#include <G4PenelopeRayleighModel.hh>

Inheritance diagram for G4PenelopeRayleighModel:

Collaboration diagram for G4PenelopeRayleighModel:

Public Member Functions
	G4PenelopeRayleighModel (const G4ParticleDefinition *p=0, const G4String &processName="PenRayleigh")

virtual	~G4PenelopeRayleighModel ()

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

virtual void	InitialiseLocal (const G4ParticleDefinition , G4VEmModel masterModel)

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

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

void	SetVerbosityLevel (G4int lev)

G4int	GetVerbosityLevel ()

void	DumpFormFactorTable (const G4Material *)

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, 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)

Protected Attributes
G4ParticleChangeForGamma *	fParticleChange

const G4ParticleDefinition *	fParticle

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
G4PenelopeRayleighModel &	operator= (const G4PenelopeRayleighModel &right)

	G4PenelopeRayleighModel (const G4PenelopeRayleighModel &)

void	SetParticle (const G4ParticleDefinition *)

void	ReadDataFile (G4int)

void	ClearTables ()

void	BuildFormFactorTable (const G4Material *)

void	GetPMaxTable (const G4Material *)

G4double	GetFSquared (const G4Material *, const G4double)

void	InitializeSamplingAlgorithm (const G4Material *)

Private Attributes
G4double	fIntrinsicLowEnergyLimit

G4double	fIntrinsicHighEnergyLimit

G4int	verboseLevel

G4bool	isInitialised

std::map< G4int, G4PhysicsFreeVector * > *	logAtomicCrossSection

std::map< G4int, G4PhysicsFreeVector * > *	atomicFormFactor

G4DataVector	logQSquareGrid

std::map< const G4Material , G4PhysicsFreeVector > *	logFormFactorTable

G4DataVector	logEnergyGridPMax

std::map< const G4Material , G4PhysicsFreeVector > *	pMaxTable

std::map< const G4Material , G4PenelopeSamplingData > *	samplingTable

G4bool	fLocalTable

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 *)

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

Detailed Description

Definition at line 58 of file G4PenelopeRayleighModel.hh.

Constructor & Destructor Documentation

◆ G4PenelopeRayleighModel() [1/2]

G4PenelopeRayleighModel::G4PenelopeRayleighModel	(	const G4ParticleDefinition *	p = `0`,
		const G4String &	processName = `"PenRayleigh"`
	)

Definition at line 54 of file G4PenelopeRayleighModel.cc.

   :G4VEmModel(nam),fParticleChange(0),fParticle(0),isInitialised(false),
    logAtomicCrossSection(0),atomicFormFactor(0),logFormFactorTable(0),
    pMaxTable(0),samplingTable(0),fLocalTable(false)
 {
   fIntrinsicLowEnergyLimit = 100.0*eV;
   fIntrinsicHighEnergyLimit = 100.0*GeV;
   //  SetLowEnergyLimit(fIntrinsicLowEnergyLimit);
   SetHighEnergyLimit(fIntrinsicHighEnergyLimit);
 
   if (part)
     SetParticle(part);
 
   //
   verboseLevel= 0;
   // Verbosity scale:
   // 0 = nothing
   // 1 = warning for energy non-conservation
   // 2 = details of energy budget
   // 3 = calculation of cross sections, file openings, sampling of atoms
   // 4 = entering in methods
 
   //build the energy grid. It is the same for all materials
   G4double logenergy = std::log(fIntrinsicLowEnergyLimit/2.);
   G4double logmaxenergy = std::log(1.5*fIntrinsicHighEnergyLimit);
   //finer grid below 160 keV
   G4double logtransitionenergy = std::log(160*keV);
   G4double logfactor1 = std::log(10.)/250.;
   G4double logfactor2 = logfactor1*10;
   logEnergyGridPMax.push_back(logenergy);
   do{
     if (logenergy < logtransitionenergy)
       logenergy += logfactor1;
     else
       logenergy += logfactor2;
     logEnergyGridPMax.push_back(logenergy);
   }while (logenergy < logmaxenergy);
 }

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◆ ~G4PenelopeRayleighModel()

G4PenelopeRayleighModel::~G4PenelopeRayleighModel ( )

virtual

Definition at line 96 of file G4PenelopeRayleighModel.cc.

 {
   if (IsMaster() || fLocalTable)
     {
       std::map <G4int,G4PhysicsFreeVector*>::iterator i;
       if (logAtomicCrossSection)
     {
       for (i=logAtomicCrossSection->begin();i != logAtomicCrossSection->end();i++)
         if (i->second) delete i->second;
 
       delete logAtomicCrossSection;
       logAtomicCrossSection = 0;
     }
       if (atomicFormFactor)
     {
       for (i=atomicFormFactor->begin();i != atomicFormFactor->end();i++)
         if (i->second) delete i->second;
       delete atomicFormFactor;
       atomicFormFactor = 0;
     }
 
       ClearTables();
     }
 }

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◆ G4PenelopeRayleighModel() [2/2]

G4PenelopeRayleighModel::G4PenelopeRayleighModel ( const G4PenelopeRayleighModel & )

private

Member Function Documentation

◆ BuildFormFactorTable()

void G4PenelopeRayleighModel::BuildFormFactorTable ( const G4Material * material )

private

Definition at line 351 of file G4PenelopeRayleighModel.cc.

 {
 
    /*
      1) get composition and equivalent molecular density
    */
 
   G4int nElements = material->GetNumberOfElements();
   const G4ElementVector* elementVector = material->GetElementVector();
   const G4double* fractionVector = material->GetFractionVector();
 
   std::vector<G4double> *StechiometricFactors = new std::vector<G4double>;
   for (G4int i=0;i<nElements;i++)
     {
       G4double fraction = fractionVector[i];
       G4double atomicWeigth = (*elementVector)[i]->GetA()/(g/mole);
       StechiometricFactors->push_back(fraction/atomicWeigth);
     }
   //Find max
   G4double MaxStechiometricFactor = 0.;
   for (G4int i=0;i<nElements;i++)
     {
       if ((*StechiometricFactors)[i] > MaxStechiometricFactor)
         MaxStechiometricFactor = (*StechiometricFactors)[i];
     }
   if (MaxStechiometricFactor<1e-16)
     {
       G4ExceptionDescription ed;
       ed << "Inconsistent data of atomic composition for " <<
     material->GetName() << G4endl;
       G4Exception("G4PenelopeRayleighModel::BuildFormFactorTable()",
           "em2042",FatalException,ed);
     }
   //Normalize
   for (G4int i=0;i<nElements;i++)
     (*StechiometricFactors)[i] /=  MaxStechiometricFactor;
 
   // Equivalent atoms per molecule
   G4double atomsPerMolecule = 0;
   for (G4int i=0;i<nElements;i++)
     atomsPerMolecule += (*StechiometricFactors)[i];
 
   /*
     CREATE THE FORM FACTOR TABLE
   */
   G4PhysicsFreeVector* theFFVec = new G4PhysicsFreeVector(logQSquareGrid.size());
   theFFVec->SetSpline(true);
 
   for (size_t k=0;k<logQSquareGrid.size();k++)
     {
       G4double ff2 = 0; //squared form factor
       for (G4int i=0;i<nElements;i++)
     {
       G4int iZ = (G4int) (*elementVector)[i]->GetZ();
       G4PhysicsFreeVector* theAtomVec = atomicFormFactor->find(iZ)->second;
       G4double f = (*theAtomVec)[k]; //the q-grid is always the same
       ff2 += f*f*(*StechiometricFactors)[i];
     }
       if (ff2)
     theFFVec->PutValue(k,logQSquareGrid[k],std::log(ff2)); //NOTICE: THIS IS log(Q^2) vs. log(F^2)
     }
   logFormFactorTable->insert(std::make_pair(material,theFFVec));
 
   delete StechiometricFactors;
 
   return;
 }

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◆ ClearTables()

void G4PenelopeRayleighModel::ClearTables ( )

private

Definition at line 122 of file G4PenelopeRayleighModel.cc.

