#include <G4BraggIonModel.hh>

Inheritance diagram for G4BraggIonModel:

Collaboration diagram for G4BraggIonModel:

Public Member Functions
	G4BraggIonModel (const G4ParticleDefinition *p=nullptr, const G4String &nam="BraggIon")

virtual	~G4BraggIonModel ()

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

virtual G4double	MinEnergyCut (const G4ParticleDefinition , const G4MaterialCutsCouple couple)

virtual G4double	ComputeCrossSectionPerElectron (const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy, G4double maxEnergy)

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

virtual G4double	CrossSectionPerVolume (const G4Material , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy, G4double maxEnergy)

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

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

virtual G4double	GetChargeSquareRatio (const G4ParticleDefinition , const G4Material , G4double kineticEnergy)

virtual G4double	GetParticleCharge (const G4ParticleDefinition p, const G4Material mat, G4double kineticEnergy)

virtual void	CorrectionsAlongStep (const G4MaterialCutsCouple , const G4DynamicParticle , G4double &eloss, G4double &niel, G4double length)

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

virtual	~G4VEmModel ()

virtual void	InitialiseLocal (const G4ParticleDefinition , G4VEmModel masterModel)

virtual void	InitialiseForMaterial (const G4ParticleDefinition , const G4Material )

virtual void	InitialiseForElement (const G4ParticleDefinition *, G4int Z)

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 void	StartTracking (G4Track *)

virtual G4double	Value (const G4MaterialCutsCouple , const G4ParticleDefinition , G4double kineticEnergy)

virtual G4double	MinPrimaryEnergy (const G4Material , const G4ParticleDefinition , G4double cut=0.0)

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 Member Functions
virtual G4double	MaxSecondaryEnergy (const G4ParticleDefinition *, G4double kinEnergy)

Protected Member Functions inherited from G4VEmModel
G4ParticleChangeForLoss *	GetParticleChangeForLoss ()

G4ParticleChangeForGamma *	GetParticleChangeForGamma ()

const G4MaterialCutsCouple *	CurrentCouple () const

void	SetCurrentElement (const G4Element *)

Private Member Functions
void	SetParticle (const G4ParticleDefinition *p)

G4double	HeEffChargeSquare (G4double z, G4double kinEnergyInMeV) const

G4BraggIonModel &	operator= (const G4BraggIonModel &right)

	G4BraggIonModel (const G4BraggIonModel &)

G4bool	HasMaterial (const G4Material *material)

G4double	StoppingPower (const G4Material *material, G4double kineticEnergy)

G4double	ElectronicStoppingPower (G4double z, G4double kineticEnergy) const

G4double	DEDX (const G4Material *material, G4double kineticEnergy)

Private Attributes
G4EmCorrections *	corr

const G4ParticleDefinition *	particle

G4ParticleDefinition *	theElectron

G4ParticleChangeForLoss *	fParticleChange

const G4Material *	currentMaterial

G4double	mass

G4double	spin

G4double	chargeSquare

G4double	massRate

G4double	ratio

G4double	lowestKinEnergy

G4double	HeMass

G4double	massFactor

G4double	corrFactor

G4double	rateMassHe2p

G4double	theZieglerFactor

G4int	iMolecula

G4int	iASTAR

G4bool	isIon

G4bool	isInitialised

Static Private Attributes
static G4ASTARStopping *	fASTAR = nullptr

Additional Inherited Members
Protected Attributes inherited from G4VEmModel
G4ElementData *	fElementData

G4VParticleChange *	pParticleChange

G4PhysicsTable *	xSectionTable

const std::vector< G4double > *	theDensityFactor

const std::vector< G4int > *	theDensityIdx

size_t	idxTable

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

Detailed Description

Definition at line 68 of file G4BraggIonModel.hh.

Constructor & Destructor Documentation

◆ G4BraggIonModel() [1/2]

G4BraggIonModel::G4BraggIonModel	(	const G4ParticleDefinition *	p = `nullptr`,
		const G4String &	nam = `"BraggIon"`
	)

Definition at line 78 of file G4BraggIonModel.cc.

