#include <G4IonCoulombScatteringModel.hh>

Inheritance diagram for G4IonCoulombScatteringModel:

Public Member Functions
	G4IonCoulombScatteringModel (const G4String &nam="IonCoulombScattering")

virtual	~G4IonCoulombScatteringModel ()

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

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

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

void	SetRecoilThreshold (G4double eth)

void	SetHeavyIonCorr (G4int b)

G4int	GetHeavyIonCorr ()

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 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	ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double kinEnergy, G4double Z, G4double A=0., 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 )

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

virtual void	DefineForRegion (const G4Region *)

void	InitialiseElementSelectors (const G4ParticleDefinition *, const G4DataVector &)

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)

void	SetParticleChange (G4VParticleChange , G4VEmFluctuationModel f=0)

void	SetCrossSectionTable (G4PhysicsTable *)

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

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	ForceBuildTable (G4bool val)

G4double	MaxSecondaryKinEnergy (const G4DynamicParticle *dynParticle)

const G4String &	GetName () const

void	SetCurrentCouple (const G4MaterialCutsCouple *)

const G4Element *	GetCurrentElement () const

Protected Member Functions
void	DefineMaterial (const G4MaterialCutsCouple *)

void	SetupParticle (const G4ParticleDefinition *)

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
G4ParticleTable *	theParticleTable

G4ParticleChangeForGamma *	fParticleChange

G4NistManager *	fNistManager

G4IonCoulombCrossSection *	ioncross

const std::vector< G4double > *	pCuts

const G4MaterialCutsCouple *	currentCouple

const G4Material *	currentMaterial

const G4Element *	currentElement

G4int	currentMaterialIndex

G4int	heavycorr

G4double	cosThetaMin

G4double	recoilThreshold

const G4ParticleDefinition *	particle

const G4ParticleDefinition *	theProton

G4double	mass

G4double	lowEnergyLimit

Protected Attributes inherited from G4VEmModel
G4VParticleChange *	pParticleChange

G4PhysicsTable *	xSectionTable

const std::vector< G4double > *	theDensityFactor

const std::vector< G4int > *	theDensityIdx

Detailed Description

Definition at line 71 of file G4IonCoulombScatteringModel.hh.

Constructor & Destructor Documentation

◆ G4IonCoulombScatteringModel()

G4IonCoulombScatteringModel::G4IonCoulombScatteringModel ( const G4String & nam = "IonCoulombScattering" )

Definition at line 73 of file G4IonCoulombScatteringModel.cc.

  : G4VEmModel(nam),
 
    cosThetaMin(1.0),
    isInitialised(false)
{
    fNistManager = G4NistManager::Instance();
    theParticleTable = G4ParticleTable::GetParticleTable();
    theProton   = G4Proton::Proton();
 
    pCuts=0;
    currentMaterial = 0;
    currentElement  = 0;
        currentCouple = 0;
 
        lowEnergyLimit  = 100*eV;
    recoilThreshold = 0.*eV;
    heavycorr =0;
    particle = 0;
    mass=0;
    currentMaterialIndex = -1;
 
    ioncross = new G4IonCoulombCrossSection(); 
 
}

◆ ~G4IonCoulombScatteringModel()

G4IonCoulombScatteringModel::~G4IonCoulombScatteringModel ( )

virtual

Definition at line 102 of file G4IonCoulombScatteringModel.cc.

103{ delete ioncross;}

Member Function Documentation

◆ ComputeCrossSectionPerAtom()

G4double G4IonCoulombScatteringModel::ComputeCrossSectionPerAtom	(	const G4ParticleDefinition *	p,
		G4double	kinEnergy,
		G4double	Z,
		G4double	A,
		G4double	cut,
		G4double	emax
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 127 of file G4IonCoulombScatteringModel.cc.

