push_back(aParticle1);
  fvect->push_back(aParticle2);
  // kill incident photon
  fParticleChange->SetProposedKineticEnergy(0.);
  fParticleChange->ProposeTrackStatus(fStopAndKill);   
}

Referenced by G4PolarizedGammaConversionModel::SampleSecondaries().

◆ ScreenFunction1()

G4double G4BetheHeitlerModel::ScreenFunction1 ( const G4double delta )

inlineprotected

Definition at line 141 of file G4BetheHeitlerModel.hh.

{
  return (delta > 1.4) ? 42.038 - 8.29*G4Log(delta + 0.958) 
                       : 42.184 - delta*(7.444 - 1.623*delta);
}

Referenced by SampleSecondaries().

◆ ScreenFunction12()

void G4BetheHeitlerModel::ScreenFunction12	(	const G4double	delta,
		G4double &	f1,
		G4double &	f2 )

inlineprotected

Definition at line 155 of file G4BetheHeitlerModel.hh.

{
  if (delta > 1.4) {
    f1 = 42.038 - 8.29*G4Log(delta + 0.958);
    f2 = f1;
  } else {
    f1 = 42.184 - delta*(7.444 - 1.623*delta);
    f2 = 41.326 - delta*(5.848 - 0.902*delta); 
  }
}

Referenced by SampleSecondaries().

◆ ScreenFunction2()

G4double G4BetheHeitlerModel::ScreenFunction2 ( const G4double delta )

inlineprotected

Definition at line 148 of file G4BetheHeitlerModel.hh.

{
  return (delta > 1.4) ? 42.038 - 8.29*G4Log(delta + 0.958)
                       : 41.326 - delta*(5.848 - 0.902*delta);
}

Referenced by SampleSecondaries().

Member Data Documentation

◆ fG4Calc

G4Pow* G4BetheHeitlerModel::fG4Calc

protected

Definition at line 110 of file G4BetheHeitlerModel.hh.

Referenced by G4BetheHeitlerModel(), and SampleSecondaries().

◆ fParticleChange

G4ParticleChangeForGamma* G4BetheHeitlerModel::fParticleChange

protected

Definition at line 114 of file G4BetheHeitlerModel.hh.

Referenced by G4BetheHeitlerModel(), Initialise(), and SampleSecondaries().

◆ fTheElectron

const G4ParticleDefinition* G4BetheHeitlerModel::fTheElectron

protected

Definition at line 112 of file G4BetheHeitlerModel.hh.

Referenced by G4BetheHeitlerModel(), and SampleSecondaries().

◆ fTheGamma

const G4ParticleDefinition* G4BetheHeitlerModel::fTheGamma

protected

Definition at line 111 of file G4BetheHeitlerModel.hh.

Referenced by G4BetheHeitlerModel(), and SampleSecondaries().

◆ fThePositron

const G4ParticleDefinition* G4BetheHeitlerModel::fThePositron

protected

Definition at line 113 of file G4BetheHeitlerModel.hh.

Referenced by G4BetheHeitlerModel(), and SampleSecondaries().

◆ fXSection

G4EmElementXS* G4BetheHeitlerModel::fXSection {nullptr}

protected

Definition at line 115 of file G4BetheHeitlerModel.hh.

115{nullptr};

Referenced by ComputeCrossSectionPerAtom(), Initialise(), InitialiseElementData(), and ~G4BetheHeitlerModel().

◆ gElementData

std::vector< G4BetheHeitlerModel::ElementData * > G4BetheHeitlerModel::gElementData

staticprotected

Definition at line 120 of file G4BetheHeitlerModel.hh.

Referenced by Initialise(), InitialiseElementData(), SampleSecondaries(), and ~G4BetheHeitlerModel().

◆ gMaxZet

const G4int G4BetheHeitlerModel::gMaxZet = 120

staticprotected

Definition at line 108 of file G4BetheHeitlerModel.hh.

Referenced by Initialise(), InitialiseElementData(), and SampleSecondaries().

◆ isFirstInstance

G4bool G4BetheHeitlerModel::isFirstInstance {false}

protected

Definition at line 117 of file G4BetheHeitlerModel.hh.

117{false};

Referenced by Initialise(), and ~G4BetheHeitlerModel().

◆ useEPICS2017

G4bool G4BetheHeitlerModel::useEPICS2017 {false}

protected

Definition at line 118 of file G4BetheHeitlerModel.hh.

118{false};

Referenced by ComputeCrossSectionPerAtom(), Initialise(), and InitialiseElementData().

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

Classes

Public Member Functions

Protected Member Functions

Protected Attributes

Static Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ G4BetheHeitlerModel() [1/2]

◆ ~G4BetheHeitlerModel()

◆ G4BetheHeitlerModel() [2/2]

Member Function Documentation

◆ ComputeCrossSectionPerAtom()

◆ Initialise()

◆ InitialiseElementData()

◆ InitialiseLocal()

◆ operator=()

◆ SampleSecondaries()

◆ ScreenFunction1()

◆ ScreenFunction12()

◆ ScreenFunction2()

Member Data Documentation

◆ fG4Calc

◆ fParticleChange

◆ fTheElectron

◆ fTheGamma

◆ fThePositron

◆ fXSection

◆ gElementData

◆ gMaxZet

◆ isFirstInstance

◆ useEPICS2017