   : G4VEmModel(nam),
     corr(nullptr),
     particle(nullptr),
     fParticleChange(nullptr),
     currentMaterial(nullptr),
     iMolecula(-1),
     iASTAR(-1),
     isIon(false),
     isInitialised(false)
 {
   SetHighEnergyLimit(2.0*MeV);
 
   HeMass           = 3.727417*GeV;
   rateMassHe2p     = HeMass/proton_mass_c2;
   lowestKinEnergy  = 1.0*keV/rateMassHe2p;
   massFactor       = 1000.*amu_c2/HeMass;
   theZieglerFactor = eV*cm2*1.0e-15;
   theElectron      = G4Electron::Electron();
   corrFactor       = 1.0;
   if(p) { SetParticle(p); }
   else  { SetParticle(theElectron); }
 }

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◆ ~G4BraggIonModel()

G4BraggIonModel::~G4BraggIonModel ( )

virtual

Definition at line 105 of file G4BraggIonModel.cc.

 {
   if(IsMaster()) { delete fASTAR; fASTAR = nullptr; }
 }

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◆ G4BraggIonModel() [2/2]

G4BraggIonModel::G4BraggIonModel ( const G4BraggIonModel & )

private

Member Function Documentation

◆ ComputeCrossSectionPerAtom()

G4double G4BraggIonModel::ComputeCrossSectionPerAtom	(	const G4ParticleDefinition *	p,
		G4double	kineticEnergy,
		G4double	Z,
		G4double	A,
		G4double	cutEnergy,
		G4double	maxEnergy
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 206 of file G4BraggIonModel.cc.

 {
   G4double cross = Z*ComputeCrossSectionPerElectron
                                          (p,kineticEnergy,cutEnergy,maxEnergy);
   return cross;
 }

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◆ ComputeCrossSectionPerElectron()

G4double G4BraggIonModel::ComputeCrossSectionPerElectron	(	const G4ParticleDefinition *	p,
		G4double	kineticEnergy,
		G4double	cutEnergy,
		G4double	maxEnergy
	)

virtual

Definition at line 177 of file G4BraggIonModel.cc.

 {
   G4double cross     = 0.0;
   G4double tmax      = MaxSecondaryEnergy(p, kineticEnergy);
   G4double maxEnergy = std::min(tmax,maxKinEnergy);
   if(cutEnergy < tmax) {
 
     G4double energy  = kineticEnergy + mass;
     G4double energy2 = energy*energy;
     G4double beta2   = kineticEnergy*(kineticEnergy + 2.0*mass)/energy2;
     cross = (maxEnergy - cutEnergy)/(cutEnergy*maxEnergy) 
       - beta2*G4Log(maxEnergy/cutEnergy)/tmax;
 
     if( 0.0 < spin ) { cross += 0.5*(maxEnergy - cutEnergy)/energy2; }
 
     cross *= twopi_mc2_rcl2*chargeSquare/beta2;
   }
  //   G4cout << "BR: e= " << kineticEnergy << " tmin= " << cutEnergy 
  //          << " tmax= " << tmax << " cross= " << cross << G4endl;
  
   return cross;
 }

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◆ ComputeDEDXPerVolume()

G4double G4BraggIonModel::ComputeDEDXPerVolume	(	const G4Material *	material,
		const G4ParticleDefinition *	p,
		G4double	kineticEnergy,
		G4double	cutEnergy
	)

virtual

Reimplemented from G4VEmModel.

Reimplemented in G4BraggNoDeltaModel.

Definition at line 235 of file G4BraggIonModel.cc.