{
 
    SetupParticle(p);
 
    G4double cross =0.0;
    if(kinEnergy < lowEnergyLimit) return cross;
 
    DefineMaterial(CurrentCouple());
 
        G4int iz          = G4int(Z);
 
    //from lab to pCM & mu_rel of effective particle
        ioncross->SetupKinematic(kinEnergy, cutEnergy,iz);
 
 
        ioncross->SetupTarget(Z, kinEnergy, heavycorr);
 
    cross = ioncross->NuclearCrossSection();
 
//cout<< "..........cross "<<G4BestUnit(cross,"Surface") <<endl;
  return cross;
}

Referenced by SampleSecondaries().

◆ DefineMaterial()

void G4IonCoulombScatteringModel::DefineMaterial ( const G4MaterialCutsCouple * cup )

inlineprotected

Definition at line 157 of file G4IonCoulombScatteringModel.hh.

{ 
    if(cup != currentCouple) {
            currentCouple = cup;
            currentMaterial = cup->GetMaterial();
                currentMaterialIndex = currentCouple->GetIndex();
 
        }
}

Referenced by ComputeCrossSectionPerAtom(), and SampleSecondaries().

◆ GetHeavyIonCorr()

G4int G4IonCoulombScatteringModel::GetHeavyIonCorr ( )

inline

Definition at line 100 of file G4IonCoulombScatteringModel.hh.

100{return heavycorr; };

◆ Initialise()

void G4IonCoulombScatteringModel::Initialise	(	const G4ParticleDefinition *	p,
		const G4DataVector &
	)

virtual

Implements G4VEmModel.

Definition at line 107 of file G4IonCoulombScatteringModel.cc.

{
    SetupParticle(p);
    currentCouple = 0;
    currentMaterialIndex = -1;
    cosThetaMin = cos(PolarAngleLimit());
    ioncross->Initialise(p,cosThetaMin);
 
        pCuts = G4ProductionCutsTable::GetProductionCutsTable()->GetEnergyCutsVector(3);
 
 
    if(!isInitialised) {
      isInitialised = true;
      fParticleChange = GetParticleChangeForGamma();
    }
}

◆ SampleSecondaries()

void G4IonCoulombScatteringModel::SampleSecondaries	(	std::vector< G4DynamicParticle * > *	fvect,
		const G4MaterialCutsCouple *	couple,
		const G4DynamicParticle *	dp,
		G4double	tmin,
		G4double	maxEnergy
	)

virtual

Implements G4VEmModel.

Definition at line 159 of file G4IonCoulombScatteringModel.cc.

{
    G4double kinEnergy = dp->GetKineticEnergy();
 
    if(kinEnergy < lowEnergyLimit) return;
    
    DefineMaterial(couple);
 
    SetupParticle(dp->GetDefinition());
 
    // Choose nucleus
    currentElement = SelectRandomAtom(couple,particle,
                                    kinEnergy,cutEnergy,kinEnergy);
 
    G4double Z  = currentElement->GetZ();
    G4int iz          = G4int(Z);
    G4int ia = SelectIsotopeNumber(currentElement);
    G4double mass2 = G4NucleiProperties::GetNuclearMass(ia, iz);
 
 
 
    G4double cross= ComputeCrossSectionPerAtom(particle,kinEnergy, Z,
                                kinEnergy, cutEnergy, kinEnergy) ;
    if(cross == 0.0) { return; }
    
    //scattering angle, z1 == (1-cost)
    G4double z1 = ioncross->SampleCosineTheta(); 
        if(z1 > 2.0)      { z1 = 2.0; }
        else if(z1 < 0.0) { z1 = 0.0; }
 
    G4double cost = 1.0 - z1;
    G4double sint = sqrt(z1*(1.0 + cost));
    G4double phi  = twopi * G4UniformRand();
 
 
    // kinematics in the Lab system
    G4double etot = kinEnergy + mass;
    G4double mom2=  kinEnergy*(kinEnergy+2.0*mass);
    G4double ptot = sqrt(mom2);
 
    //CM particle 1
    G4double bet  = ptot/(etot + mass2);
    G4double gam  = 1.0/sqrt((1.0 - bet)*(1.0 + bet));
 
    //CM    
    G4double momCM2= ioncross->GetMomentum2();
    G4double momCM =std::sqrt(momCM2); 
        //energy & momentum after scattering of incident particle
    G4double pxCM = momCM*sint*cos(phi);
        G4double pyCM = momCM*sint*sin(phi);
        G4double pzCM = momCM*cost;
    G4double eCM  = sqrt(momCM2 + mass*mass);
 