 {
   /*
   if (!IsMaster())
     //Should not be here!
     G4Exception("G4PenelopeRayleighModel::ClearTables()",
         "em0100",FatalException,"Worker thread in this method");
   */
 
   std::map <const G4Material*,G4PhysicsFreeVector*>::iterator i;
 
    if (logFormFactorTable)
      {
        for (i=logFormFactorTable->begin(); i != logFormFactorTable->end(); i++)
      if (i->second) delete i->second;
        delete logFormFactorTable;
        logFormFactorTable = 0; //zero explicitely
      }
 
    if (pMaxTable)
      {
        for (i=pMaxTable->begin(); i != pMaxTable->end(); i++)
      if (i->second) delete i->second;
        delete pMaxTable;
        pMaxTable = 0; //zero explicitely
      }
 
    std::map<const G4Material*,G4PenelopeSamplingData*>::iterator ii;
    if (samplingTable)
      {
        for (ii=samplingTable->begin(); ii != samplingTable->end(); ii++)
      if (ii->second) delete ii->second;
        delete samplingTable;
        samplingTable = 0; //zero explicitely
      }
 
    return;
 }

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◆ ComputeCrossSectionPerAtom()

G4double G4PenelopeRayleighModel::ComputeCrossSectionPerAtom	(	const G4ParticleDefinition *	,
		G4double	kinEnergy,
		G4double	Z,
		G4double	A = `0`,
		G4double	cut = `0`,
		G4double	emax = `DBL_MAX`
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 280 of file G4PenelopeRayleighModel.cc.

 {
   // Cross section of Rayleigh scattering in Penelope v2008 is calculated by the EPDL97
   // tabulation, Cuellen et al. (1997), with non-relativistic form factors from Hubbel
   // et al. J. Phys. Chem. Ref. Data 4 (1975) 471; Erratum ibid. 6 (1977) 615.
 
    if (verboseLevel > 3)
     G4cout << "Calling CrossSectionPerAtom() of G4PenelopeRayleighModel" << G4endl;
 
    G4int iZ = (G4int) Z;
 
    //Either Initialize() was not called, or we are in a slave and InitializeLocal() was
    //not invoked
    if (!logAtomicCrossSection)
      {
        //create a **thread-local** version of the table. Used only for G4EmCalculator and
        //Unit Tests
        fLocalTable = true;
        logAtomicCrossSection = new std::map<G4int,G4PhysicsFreeVector*>;
      }
    //now it should be ok
    if (!logAtomicCrossSection->count(iZ))
      {
        //If we are here, it means that Initialize() was inkoved, but the MaterialTable was
        //not filled up. This can happen in a UnitTest or via G4EmCalculator
        if (verboseLevel > 0)
     {
       //Issue a G4Exception (warning) only in verbose mode
       G4ExceptionDescription ed;
       ed << "Unable to retrieve the cross section table for Z=" << iZ << G4endl;
       ed << "This can happen only in Unit Tests or via G4EmCalculator" << G4endl;
       G4Exception("G4PenelopeRayleighModel::ComputeCrossSectionPerAtom()",
               "em2040",JustWarning,ed);
     }
        //protect file reading via autolock
        G4AutoLock lock(&PenelopeRayleighModelMutex);
        ReadDataFile(iZ);
        lock.unlock();
      }
 
    G4double cross = 0;
 
    G4PhysicsFreeVector* atom = logAtomicCrossSection->find(iZ)->second;
    if (!atom)
      {
        G4ExceptionDescription ed;
        ed << "Unable to find Z=" << iZ << " in the atomic cross section table" << G4endl;
        G4Exception("G4PenelopeRayleighModel::ComputeCrossSectionPerAtom()",
            "em2041",FatalException,ed);
        return 0;
      }
    G4double logene = std::log(energy);
    G4double logXS = atom->Value(logene);
    cross = G4Exp(logXS);
 
    if (verboseLevel > 2)
      {
        G4cout << "Rayleigh cross section at " << energy/keV << " keV for Z=" << Z <<
      " = " << cross/barn << " barn" << G4endl;
      }
 
    return cross;
 }

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◆ DumpFormFactorTable()

void G4PenelopeRayleighModel::DumpFormFactorTable ( const G4Material * mat )

Definition at line 1339 of file G4PenelopeRayleighModel.cc.

 {
   G4cout << "*****************************************************************" << G4endl;
   G4cout << "G4PenelopeRayleighModel: Form Factor Table for " << mat->GetName() << G4endl;
   //try to use the same format as Penelope-Fortran, namely Q (/m_e*c) and F
   G4cout <<  "Q/(m_e*c)                 F(Q)     " << G4endl;
   G4cout << "*****************************************************************" << G4endl;
   if (!logFormFactorTable->count(mat))
     BuildFormFactorTable(mat);
 
   G4PhysicsFreeVector* theVec = logFormFactorTable->find(mat)->second;
   for (size_t i=0;i<theVec->GetVectorLength();i++)
     {
       G4double logQ2 = theVec->GetLowEdgeEnergy(i);
       G4double Q = G4Exp(0.5*logQ2);
       G4double logF2 = (*theVec)[i];
       G4double F = G4Exp(0.5*logF2);
       G4cout << Q << "              " << F << G4endl;
     }
   //DONE
   return;
 }

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◆ GetFSquared()

G4double G4PenelopeRayleighModel::GetFSquared	(	const G4Material *	mat,
		const G4double	QSquared
	)

private

Definition at line 730 of file G4PenelopeRayleighModel.cc.

 {
   G4double f2 = 0;
   //Input value QSquared could be zero: protect the log() below against
   //the FPE exception
   //If Q<1e-10, set Q to 1e-10
   G4double logQSquared = (QSquared>1e-10) ? std::log(QSquared) : -23.;
   //last value of the table
   G4double maxlogQ2 = logQSquareGrid[logQSquareGrid.size()-1];
 
 
   //now it should  be all right
   G4PhysicsFreeVector* theVec = logFormFactorTable->find(mat)->second;
 
   if (!theVec)
     {
       G4ExceptionDescription ed;
       ed << "Unable to retrieve F squared table for " << mat->GetName() << G4endl;
       G4Exception("G4PenelopeRayleighModel::GetFSquared()",
           "em2046",FatalException,ed);
       return 0;
     }
   if (logQSquared < -20) // Q < 1e-9
     {
       G4double logf2 = (*theVec)[0]; //first value of the table
       f2 = G4Exp(logf2);
     }
   else if (logQSquared > maxlogQ2)
     f2 =0;
   else
     {
       //log(Q^2) vs. log(F^2)
       G4double logf2 = theVec->Value(logQSquared);
       f2 = G4Exp(logf2);
 
     }
   if (verboseLevel > 3)
     {
       G4cout << "G4PenelopeRayleighModel::GetFSquared() in " << mat->GetName() << G4endl;
       G4cout << "Q^2 = " <<  QSquared << " (units of 1/(m_e*c); F^2 = " << f2 << G4endl;
     }
   return f2;
 }

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◆ GetPMaxTable()

void G4PenelopeRayleighModel::GetPMaxTable ( const G4Material * mat )

private

Definition at line 1204 of file G4PenelopeRayleighModel.cc.