 {
   G4double tmax  = MaxSecondaryEnergy(p, kineticEnergy);
   G4double tmin  = min(cutEnergy, tmax);
   G4double tkin  = kineticEnergy/massRate;
   G4double dedx  = 0.0;
 
   if(tkin < lowestKinEnergy) {
     dedx = DEDX(material, lowestKinEnergy)*sqrt(tkin/lowestKinEnergy);
   } else {
     dedx = DEDX(material, tkin); 
   }
 
   if (cutEnergy < tmax) {
 
     G4double tau   = kineticEnergy/mass;
     G4double gam   = tau + 1.0;
     G4double bg2   = tau * (tau+2.0);
     G4double beta2 = bg2/(gam*gam);
     G4double x     = tmin/tmax;
 
     dedx += (G4Log(x) + (1.0 - x)*beta2) * twopi_mc2_rcl2
           * (material->GetElectronDensity())/beta2;
   }
 
   // now compute the total ionization loss
 
   if (dedx < 0.0) dedx = 0.0 ;
 
   dedx *= chargeSquare;
   /*
   G4cout << "Bragg: tkin(MeV) = " << tkin/MeV << " dedx(MeVxcm^2/g) = " 
          << dedx*gram/(MeV*cm2*material->GetDensity()) 
          << " q2 = " << chargeSquare <<  G4endl;
   */
   return dedx;
 }

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◆ CorrectionsAlongStep()

void G4BraggIonModel::CorrectionsAlongStep	(	const G4MaterialCutsCouple *	couple,
		const G4DynamicParticle *	dp,
		G4double &	eloss,
		G4double &	niel,
		G4double	length
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 278 of file G4BraggIonModel.cc.

 {
   // this method is called only for ions
   const G4ParticleDefinition* p = dp->GetDefinition();
   const G4Material* mat = couple->GetMaterial();
   G4double preKinEnergy = dp->GetKineticEnergy();
   G4double e = preKinEnergy - eloss*0.5;
   if(e < 0.0) { e = preKinEnergy*0.5; }
 
   G4double q2 = corr->EffectiveChargeSquareRatio(p,mat,e);
   GetModelOfFluctuations()->SetParticleAndCharge(p, q2);
   G4double qfactor = q2*corr->EffectiveChargeCorrection(p,mat,e)/corrFactor; 
   eloss *= qfactor; 
 
   //G4cout << "G4BraggIonModel::CorrectionsAlongStep e= " <<  e 
   //         << " qfactor= " << qfactor << " " << p->GetParticleName() <<G4endl;
 }

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◆ CrossSectionPerVolume()

G4double G4BraggIonModel::CrossSectionPerVolume	(	const G4Material *	material,
		const G4ParticleDefinition *	p,
		G4double	kineticEnergy,
		G4double	cutEnergy,
		G4double	maxEnergy
	)

virtual

Reimplemented from G4VEmModel.

Reimplemented in G4BraggNoDeltaModel.

Definition at line 220 of file G4BraggIonModel.cc.

 {
   G4double eDensity = material->GetElectronDensity();
   G4double cross = eDensity*ComputeCrossSectionPerElectron
                                          (p,kineticEnergy,cutEnergy,maxEnergy);
   return cross;
 }

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◆ DEDX()

G4double G4BraggIonModel::DEDX	(	const G4Material *	material,
		G4double	kineticEnergy
	)

private

Definition at line 643 of file G4BraggIonModel.cc.

 {
   G4double eloss = 0.0;
   // check DB
   if(material != currentMaterial) {
     currentMaterial = material;
     iASTAR    = -1;
     iMolecula = -1;
     if( !HasMaterial(material) ) { iASTAR = fASTAR->GetIndex(material); }
   }
 
   const G4int numberOfElements = material->GetNumberOfElements();
   const G4double* theAtomicNumDensityVector =
                                  material->GetAtomicNumDensityVector();
 
   if( iASTAR >= 0 ) {
     G4double T = kineticEnergy*rateMassHe2p;
     G4int zeff = G4lrint(material->GetTotNbOfElectPerVolume()/
                          material->GetTotNbOfAtomsPerVolume());
     return fASTAR->GetElectronicDEDX(iASTAR, T)*material->GetDensity()/
       HeEffChargeSquare(zeff, T/MeV);
 
   } else if(iMolecula >= 0) {
 
     eloss = StoppingPower(material, kineticEnergy)*
       material->GetDensity()/amu;
 
   // pure material
   } else if(1 == numberOfElements) {
 
     G4double z = material->GetZ();
     eloss = ElectronicStoppingPower(z, kineticEnergy)
                                * (material->GetTotNbOfAtomsPerVolume());
 
