#include <G4HeatedKleinNishinaCompton.hh>

Inheritance diagram for G4HeatedKleinNishinaCompton:

Public Member Functions
	G4HeatedKleinNishinaCompton (const G4ParticleDefinition *p=nullptr, const G4String &nam="Heated-Klein-Nishina")

virtual	~G4HeatedKleinNishinaCompton ()

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

void	SetElectronTemperature (G4double t)

G4double	GetElectronTemperature ()

Public Member Functions inherited from G4KleinNishinaCompton
	G4KleinNishinaCompton (const G4ParticleDefinition *p=nullptr, const G4String &nam="Klein-Nishina")

virtual	~G4KleinNishinaCompton ()

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

virtual void	InitialiseLocal (const G4ParticleDefinition , G4VEmModel masterModel) override

virtual G4double	ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double kinEnergy, G4double Z, G4double A, G4double cut, G4double emax) override

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

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

virtual	~G4VEmModel ()

virtual void	Initialise (const G4ParticleDefinition *, const G4DataVector &)=0

virtual void	SampleSecondaries (std::vector< G4DynamicParticle * > , const G4MaterialCutsCouple , const G4DynamicParticle *, G4double tmin=0.0, G4double tmax=DBL_MAX)=0

virtual void	InitialiseLocal (const G4ParticleDefinition , G4VEmModel masterModel)

virtual void	InitialiseForMaterial (const G4ParticleDefinition , const G4Material )

virtual void	InitialiseForElement (const G4ParticleDefinition *, G4int Z)

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

virtual G4double	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	ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double kinEnergy, G4double Z, G4double A=0., G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

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 * > *)

virtual 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)

G4int	SelectRandomAtomNumber (const G4Material *)

G4int	SelectIsotopeNumber (const G4Element *)

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	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) const

void	SetPolarAngleLimit (G4double)

void	SetSecondaryThreshold (G4double)

void	SetLPMFlag (G4bool val)

void	SetDeexcitationFlag (G4bool val)

void	SetForceBuildTable (G4bool val)

void	SetFluctuationFlag (G4bool val)

void	SetMasterThread (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 *)

const G4Element *	GetCurrentElement () const

const G4Isotope *	GetCurrentIsotope () const

G4bool	IsLocked () const

void	SetLocked (G4bool)

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

	G4VEmModel (const G4VEmModel &)=delete

Additional Inherited Members
Protected Member Functions inherited from G4VEmModel
G4ParticleChangeForLoss *	GetParticleChangeForLoss ()

G4ParticleChangeForGamma *	GetParticleChangeForGamma ()

virtual G4double	MaxSecondaryEnergy (const G4ParticleDefinition *, G4double kineticEnergy)

const G4MaterialCutsCouple *	CurrentCouple () const

void	SetCurrentElement (const G4Element *)

Protected Attributes inherited from G4KleinNishinaCompton
G4ParticleDefinition *	theGamma

G4ParticleDefinition *	theElectron

G4ParticleChangeForGamma *	fParticleChange

G4double	lowestSecondaryEnergy

Protected Attributes inherited from G4VEmModel
G4ElementData *	fElementData

G4VParticleChange *	pParticleChange

G4PhysicsTable *	xSectionTable

const G4Material *	pBaseMaterial

const std::vector< G4double > *	theDensityFactor

const std::vector< G4int > *	theDensityIdx

size_t	idxTable

G4bool	lossFlucFlag

G4double	inveplus

G4double	pFactor

Detailed Description

Definition at line 56 of file G4HeatedKleinNishinaCompton.hh.

Constructor & Destructor Documentation

◆ G4HeatedKleinNishinaCompton()

G4HeatedKleinNishinaCompton::G4HeatedKleinNishinaCompton	(	const G4ParticleDefinition *	p = `nullptr`,
		const G4String &	nam = `"Heated-Klein-Nishina"`
	)

explicit

Definition at line 66 of file G4HeatedKleinNishinaCompton.cc.

  : G4KleinNishinaCompton(p, nam)
{
  fTemperature = 1.0*keV;
}

◆ ~G4HeatedKleinNishinaCompton()

G4HeatedKleinNishinaCompton::~G4HeatedKleinNishinaCompton ( )

virtual

Definition at line 75 of file G4HeatedKleinNishinaCompton.cc.

76{}

Member Function Documentation

◆ GetElectronTemperature()

G4double G4HeatedKleinNishinaCompton::GetElectronTemperature ( )

inline

Definition at line 73 of file G4HeatedKleinNishinaCompton.hh.

73{ return fTemperature; };

◆ SampleSecondaries()

void G4HeatedKleinNishinaCompton::SampleSecondaries	(	std::vector< G4DynamicParticle * > *	fvect,
		const G4MaterialCutsCouple *	,
		const G4DynamicParticle *	aDynamicGamma,
		G4double	tmin,
		G4double	maxEnergy
	)

finalvirtual

Reimplemented from G4KleinNishinaCompton.

Definition at line 80 of file G4HeatedKleinNishinaCompton.cc.

{
  // do nothing below the threshold
  if(aDynamicGamma->GetKineticEnergy() <= LowEnergyLimit()) { return; }
 
  // The scattered gamma energy is sampled according to Klein - Nishina formula.
  // The random number techniques of Butcher & Messel are used 
  // (Nuc Phys 20(1960),15).
  // Note : Effects due to binding of atomic electrons are negliged.
 