 {
 
   if (!pMaxTable)
     {
       G4cout << "G4PenelopeRayleighModel::BuildPMaxTable" << G4endl;
       G4cout << "Going to instanziate the pMaxTable !" << G4endl;
       G4cout << "That should _not_ be here! " << G4endl;
       pMaxTable = new std::map<const G4Material*,G4PhysicsFreeVector*>;
     }
   //check if the table is already there
   if (pMaxTable->count(mat))
     return;
 
   //otherwise build it
   if (!samplingTable)
     {
       G4Exception("G4PenelopeRayleighModel::GetPMaxTable()",
           "em2052",FatalException,
           "SamplingTable is not properly instantiated");
       return;
     }
 
   //This should not be: the sampling table is built before the p-table
   if (!samplingTable->count(mat))
     {
        G4ExceptionDescription ed;
        ed << "Sampling table for material " << mat->GetName() << " not found";
        G4Exception("G4PenelopeRayleighModel::GetPMaxTable()",
                   "em2052",FatalException,
                   ed);
        return;
     }
 
   G4PenelopeSamplingData *theTable = samplingTable->find(mat)->second;
   size_t tablePoints = theTable->GetNumberOfStoredPoints();
 
   size_t nOfEnergyPoints = logEnergyGridPMax.size();
   G4PhysicsFreeVector* theVec = new G4PhysicsFreeVector(nOfEnergyPoints);
 
   const size_t nip = 51; //hard-coded in Penelope
 
   for (size_t ie=0;ie<logEnergyGridPMax.size();ie++)
     {
       G4double energy = G4Exp(logEnergyGridPMax[ie]);
       G4double Qm = 2.0*energy/electron_mass_c2; //this is non-dimensional now
       G4double Qm2 = Qm*Qm;
       G4double firstQ2 = theTable->GetX(0);
       G4double lastQ2 = theTable->GetX(tablePoints-1);
       G4double thePMax = 0;
 
       if (Qm2 > firstQ2)
     {
       if (Qm2 < lastQ2)
         {
           //bisection to look for the index of Qm
           size_t lowerBound = 0;
           size_t upperBound = tablePoints-1;
           while (lowerBound <= upperBound)
         {
           size_t midBin = (lowerBound + upperBound)/2;
           if( Qm2 < theTable->GetX(midBin))
             { upperBound = midBin-1; }
           else
             { lowerBound = midBin+1; }
         }
           //upperBound is the output (but also lowerBounf --> should be the same!)
           G4double Q1 = theTable->GetX(upperBound);
           G4double Q2 = Qm2;
           G4double DQ = (Q2-Q1)/((G4double)(nip-1));
           G4double theA = theTable->GetA(upperBound);
           G4double theB = theTable->GetB(upperBound);
           G4double thePAC = theTable->GetPAC(upperBound);
           G4DataVector* fun = new G4DataVector();
           for (size_t k=0;k<nip;k++)
         {
           G4double qi = Q1 + k*DQ;
           G4double tau = (qi-Q1)/
             (theTable->GetX(upperBound+1)-Q1);
           G4double con1 = 2.0*theB*tau;
           G4double ci = 1.0+theA+theB;
           G4double con2 = ci-theA*tau;
           G4double etap = 0;
           if (std::fabs(con1) > 1.0e-16*std::fabs(con2))
             etap = con2*(1.0-std::sqrt(1.0-2.0*tau*con1/(con2*con2)))/con1;
           else
             etap = tau/con2;
           G4double theFun = (theTable->GetPAC(upperBound+1)-thePAC)*
             (1.0+(theA+theB*etap)*etap)*(1.0+(theA+theB*etap)*etap)/
             ((1.0-theB*etap*etap)*ci*(theTable->GetX(upperBound+1)-Q1));
           fun->push_back(theFun);
         }
           //Now intergrate numerically the fun Cavalieri-Simpson's method
           G4DataVector* sum = new G4DataVector;
           G4double CONS = DQ*(1./12.);
           G4double HCONS = 0.5*CONS;
           sum->push_back(0.);
           G4double secondPoint = (*sum)[0] +
         (5.0*(*fun)[0]+8.0*(*fun)[1]-(*fun)[2])*CONS;
           sum->push_back(secondPoint);
           for (size_t hh=2;hh<nip-1;hh++)
         {
           G4double previous = (*sum)[hh-1];
           G4double next = previous+(13.0*((*fun)[hh-1]+(*fun)[hh])-
                         (*fun)[hh+1]-(*fun)[hh-2])*HCONS;
           sum->push_back(next);
         }
           G4double last = (*sum)[nip-2]+(5.0*(*fun)[nip-1]+8.0*(*fun)[nip-2]-
                          (*fun)[nip-3])*CONS;
           sum->push_back(last);
           thePMax = thePAC + (*sum)[sum->size()-1]; //last point
           delete fun;
           delete sum;
         }
       else
         {
           thePMax = 1.0;
         }
     }
       else
     {
       thePMax = theTable->GetPAC(0);
     }
 
       //Write number in the table
       theVec->PutValue(ie,energy,thePMax);
   }
 
   pMaxTable->insert(std::make_pair(mat,theVec));
   return;
 
 }

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◆ GetVerbosityLevel()

G4int G4PenelopeRayleighModel::GetVerbosityLevel ( )

inline

Definition at line 85 of file G4PenelopeRayleighModel.hh.

85 {return verboseLevel;};

G4PenelopeRayleighModel::verboseLevel

G4int verboseLevel

Definition: G4PenelopeRayleighModel.hh:105

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◆ Initialise()

void G4PenelopeRayleighModel::Initialise	(	const G4ParticleDefinition *	part,
		const G4DataVector &
	)

virtual

Implements G4VEmModel.

Definition at line 163 of file G4PenelopeRayleighModel.cc.