    //CM--->Lab
    G4ThreeVector v1(pxCM , pyCM, gam*(pzCM + bet*eCM));
    G4ThreeVector dir = dp->GetMomentumDirection(); 
 
    G4ThreeVector newDirection = v1.unit();
    newDirection.rotateUz(dir);   
  
    fParticleChange->ProposeMomentumDirection(newDirection);   
  
    // V.Ivanchenko fix of final energies after scattering
    // recoil.......................................
    //G4double trec =(1.0 - cost)* mass2*(etot*etot - mass*mass )/
    //          (mass*mass + mass2*mass2+ 2.*mass2*etot);
        //G4double finalT = kinEnergy - trec;
 
    // new computation
        G4double finalT = gam*(eCM + bet*pzCM) - mass;
        G4double trec = kinEnergy - finalT;
 
    if(finalT <= lowEnergyLimit) { 
      trec = kinEnergy;  
      finalT = 0.0;
    } else if(trec < 0.0) {
      trec = 0.0;  
      finalT = kinEnergy;
    }
    
    fParticleChange->SetProposedKineticEnergy(finalT);
 
    G4double tcut = recoilThreshold;
        if(pCuts) { tcut= std::max(tcut,(*pCuts)[currentMaterialIndex]); 
 
            //G4cout<<" tcut eV "<<tcut/eV<<endl;
            }
 
    if(trec > tcut) {
            G4ParticleDefinition* ion = theParticleTable->GetIon(iz, ia, 0.0);
            G4double plab = sqrt(finalT*(finalT + 2.0*mass));
            G4ThreeVector p2 = (ptot*dir - plab*newDirection).unit();
            G4DynamicParticle* newdp  = new G4DynamicParticle(ion, p2, trec);
                fvect->push_back(newdp);
    } else if(trec > 0.0) {
            fParticleChange->ProposeLocalEnergyDeposit(trec);
            fParticleChange->ProposeNonIonizingEnergyDeposit(trec);
    }
 
 
}

◆ SetHeavyIonCorr()

void G4IonCoulombScatteringModel::SetHeavyIonCorr ( G4int b )

inline

Definition at line 99 of file G4IonCoulombScatteringModel.hh.

99{heavycorr=b; };

◆ SetRecoilThreshold()

void G4IonCoulombScatteringModel::SetRecoilThreshold ( G4double eth )

inline

Definition at line 180 of file G4IonCoulombScatteringModel.hh.

{
    recoilThreshold = eth;
}

◆ SetupParticle()

void G4IonCoulombScatteringModel::SetupParticle ( const G4ParticleDefinition * p )

inlineprotected

Definition at line 170 of file G4IonCoulombScatteringModel.hh.

{
    if(p != particle) {
            particle = p;
            mass = particle->GetPDGMass();
        ioncross->SetupParticle(p);
        }
}

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

Member Data Documentation

◆ cosThetaMin

G4double G4IonCoulombScatteringModel::cosThetaMin

protected

Definition at line 139 of file G4IonCoulombScatteringModel.hh.

Referenced by Initialise().

◆ currentCouple

const G4MaterialCutsCouple* G4IonCoulombScatteringModel::currentCouple

protected

Definition at line 131 of file G4IonCoulombScatteringModel.hh.

Referenced by DefineMaterial(), G4IonCoulombScatteringModel(), and Initialise().

◆ currentElement

const G4Element* G4IonCoulombScatteringModel::currentElement

protected

Definition at line 133 of file G4IonCoulombScatteringModel.hh.

Referenced by G4IonCoulombScatteringModel(), and SampleSecondaries().

◆ currentMaterial

const G4Material* G4IonCoulombScatteringModel::currentMaterial

protected

Definition at line 132 of file G4IonCoulombScatteringModel.hh.

Referenced by DefineMaterial(), and G4IonCoulombScatteringModel().