  // We start to prepare a heated electron from Maxwell distribution. 
  // Then we try to boost to the electron rest frame and make scattering.
  // The final step is to recover new gamma 4momentum in the lab frame
 
  G4double eMomentumC2  = G4RandGamma::shoot(1.5, 1.);
  eMomentumC2          *= 2*electron_mass_c2*fTemperature; // electron (pc)^2
  G4ThreeVector eMomDir = G4RandomDirection();
  eMomDir              *= std::sqrt(eMomentumC2);
  G4double eEnergy      = std::sqrt(eMomentumC2+electron_mass_c2*electron_mass_c2);
  G4LorentzVector electron4v = G4LorentzVector(eMomDir,eEnergy);
  G4ThreeVector bst = electron4v.boostVector();
 
  G4LorentzVector gamma4v = aDynamicGamma->Get4Momentum();
  gamma4v.boost(-bst);
 
  G4ThreeVector gammaMomV = gamma4v.vect();
  G4double  gamEnergy0    = gammaMomV.mag();
 
 
  // G4double gamEnergy0 = aDynamicGamma->GetKineticEnergy();
  G4double E0_m = gamEnergy0 / electron_mass_c2 ;
 
  // G4ThreeVector gamDirection0 = /aDynamicGamma->GetMomentumDirection();
 
  G4ThreeVector gamDirection0 = gammaMomV/gamEnergy0;
  
  // sample the energy rate of the scattered gamma in the electron rest frame
  //
 
  G4double epsilon, epsilonsq, onecost, sint2, greject ;
 
  G4double eps0       = 1./(1. + 2.*E0_m);
  G4double epsilon0sq = eps0*eps0;
  G4double alpha1     = - G4Log(eps0);
  G4double alpha2     = 0.5*(1.- epsilon0sq);
 
  G4int nloop = 0;
  do 
  {
    ++nloop;
    // false interaction if too many iterations
    if(nloop > 1000) { return; }
 
    if ( alpha1/(alpha1+alpha2) > G4UniformRand() ) 
    {
      epsilon   = G4Exp(-alpha1*G4UniformRand());   // eps0**r
      epsilonsq = epsilon*epsilon; 
 
    } 
    else 
    {
      epsilonsq = epsilon0sq + (1.- epsilon0sq)*G4UniformRand();
      epsilon   = sqrt(epsilonsq);
    };
 
    onecost = (1.- epsilon)/(epsilon*E0_m);
    sint2   = onecost*(2.-onecost);
    greject = 1. - epsilon*sint2/(1.+ epsilonsq);
 
    // Loop checking, 03-Aug-2015, Vladimir Ivanchenko
  } while (greject < G4UniformRand());
 
  //
  // scattered gamma angles. ( Z - axis along the parent gamma)
  //
 
  G4double cosTeta = 1. - onecost; 
  G4double sinTeta = sqrt (sint2);
  G4double Phi     = twopi * G4UniformRand();
  G4double dirx    = sinTeta*cos(Phi), diry = sinTeta*sin(Phi), dirz = cosTeta;
 
  //
  // update G4VParticleChange for the scattered gamma
  //
   
  G4ThreeVector gamDirection1 ( dirx,diry,dirz );
  gamDirection1.rotateUz(gamDirection0);
  G4double gamEnergy1  = epsilon*gamEnergy0;
  gamDirection1       *= gamEnergy1;
 
  G4LorentzVector gamma4vfinal = G4LorentzVector(gamDirection1,gamEnergy1);
 
  
  // kinematic of the scattered electron
  //
 
  G4double eKinEnergy = gamEnergy0 - gamEnergy1;
  G4ThreeVector eDirection = gamEnergy0*gamDirection0 - gamEnergy1*gamDirection1;
  eDirection = eDirection.unit();
  G4double eFinalMom = std::sqrt(eKinEnergy*(eKinEnergy+2*electron_mass_c2));
  eDirection *= eFinalMom;
  G4LorentzVector e4vfinal = G4LorentzVector(eDirection,gamEnergy1+electron_mass_c2);
  
  gamma4vfinal.boost(bst);
  e4vfinal.boost(bst);
 
  gamDirection1 = gamma4vfinal.vect();
  gamEnergy1 = gamDirection1.mag(); 
  gamDirection1 /= gamEnergy1;
 
  G4double edep = 0.0;
  if(gamEnergy1 > lowestSecondaryEnergy) {
    fParticleChange->ProposeMomentumDirection(gamDirection1);
    fParticleChange->SetProposedKineticEnergy(gamEnergy1);
  } else { 
    fParticleChange->ProposeTrackStatus(fStopAndKill);
    fParticleChange->SetProposedKineticEnergy(0.0);
    edep = gamEnergy1;
  }
 
  //
  // kinematic of the scattered electron
  //
  eKinEnergy = e4vfinal.t()-electron_mass_c2;
 
  if(eKinEnergy > lowestSecondaryEnergy) {
 
    eDirection = e4vfinal.vect().unit();
 
    // create G4DynamicParticle object for the electron.
    G4DynamicParticle* dp = 
      new G4DynamicParticle(theElectron,eDirection,eKinEnergy);
    fvect->push_back(dp);
  } else {
    edep += eKinEnergy;  
  }
  // energy balance
  if(edep > 0.0) { 
    fParticleChange->ProposeLocalEnergyDeposit(edep);
  }
}

◆ SetElectronTemperature()

void G4HeatedKleinNishinaCompton::SetElectronTemperature ( G4double t )

inline

Definition at line 72 of file G4HeatedKleinNishinaCompton.hh.

72{ fTemperature = t; };

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

Public Member Functions

Additional Inherited Members