 {
   if (verboseLevel > 3)
     G4cout << "Calling G4PenelopeRayleighModel::Initialise()" << G4endl;
 
   SetParticle(part);
 
   //Only the master model creates/fills/destroys the tables
   if (IsMaster() && part == fParticle)
     {
       //clear tables depending on materials, not the atomic ones
       ClearTables();
 
       if (verboseLevel > 3)
     G4cout << "Calling G4PenelopeRayleighModel::Initialise() [master]" << G4endl;
 
       //create new tables
       //
       // logAtomicCrossSection and atomicFormFactor are created only once,
       // since they are never cleared
       if (!logAtomicCrossSection)
     logAtomicCrossSection = new std::map<G4int,G4PhysicsFreeVector*>;
       if (!atomicFormFactor)
     atomicFormFactor = new std::map<G4int,G4PhysicsFreeVector*>;
 
       if (!logFormFactorTable)
     logFormFactorTable = new std::map<const G4Material*,G4PhysicsFreeVector*>;
       if (!pMaxTable)
     pMaxTable = new std::map<const G4Material*,G4PhysicsFreeVector*>;
       if (!samplingTable)
     samplingTable = new std::map<const G4Material*,G4PenelopeSamplingData*>;
 
 
       G4ProductionCutsTable* theCoupleTable =
     G4ProductionCutsTable::GetProductionCutsTable();
 
       for (size_t i=0;i<theCoupleTable->GetTableSize();i++)
     {
       const G4Material* material =
         theCoupleTable->GetMaterialCutsCouple(i)->GetMaterial();
       const G4ElementVector* theElementVector = material->GetElementVector();
 
       for (size_t j=0;j<material->GetNumberOfElements();j++)
         {
           G4int iZ = (G4int) theElementVector->at(j)->GetZ();
           //read data files only in the master
           if (!logAtomicCrossSection->count(iZ))
         ReadDataFile(iZ);
         }
 
       //1) If the table has not been built for the material, do it!
       if (!logFormFactorTable->count(material))
         BuildFormFactorTable(material);
 
       //2) retrieve or build the sampling table
       if (!(samplingTable->count(material)))
         InitializeSamplingAlgorithm(material);
 
       //3) retrieve or build the pMax data
       if (!pMaxTable->count(material))
         GetPMaxTable(material);
 
     }
 
       if (verboseLevel > 1) {
     G4cout << "Penelope Rayleigh model v2008 is initialized " << G4endl
            << "Energy range: "
            << LowEnergyLimit() / keV << " keV - "
            << HighEnergyLimit() / GeV << " GeV"
            << G4endl;
       }
     }
 
   if(isInitialised) return;
   fParticleChange = GetParticleChangeForGamma();
   isInitialised = true;
 }

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◆ InitialiseLocal()

void G4PenelopeRayleighModel::InitialiseLocal	(	const G4ParticleDefinition *	part,
		G4VEmModel *	masterModel
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 244 of file G4PenelopeRayleighModel.cc.

 {
   if (verboseLevel > 3)
     G4cout << "Calling  G4PenelopeRayleighModel::InitialiseLocal()" << G4endl;
 
   //
   //Check that particle matches: one might have multiple master models (e.g.
   //for e+ and e-).
   //
   if (part == fParticle)
     {
       //Get the const table pointers from the master to the workers
       const G4PenelopeRayleighModel* theModel =
     static_cast<G4PenelopeRayleighModel*> (masterModel);
 
       //Copy pointers to the data tables
       logAtomicCrossSection = theModel->logAtomicCrossSection;
       atomicFormFactor = theModel->atomicFormFactor;
       logFormFactorTable = theModel->logFormFactorTable;
       pMaxTable = theModel->pMaxTable;
       samplingTable = theModel->samplingTable;
 
       //copy the G4DataVector with the grid
       logQSquareGrid = theModel->logQSquareGrid;
 
       //Same verbosity for all workers, as the master
       verboseLevel = theModel->verboseLevel;
     }
 
   return;
 }

◆ InitializeSamplingAlgorithm()

void G4PenelopeRayleighModel::InitializeSamplingAlgorithm ( const G4Material * mat )

private

Definition at line 776 of file G4PenelopeRayleighModel.cc.

 {
 
   G4double q2min = 0;
   G4double q2max = 0;
   const size_t np = 150; //hard-coded in Penelope
   //G4cout << "Init N= " << logQSquareGrid.size() << G4endl;
   for (size_t i=1;i<logQSquareGrid.size();i++)
     {
       G4double Q2 = G4Exp(logQSquareGrid[i]);
       if (GetFSquared(mat,Q2) >  1e-35)
     {
       q2max = G4Exp(logQSquareGrid[i-1]);
     }
       //G4cout << "Q2= " << Q2 << " q2max= " << q2max << G4endl;
     }
 
   size_t nReducedPoints = np/4;
 
   //check for errors
   if (np < 16)
     {
       G4Exception("G4PenelopeRayleighModel::InitializeSamplingAlgorithm()",
           "em2047",FatalException,
           "Too few points to initialize the sampling algorithm");
     }
   if (q2min > (q2max-1e-10))
     {
       G4cout << "q2min= " << q2min << " q2max= " << q2max << G4endl;
       G4Exception("G4PenelopeRayleighModel::InitializeSamplingAlgorithm()",
           "em2048",FatalException,
           "Too narrow grid to initialize the sampling algorithm");
     }
 
   //This is subroutine RITAI0 of Penelope
   //Create an object of type G4PenelopeRayleighSamplingData --> store in a map::Material*
 
   //temporary vectors --> Then everything is stored in G4PenelopeSamplingData
   G4DataVector* x = new G4DataVector();
 
   /*******************************************************************************
     Start with a grid of NUNIF points uniformly spaced in the interval q2min,q2max
   ********************************************************************************/
   size_t NUNIF = std::min(std::max(((size_t)8),nReducedPoints),np/2);
   const G4int nip = 51; //hard-coded in Penelope
 
   G4double dx = (q2max-q2min)/((G4double) NUNIF-1);
   x->push_back(q2min);
   for (size_t i=1;i<NUNIF-1;i++)
     {
       G4double app = q2min + i*dx;
       x->push_back(app); //increase
     }
   x->push_back(q2max);
 
   if (verboseLevel> 3)
     G4cout << "Vector x has " << x->size() << " points, while NUNIF = " << NUNIF << G4endl;
 
   //Allocate temporary storage vectors
   G4DataVector* area = new G4DataVector();
   G4DataVector* a = new G4DataVector();
   G4DataVector* b = new G4DataVector();
   G4DataVector* c = new G4DataVector();
   G4DataVector* err = new G4DataVector();
 
   for (size_t i=0;i<NUNIF-1;i++) //build all points but the last
     {
       //Temporary vectors for this loop
       G4DataVector* pdfi = new G4DataVector();
       G4DataVector* pdfih = new G4DataVector();
       G4DataVector* sumi = new G4DataVector();
 
       G4double dxi = ((*x)[i+1]-(*x)[i])/(G4double (nip-1));
       G4double pdfmax = 0;
       for (G4int k=0;k<nip;k++)
     {
       G4double xik = (*x)[i]+k*dxi;
       G4double pdfk = std::max(GetFSquared(mat,xik),0.);
       pdfi->push_back(pdfk);
       pdfmax = std::max(pdfmax,pdfk);
       if (k < (nip-1))
         {
           G4double xih = xik + 0.5*dxi;
           G4double pdfIK = std::max(GetFSquared(mat,xih),0.);
           pdfih->push_back(pdfIK);
           pdfmax = std::max(pdfmax,pdfIK);
         }
     }
 
       //Simpson's integration
       G4double cons = dxi*0.5*(1./3.);
       sumi->push_back(0.);
       for (G4int k=1;k<nip;k++)
     {
       G4double previous = (*sumi)[k-1];
       G4double next = previous + cons*((*pdfi)[k-1]+4.0*(*pdfih)[k-1]+(*pdfi)[k]);
       sumi->push_back(next);
     }
 