◆ currentMaterialIndex

G4int G4IonCoulombScatteringModel::currentMaterialIndex

protected

Definition at line 134 of file G4IonCoulombScatteringModel.hh.

Referenced by DefineMaterial(), G4IonCoulombScatteringModel(), Initialise(), and SampleSecondaries().

◆ fNistManager

G4NistManager* G4IonCoulombScatteringModel::fNistManager

protected

Definition at line 127 of file G4IonCoulombScatteringModel.hh.

Referenced by G4IonCoulombScatteringModel().

◆ fParticleChange

G4ParticleChangeForGamma* G4IonCoulombScatteringModel::fParticleChange

protected

Definition at line 126 of file G4IonCoulombScatteringModel.hh.

Referenced by Initialise(), and SampleSecondaries().

◆ heavycorr

G4int G4IonCoulombScatteringModel::heavycorr

protected

Definition at line 137 of file G4IonCoulombScatteringModel.hh.

Referenced by ComputeCrossSectionPerAtom(), G4IonCoulombScatteringModel(), GetHeavyIonCorr(), and SetHeavyIonCorr().

◆ ioncross

G4IonCoulombCrossSection* G4IonCoulombScatteringModel::ioncross

protected

Definition at line 128 of file G4IonCoulombScatteringModel.hh.

Referenced by ComputeCrossSectionPerAtom(), G4IonCoulombScatteringModel(), Initialise(), SampleSecondaries(), SetupParticle(), and ~G4IonCoulombScatteringModel().

◆ lowEnergyLimit

G4double G4IonCoulombScatteringModel::lowEnergyLimit

protected

Definition at line 147 of file G4IonCoulombScatteringModel.hh.

Referenced by ComputeCrossSectionPerAtom(), G4IonCoulombScatteringModel(), and SampleSecondaries().

◆ mass

G4double G4IonCoulombScatteringModel::mass

protected

Definition at line 146 of file G4IonCoulombScatteringModel.hh.

Referenced by G4IonCoulombScatteringModel(), SampleSecondaries(), and SetupParticle().

◆ particle

const G4ParticleDefinition* G4IonCoulombScatteringModel::particle

protected

Definition at line 144 of file G4IonCoulombScatteringModel.hh.

Referenced by G4IonCoulombScatteringModel(), SampleSecondaries(), and SetupParticle().

◆ pCuts

const std::vector<G4double>* G4IonCoulombScatteringModel::pCuts

protected

Definition at line 130 of file G4IonCoulombScatteringModel.hh.

Referenced by G4IonCoulombScatteringModel(), Initialise(), and SampleSecondaries().

◆ recoilThreshold

G4double G4IonCoulombScatteringModel::recoilThreshold

protected

Definition at line 140 of file G4IonCoulombScatteringModel.hh.

Referenced by G4IonCoulombScatteringModel(), SampleSecondaries(), and SetRecoilThreshold().

◆ theParticleTable

G4ParticleTable* G4IonCoulombScatteringModel::theParticleTable

protected

Definition at line 125 of file G4IonCoulombScatteringModel.hh.

Referenced by G4IonCoulombScatteringModel(), and SampleSecondaries().

◆ theProton

const G4ParticleDefinition* G4IonCoulombScatteringModel::theProton

protected

Definition at line 145 of file G4IonCoulombScatteringModel.hh.

Referenced by G4IonCoulombScatteringModel().

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

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ G4IonCoulombScatteringModel()

◆ ~G4IonCoulombScatteringModel()

Member Function Documentation

◆ ComputeCrossSectionPerAtom()

◆ DefineMaterial()

◆ GetHeavyIonCorr()

◆ Initialise()

◆ SampleSecondaries()

◆ SetHeavyIonCorr()

◆ SetRecoilThreshold()

◆ SetupParticle()

Member Data Documentation

◆ cosThetaMin

◆ currentCouple

◆ currentElement

◆ currentMaterial

◆ currentMaterialIndex

◆ fNistManager

◆ fParticleChange

◆ heavycorr

◆ ioncross

◆ lowEnergyLimit

◆ mass

◆ particle

◆ pCuts

◆ recoilThreshold

◆ theParticleTable

◆ theProton