       G4double lastIntegral = (*sumi)[sumi->size()-1];
       area->push_back(lastIntegral);
       //Normalize cumulative function
       G4double factor = 1.0/lastIntegral;
       for (size_t k=0;k<sumi->size();k++)
     (*sumi)[k] *= factor;
 
       //When the PDF vanishes at one of the interval end points, its value is modified
       if ((*pdfi)[0] < 1e-35)
     (*pdfi)[0] = 1e-5*pdfmax;
       if ((*pdfi)[pdfi->size()-1] < 1e-35)
     (*pdfi)[pdfi->size()-1] = 1e-5*pdfmax;
 
       G4double pli = (*pdfi)[0]*factor;
       G4double pui = (*pdfi)[pdfi->size()-1]*factor;
       G4double B_temp = 1.0-1.0/(pli*pui*dx*dx);
       G4double A_temp = (1.0/(pli*dx))-1.0-B_temp;
       G4double C_temp = 1.0+A_temp+B_temp;
       if (C_temp < 1e-35)
     {
       a->push_back(0.);
       b->push_back(0.);
       c->push_back(1.);
     }
       else
     {
       a->push_back(A_temp);
       b->push_back(B_temp);
       c->push_back(C_temp);
     }
 
       //OK, now get ERR(I), the integral of the absolute difference between the rational interpolation
       //and the true pdf, extended over the interval (X(I),X(I+1))
       G4int icase = 1; //loop code
       G4bool reLoop = false;
       err->push_back(0.);
       do
     {
       reLoop = false;
       (*err)[i] = 0.; //zero variable
       for (G4int k=0;k<nip;k++)
         {
           G4double rr = (*sumi)[k];
           G4double pap = (*area)[i]*(1.0+((*a)[i]+(*b)[i]*rr)*rr)*(1.0+((*a)[i]+(*b)[i]*rr)*rr)/
         ((1.0-(*b)[i]*rr*rr)*(*c)[i]*((*x)[i+1]-(*x)[i]));
           if (k == 0 || k == nip-1)
         (*err)[i] += 0.5*std::fabs(pap-(*pdfi)[k]);
           else
         (*err)[i] += std::fabs(pap-(*pdfi)[k]);
         }
       (*err)[i] *= dxi;
 
       //If err(I) is too large, the pdf is approximated by a uniform distribution
       if ((*err)[i] > 0.1*(*area)[i] && icase == 1)
         {
           (*b)[i] = 0;
           (*a)[i] = 0;
           (*c)[i] = 1.;
           icase = 2;
           reLoop = true;
         }
     }while(reLoop);
 
       delete pdfi;
       delete pdfih;
       delete sumi;
     } //end of first loop over i
 
   //Now assign last point
   (*x)[x->size()-1] = q2max;
   a->push_back(0.);
   b->push_back(0.);
   c->push_back(0.);
   err->push_back(0.);
   area->push_back(0.);
 
   if (x->size() != NUNIF || a->size() != NUNIF ||
       err->size() != NUNIF || area->size() != NUNIF)
     {
       G4ExceptionDescription ed;
       ed << "Problem in building the Table for Sampling: array dimensions do not match" << G4endl;
       G4Exception("G4PenelopeRayleighModel::InitializeSamplingAlgorithm()",
           "em2049",FatalException,ed);
     }
 
   /*******************************************************************************
    New grid points are added by halving the sub-intervals with the largest absolute error
   This is done up to np=150 points in the grid
   ********************************************************************************/
   do
     {
       G4double maxError = 0.0;
       size_t iErrMax = 0;
       for (size_t i=0;i<err->size()-2;i++)
     {
       //maxError is the lagest of the interval errors err[i]
       if ((*err)[i] > maxError)
         {
           maxError = (*err)[i];
           iErrMax = i;
         }
     }
 
       //OK, now I have to insert one new point in the position iErrMax
       G4double newx = 0.5*((*x)[iErrMax]+(*x)[iErrMax+1]);
 
       x->insert(x->begin()+iErrMax+1,newx);
       //Add place-holders in the other vectors
       area->insert(area->begin()+iErrMax+1,0.);
       a->insert(a->begin()+iErrMax+1,0.);
       b->insert(b->begin()+iErrMax+1,0.);
       c->insert(c->begin()+iErrMax+1,0.);
       err->insert(err->begin()+iErrMax+1,0.);
 
       //Now calculate the other parameters
       for (size_t i=iErrMax;i<=iErrMax+1;i++)
     {
       //Temporary vectors for this loop
       G4DataVector* pdfi = new G4DataVector();
       G4DataVector* pdfih = new G4DataVector();
       G4DataVector* sumi = new G4DataVector();
 
       G4double dxLocal = (*x)[i+1]-(*x)[i];
       G4double dxi = ((*x)[i+1]-(*x)[i])/(G4double (nip-1));
       G4double pdfmax = 0;
       for (G4int k=0;k<nip;k++)
         {
           G4double xik = (*x)[i]+k*dxi;
           G4double pdfk = std::max(GetFSquared(mat,xik),0.);
           pdfi->push_back(pdfk);
           pdfmax = std::max(pdfmax,pdfk);
           if (k < (nip-1))
         {
           G4double xih = xik + 0.5*dxi;
           G4double pdfIK = std::max(GetFSquared(mat,xih),0.);
           pdfih->push_back(pdfIK);
           pdfmax = std::max(pdfmax,pdfIK);
         }
         }
 
       //Simpson's integration
       G4double cons = dxi*0.5*(1./3.);
       sumi->push_back(0.);
       for (G4int k=1;k<nip;k++)
         {
           G4double previous = (*sumi)[k-1];
           G4double next = previous + cons*((*pdfi)[k-1]+4.0*(*pdfih)[k-1]+(*pdfi)[k]);
           sumi->push_back(next);
         }
       G4double lastIntegral = (*sumi)[sumi->size()-1];
       (*area)[i] = lastIntegral;
 
       //Normalize cumulative function
       G4double factor = 1.0/lastIntegral;
       for (size_t k=0;k<sumi->size();k++)
         (*sumi)[k] *= factor;
 
       //When the PDF vanishes at one of the interval end points, its value is modified
       if ((*pdfi)[0] < 1e-35)
         (*pdfi)[0] = 1e-5*pdfmax;
       if ((*pdfi)[pdfi->size()-1] < 1e-35)
         (*pdfi)[pdfi->size()-1] = 1e-5*pdfmax;
 
       G4double pli = (*pdfi)[0]*factor;
       G4double pui = (*pdfi)[pdfi->size()-1]*factor;
       G4double B_temp = 1.0-1.0/(pli*pui*dxLocal*dxLocal);
       G4double A_temp = (1.0/(pli*dxLocal))-1.0-B_temp;
       G4double C_temp = 1.0+A_temp+B_temp;
       if (C_temp < 1e-35)
         {
           (*a)[i]= 0.;
           (*b)[i] = 0.;
           (*c)[i] = 1;
         }
       else
         {
           (*a)[i]= A_temp;
           (*b)[i] = B_temp;
           (*c)[i] = C_temp;
         }
       //OK, now get ERR(I), the integral of the absolute difference between the rational interpolation
       //and the true pdf, extended over the interval (X(I),X(I+1))
       G4int icase = 1; //loop code
       G4bool reLoop = false;
       do
         {
           reLoop = false;
           (*err)[i] = 0.; //zero variable
           for (G4int k=0;k<nip;k++)
         {
           G4double rr = (*sumi)[k];
           G4double pap = (*area)[i]*(1.0+((*a)[i]+(*b)[i]*rr)*rr)*(1.0+((*a)[i]+(*b)[i]*rr)*rr)/
             ((1.0-(*b)[i]*rr*rr)*(*c)[i]*((*x)[i+1]-(*x)[i]));
           if (k == 0 || k == nip-1)
             (*err)[i] += 0.5*std::fabs(pap-(*pdfi)[k]);
           else
             (*err)[i] += std::fabs(pap-(*pdfi)[k]);
         }
           (*err)[i] *= dxi;
 
           //If err(I) is too large, the pdf is approximated by a uniform distribution
           if ((*err)[i] > 0.1*(*area)[i] && icase == 1)
         {
           (*b)[i] = 0;
           (*a)[i] = 0;
           (*c)[i] = 1.;
           icase = 2;
           reLoop = true;
         }
         }while(reLoop);
       delete pdfi;
       delete pdfih;
       delete sumi;
     }
     }while(x->size() < np);
 
   if (x->size() != np || a->size() != np ||
       err->size() != np || area->size() != np)
     {
       G4Exception("G4PenelopeRayleighModel::InitializeSamplingAlgorithm()",
           "em2050",FatalException,
           "Problem in building the extended Table for Sampling: array dimensions do not match ");
     }
 
   /*******************************************************************************
    Renormalization
   ********************************************************************************/
   G4double ws = 0;
   for (size_t i=0;i<np-1;i++)
     ws += (*area)[i];
   ws = 1.0/ws;
   G4double errMax = 0;
   for (size_t i=0;i<np-1;i++)
     {
       (*area)[i] *= ws;
       (*err)[i] *= ws;
       errMax = std::max(errMax,(*err)[i]);
     }
 
   //Vector with the normalized cumulative distribution
   G4DataVector* PAC = new G4DataVector();
   PAC->push_back(0.);
   for (size_t i=0;i<np-1;i++)
     {
       G4double previous = (*PAC)[i];
       PAC->push_back(previous+(*area)[i]);
     }
   (*PAC)[PAC->size()-1] = 1.;
 
   /*******************************************************************************
   Pre-calculated limits for the initial binary search for subsequent sampling
   ********************************************************************************/
 
   //G4DataVector* ITTL = new G4DataVector();
   std::vector<size_t> *ITTL = new std::vector<size_t>;
   std::vector<size_t> *ITTU = new std::vector<size_t>;
 
   //Just create place-holders
   for (size_t i=0;i<np;i++)
     {
       ITTL->push_back(0);
       ITTU->push_back(0);
     }
 
   G4double bin = 1.0/(np-1);
   (*ITTL)[0]=0;
   for (size_t i=1;i<(np-1);i++)
     {
       G4double ptst = i*bin;
       G4bool found = false;
       for (size_t j=(*ITTL)[i-1];j<np && !found;j++)
     {
       if ((*PAC)[j] > ptst)
         {
           (*ITTL)[i] = j-1;
           (*ITTU)[i-1] = j;
           found = true;
         }
     }
     }
   (*ITTU)[ITTU->size()-2] = ITTU->size()-1;
   (*ITTU)[ITTU->size()-1] = ITTU->size()-1;
   (*ITTL)[ITTL->size()-1] = ITTU->size()-2;
 
   if (ITTU->size() != np || ITTU->size() != np)
     {
       G4Exception("G4PenelopeRayleighModel::InitializeSamplingAlgorithm()",
           "em2051",FatalException,
           "Problem in building the Limit Tables for Sampling: array dimensions do not match");
     }
 
 
   /********************************************************************************
     Copy tables
   ********************************************************************************/
   G4PenelopeSamplingData* theTable = new G4PenelopeSamplingData(np);
   for (size_t i=0;i<np;i++)
     {
       theTable->AddPoint((*x)[i],(*PAC)[i],(*a)[i],(*b)[i],(*ITTL)[i],(*ITTU)[i]);
     }
 
   if (verboseLevel > 2)
     {
       G4cout << "*************************************************************************" <<
     G4endl;
       G4cout << "Sampling table for Penelope Rayleigh scattering in " << mat->GetName() << G4endl;
       theTable->DumpTable();
     }
   samplingTable->insert(std::make_pair(mat,theTable));
 
 
   //Clean up temporary vectors
   delete x;
   delete a;
   delete b;
   delete c;
   delete err;
   delete area;
   delete PAC;
   delete ITTL;
   delete ITTU;
 
   //DONE!
   return;
 
 }

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◆ operator=()

G4PenelopeRayleighModel& G4PenelopeRayleighModel::operator= ( const G4PenelopeRayleighModel & right )

private

◆ ReadDataFile()

void G4PenelopeRayleighModel::ReadDataFile ( G4int Z )

private

Definition at line 593 of file G4PenelopeRayleighModel.cc.

 {
 
   if (verboseLevel > 2)
     {
       G4cout << "G4PenelopeRayleighModel::ReadDataFile()" << G4endl;
       G4cout << "Going to read Rayleigh data files for Z=" << Z << G4endl;
     }
 
   char* path = getenv("G4LEDATA");
   if (!path)
     {
       G4String excep = "G4LEDATA environment variable not set!";
       G4Exception("G4PenelopeRayleighModel::ReadDataFile()",
           "em0006",FatalException,excep);
       return;
     }
 
   /*
     Read first the cross section file
   */
   std::ostringstream ost;
   if (Z>9)
     ost << path << "/penelope/rayleigh/pdgra" << Z << ".p08";
   else
     ost << path << "/penelope/rayleigh/pdgra0" << Z << ".p08";
   std::ifstream file(ost.str().c_str());
   if (!file.is_open())
     {
       G4String excep = "Data file " + G4String(ost.str()) + " not found!";
       G4Exception("G4PenelopeRayleighModel::ReadDataFile()",
           "em0003",FatalException,excep);
     }
   G4int readZ =0;
   size_t nPoints= 0;
   file >> readZ >> nPoints;
   //check the right file is opened.
   if (readZ != Z || nPoints <= 0 || nPoints >= 5000)
     {
       G4ExceptionDescription ed;
       ed << "Corrupted data file for Z=" << Z << G4endl;
       G4Exception("G4PenelopeRayleighModel::ReadDataFile()",
           "em0005",FatalException,ed);
       return;
     }
   G4PhysicsFreeVector* theVec = new G4PhysicsFreeVector((size_t)nPoints);
   G4double ene=0,f1=0,f2=0,xs=0;
   for (size_t i=0;i<nPoints;i++)
     {
       file >> ene >> f1 >> f2 >> xs;
       //dimensional quantities
       ene *= eV;
       xs *= cm2;
       theVec->PutValue(i,std::log(ene),std::log(xs));
       if (file.eof() && i != (nPoints-1)) //file ended too early
     {
       G4ExceptionDescription ed ;
       ed << "Corrupted data file for Z=" << Z << G4endl;
       ed << "Found less than " << nPoints << "entries " <<G4endl;
       G4Exception("G4PenelopeRayleighModel::ReadDataFile()",
               "em0005",FatalException,ed);
     }
     }
   if (!logAtomicCrossSection)
     {
       G4Exception("G4PenelopeRayleighModel::ReadDataFile()",
           "em2044",FatalException,"Unable to allocate the atomic cross section table");
       delete theVec;
       return;
     }
   logAtomicCrossSection->insert(std::make_pair(Z,theVec));
   file.close();
 
   /*
     Then read the form factor file
   */
   std::ostringstream ost2;
   if (Z>9)
     ost2 << path << "/penelope/rayleigh/pdaff" << Z << ".p08";
   else
     ost2 << path << "/penelope/rayleigh/pdaff0" << Z << ".p08";
   file.open(ost2.str().c_str());
   if (!file.is_open())
     {
       G4String excep = "Data file " + G4String(ost2.str()) + " not found!";
       G4Exception("G4PenelopeRayleighModel::ReadDataFile()",
           "em0003",FatalException,excep);
     }
   file >> readZ >> nPoints;
   //check the right file is opened.
   if (readZ != Z || nPoints <= 0 || nPoints >= 5000)
     {
       G4ExceptionDescription ed;
       ed << "Corrupted data file for Z=" << Z << G4endl;
       G4Exception("G4PenelopeRayleighModel::ReadDataFile()",
           "em0005",FatalException,ed);
       return;
     }
   G4PhysicsFreeVector* theFFVec = new G4PhysicsFreeVector((size_t)nPoints);
   G4double q=0,ff=0,incoh=0;
   G4bool fillQGrid = false;
   //fill this vector only the first time.
   if (!logQSquareGrid.size())
     fillQGrid = true;
   for (size_t i=0;i<nPoints;i++)
     {
       file >> q >> ff >> incoh;
       //q and ff are dimensionless (q is in units of (m_e*c)
       theFFVec->PutValue(i,q,ff);
       if (fillQGrid)
     {
       logQSquareGrid.push_back(2.0*std::log(q));
     }
       if (file.eof() && i != (nPoints-1)) //file ended too early
     {
       G4ExceptionDescription ed;
       ed << "Corrupted data file for Z=" << Z << G4endl;
       ed << "Found less than " << nPoints << "entries " <<G4endl;
       G4Exception("G4PenelopeRayleighModel::ReadDataFile()",
               "em0005",FatalException,ed);
     }
     }
   if (!atomicFormFactor)
     {
       G4Exception("G4PenelopeRayleighModel::ReadDataFile()",
           "em2045",FatalException,
           "Unable to allocate the atomicFormFactor data table");
       delete theFFVec;
       return;
     }
   atomicFormFactor->insert(std::make_pair(Z,theFFVec));
   file.close();
   return;
 }

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◆ SampleSecondaries()

void G4PenelopeRayleighModel::SampleSecondaries	(	std::vector< G4DynamicParticle >	,
		const G4MaterialCutsCouple *	couple,
		const G4DynamicParticle *	aDynamicGamma,
		G4double	tmin,
		G4double	maxEnergy
	)

virtual

Implements G4VEmModel.

Definition at line 422 of file G4PenelopeRayleighModel.cc.

 {
   // Sampling of the Rayleigh final state (namely, scattering angle of the photon)
   // from the Penelope2008 model. The scattering angle is sampled from the atomic
   // cross section dOmega/d(cosTheta) from Born ("Atomic Phyisics", 1969), disregarding
   // anomalous scattering effects. The Form Factor F(Q) function which appears in the
   // analytical cross section is retrieved via the method GetFSquared(); atomic data
   // are tabulated for F(Q). Form factor for compounds is calculated according to
   // the additivity rule. The sampling from the F(Q) is made via a Rational Inverse
   // Transform with Aliasing (RITA) algorithm; RITA parameters are calculated once
   // for each material and managed by G4PenelopeSamplingData objects.
   // The sampling algorithm (rejection method) has efficiency 67% at low energy, and
   // increases with energy. For E=100 keV the efficiency is 100% and 86% for
   // hydrogen and uranium, respectively.
 
   if (verboseLevel > 3)
     G4cout << "Calling SamplingSecondaries() of G4PenelopeRayleighModel" << G4endl;
 
   G4double photonEnergy0 = aDynamicGamma->GetKineticEnergy();
 
   if (photonEnergy0 <= fIntrinsicLowEnergyLimit)
     {
       fParticleChange->ProposeTrackStatus(fStopAndKill);
       fParticleChange->SetProposedKineticEnergy(0.);
       fParticleChange->ProposeLocalEnergyDeposit(photonEnergy0);
       return ;
     }
 
   G4ParticleMomentum photonDirection0 = aDynamicGamma->GetMomentumDirection();
 
   const G4Material* theMat = couple->GetMaterial();
 
 
   //1) Verify if tables are ready
   //Either Initialize() was not called, or we are in a slave and InitializeLocal() was
   //not invoked
   if (!pMaxTable || !samplingTable || !logAtomicCrossSection || !atomicFormFactor ||
       !logFormFactorTable)
     {
       //create a **thread-local** version of the table. Used only for G4EmCalculator and
       //Unit Tests
       fLocalTable = true;
       if (!logAtomicCrossSection)
     logAtomicCrossSection = new std::map<G4int,G4PhysicsFreeVector*>;
       if (!atomicFormFactor)
     atomicFormFactor = new std::map<G4int,G4PhysicsFreeVector*>;
       if (!logFormFactorTable)
     logFormFactorTable = new std::map<const G4Material*,G4PhysicsFreeVector*>;
       if (!pMaxTable)
     pMaxTable = new std::map<const G4Material*,G4PhysicsFreeVector*>;
       if (!samplingTable)
     samplingTable = new std::map<const G4Material*,G4PenelopeSamplingData*>;
     }
 
   if (!samplingTable->count(theMat))
     {
       //If we are here, it means that Initialize() was inkoved, but the MaterialTable was
       //not filled up. This can happen in a UnitTest
       if (verboseLevel > 0)
     {
       //Issue a G4Exception (warning) only in verbose mode
       G4ExceptionDescription ed;
       ed << "Unable to find the samplingTable data for " <<
         theMat->GetName() << G4endl;
       ed << "This can happen only in Unit Tests" << G4endl;
       G4Exception("G4PenelopeRayleighModel::SampleSecondaries()",
               "em2019",JustWarning,ed);
     }
       const G4ElementVector* theElementVector = theMat->GetElementVector();
       //protect file reading via autolock
       G4AutoLock lock(&PenelopeRayleighModelMutex);
       for (size_t j=0;j<theMat->GetNumberOfElements();j++)
     {
       G4int iZ = (G4int) theElementVector->at(j)->GetZ();
       if (!logAtomicCrossSection->count(iZ))
         {
           lock.lock();
           ReadDataFile(iZ);
           lock.unlock();
         }
     }
       lock.lock();
       //1) If the table has not been built for the material, do it!
       if (!logFormFactorTable->count(theMat))
     BuildFormFactorTable(theMat);
 
       //2) retrieve or build the sampling table
       if (!(samplingTable->count(theMat)))
     InitializeSamplingAlgorithm(theMat);
 
       //3) retrieve or build the pMax data
       if (!pMaxTable->count(theMat))
     GetPMaxTable(theMat);
       lock.unlock();
     }
 
   //Ok, restart the job
 
   G4PenelopeSamplingData* theDataTable = samplingTable->find(theMat)->second;
   G4PhysicsFreeVector* thePMax = pMaxTable->find(theMat)->second;
 
   G4double cosTheta = 1.0;
 
   //OK, ready to go!
   G4double qmax = 2.0*photonEnergy0/electron_mass_c2; //this is non-dimensional now
 
   if (qmax < 1e-10) //very low momentum transfer
     {
       G4bool loopAgain=false;
       do
     {
       loopAgain = false;
       cosTheta = 1.0-2.0*G4UniformRand();
       G4double G = 0.5*(1+cosTheta*cosTheta);
       if (G4UniformRand()>G)
         loopAgain = true;
     }while(loopAgain);
     }
   else //larger momentum transfer
     {
       size_t nData = theDataTable->GetNumberOfStoredPoints();
       G4double LastQ2inTheTable = theDataTable->GetX(nData-1);
       G4double q2max = std::min(qmax*qmax,LastQ2inTheTable);
 
       G4bool loopAgain = false;
       G4double MaxPValue = thePMax->Value(photonEnergy0);
       G4double xx=0;
 
       //Sampling by rejection method. The rejection function is
       //G = 0.5*(1+cos^2(theta))
       //
       do{
     loopAgain = false;
     G4double RandomMax = G4UniformRand()*MaxPValue;
     xx = theDataTable->SampleValue(RandomMax);
     //xx is a random value of q^2 in (0,q2max),sampled according to
     //F(Q^2) via the RITA algorithm
     if (xx > q2max)
       loopAgain = true;
     cosTheta = 1.0-2.0*xx/q2max;
     G4double G = 0.5*(1+cosTheta*cosTheta);
     if (G4UniformRand()>G)
       loopAgain = true;
       }while(loopAgain);
     }
 
   G4double sinTheta = std::sqrt(1-cosTheta*cosTheta);
 
   // Scattered photon angles. ( Z - axis along the parent photon)
   G4double phi = twopi * G4UniformRand() ;
   G4double dirX = sinTheta*std::cos(phi);
   G4double dirY = sinTheta*std::sin(phi);
   G4double dirZ = cosTheta;
 
   // Update G4VParticleChange for the scattered photon
   G4ThreeVector photonDirection1(dirX, dirY, dirZ);
 
   photonDirection1.rotateUz(photonDirection0);
   fParticleChange->ProposeMomentumDirection(photonDirection1) ;
   fParticleChange->SetProposedKineticEnergy(photonEnergy0) ;
 
   return;
 }

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◆ SetParticle()

void G4PenelopeRayleighModel::SetParticle ( const G4ParticleDefinition * p )

private

Definition at line 1364 of file G4PenelopeRayleighModel.cc.

 {
   if(!fParticle) {
     fParticle = p;
   }
 }

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◆ SetVerbosityLevel()

void G4PenelopeRayleighModel::SetVerbosityLevel ( G4int lev )

inline

Definition at line 84 of file G4PenelopeRayleighModel.hh.

84 {verboseLevel = lev;};

G4PenelopeRayleighModel::verboseLevel

G4int verboseLevel

Definition: G4PenelopeRayleighModel.hh:105

Member Data Documentation

◆ atomicFormFactor

std::map<G4int,G4PhysicsFreeVector*>* G4PenelopeRayleighModel::atomicFormFactor

private

Definition at line 110 of file G4PenelopeRayleighModel.hh.

◆ fIntrinsicHighEnergyLimit

G4double G4PenelopeRayleighModel::fIntrinsicHighEnergyLimit

private

Definition at line 103 of file G4PenelopeRayleighModel.hh.

◆ fIntrinsicLowEnergyLimit

G4double G4PenelopeRayleighModel::fIntrinsicLowEnergyLimit

private

Definition at line 102 of file G4PenelopeRayleighModel.hh.

◆ fLocalTable

G4bool G4PenelopeRayleighModel::fLocalTable

private

Definition at line 131 of file G4PenelopeRayleighModel.hh.

◆ fParticle

const G4ParticleDefinition* G4PenelopeRayleighModel::fParticle

protected

Definition at line 92 of file G4PenelopeRayleighModel.hh.

◆ fParticleChange

G4ParticleChangeForGamma* G4PenelopeRayleighModel::fParticleChange

protected

Definition at line 91 of file G4PenelopeRayleighModel.hh.

◆ isInitialised

G4bool G4PenelopeRayleighModel::isInitialised

private

Definition at line 106 of file G4PenelopeRayleighModel.hh.

◆ logAtomicCrossSection

std::map<G4int,G4PhysicsFreeVector*>* G4PenelopeRayleighModel::logAtomicCrossSection

private

Definition at line 109 of file G4PenelopeRayleighModel.hh.

◆ logEnergyGridPMax

G4DataVector G4PenelopeRayleighModel::logEnergyGridPMax

private

Definition at line 116 of file G4PenelopeRayleighModel.hh.

◆ logFormFactorTable

std::map<const G4Material*,G4PhysicsFreeVector*>* G4PenelopeRayleighModel::logFormFactorTable

private

Definition at line 114 of file G4PenelopeRayleighModel.hh.

◆ logQSquareGrid

G4DataVector G4PenelopeRayleighModel::logQSquareGrid

private

Definition at line 113 of file G4PenelopeRayleighModel.hh.

◆ pMaxTable

std::map<const G4Material*,G4PhysicsFreeVector*>* G4PenelopeRayleighModel::pMaxTable

private

Definition at line 117 of file G4PenelopeRayleighModel.hh.

◆ samplingTable

std::map<const G4Material*,G4PenelopeSamplingData*>* G4PenelopeRayleighModel::samplingTable

private

Definition at line 119 of file G4PenelopeRayleighModel.hh.

◆ verboseLevel

G4int G4PenelopeRayleighModel::verboseLevel

private

Definition at line 105 of file G4PenelopeRayleighModel.hh.

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

Public Member Functions

Protected Attributes

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ G4PenelopeRayleighModel() [1/2]

◆ ~G4PenelopeRayleighModel()

◆ G4PenelopeRayleighModel() [2/2]

Member Function Documentation

◆ BuildFormFactorTable()

◆ ClearTables()

◆ ComputeCrossSectionPerAtom()

◆ DumpFormFactorTable()

◆ GetFSquared()

◆ GetPMaxTable()

◆ GetVerbosityLevel()

◆ Initialise()

◆ InitialiseLocal()

◆ InitializeSamplingAlgorithm()

◆ operator=()

◆ ReadDataFile()

◆ SampleSecondaries()

◆ SetParticle()

◆ SetVerbosityLevel()

Member Data Documentation

◆ atomicFormFactor

◆ fIntrinsicHighEnergyLimit

◆ fIntrinsicLowEnergyLimit

◆ fLocalTable

◆ fParticle

◆ fParticleChange

◆ isInitialised

◆ logAtomicCrossSection

◆ logEnergyGridPMax

◆ logFormFactorTable

◆ logQSquareGrid

◆ pMaxTable

◆ samplingTable

◆ verboseLevel