   // Brugg's rule calculation
   } else {
     const G4ElementVector* theElementVector =
                            material->GetElementVector() ;
 
     //  loop for the elements in the material
     for (G4int i=0; i<numberOfElements; i++)
     {
       const G4Element* element = (*theElementVector)[i] ;
       eloss   += ElectronicStoppingPower(element->GetZ(), kineticEnergy)
                                    * theAtomicNumDensityVector[i];
     }
   }
   return eloss*theZieglerFactor;
 }

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◆ ElectronicStoppingPower()

G4double G4BraggIonModel::ElectronicStoppingPower	(	G4double	z,
		G4double	kineticEnergy
	)		const

private

Definition at line 491 of file G4BraggIonModel.cc.

 {
   G4double ionloss ;
   G4int i = G4lrint(z)-1 ;  // index of atom
   if(i < 0)  i = 0 ;
   if(i > 91) i = 91 ;
 
   // The data and the fit from:
   // ICRU Report 49, 1993. Ziegler's type of parametrisations.
   // Proton kinetic energy for parametrisation (keV/amu)
 
    // He energy in internal units of parametrisation formula (MeV)
   G4double T = kineticEnergy*rateMassHe2p/MeV ;
 
   static const G4double a[92][5] = {
     {0.35485, 0.6456, 6.01525,  20.8933, 4.3515
    },{ 0.58,    0.59,   6.3,     130.0,   44.07
    },{ 1.42,    0.49,   12.25,    32.0,    9.161
    },{ 2.206,   0.51,   15.32,    0.25,    8.995 //Be Ziegler77
        // },{ 2.1895,  0.47183,7.2362,   134.30,  197.96 //Be from ICRU
    },{ 3.691,   0.4128, 18.48,    50.72,   9.0
    },{ 3.83523, 0.42993,12.6125,  227.41,  188.97
    },{ 1.9259,  0.5550, 27.15125, 26.0665, 6.2768
    },{ 2.81015, 0.4759, 50.0253,  10.556,  1.0382
    },{ 1.533,   0.531,  40.44,    18.41,   2.718
    },{ 2.303,   0.4861, 37.01,    37.96,   5.092
        // Z= 11-20
    },{ 9.894,   0.3081, 23.65,    0.384,   92.93
    },{ 4.3,     0.47,   34.3,     3.3,     12.74
    },{ 2.5,     0.625,  45.7,     0.1,     4.359
    },{ 2.1,     0.65,   49.34,    1.788,   4.133
    },{ 1.729,   0.6562, 53.41,    2.405,   3.845
    },{ 1.402,   0.6791, 58.98,    3.528,   3.211
    },{ 1.117,   0.7044, 69.69,    3.705,    2.156
    },{ 2.291,   0.6284, 73.88,    4.478,    2.066
    },{ 8.554,   0.3817, 83.61,    11.84,    1.875
    },{ 6.297,   0.4622, 65.39,    10.14,    5.036
        // Z= 21-30     
    },{ 5.307,   0.4918, 61.74,    12.4,    6.665
    },{ 4.71,    0.5087, 65.28,    8.806,    5.948
    },{ 6.151,   0.4524, 83.0,    18.31,    2.71
    },{ 6.57,    0.4322, 84.76,    15.53,    2.779
    },{ 5.738,   0.4492, 84.6,    14.18,    3.101
    },{ 5.013,   0.4707, 85.8,    16.55,    3.211
    },{ 4.32,    0.4947, 76.14,    10.85,    5.441
    },{ 4.652,   0.4571, 80.73,    22.0,    4.952
    },{ 3.114,   0.5236, 76.67,    7.62,    6.385
    },{ 3.114,   0.5236, 76.67,    7.62,    7.502
        // Z= 31-40
    },{ 3.114,   0.5236, 76.67,    7.62,    8.514
    },{ 5.746,   0.4662, 79.24,    1.185,    7.993
    },{ 2.792,   0.6346, 106.1,    0.2986,   2.331
    },{ 4.667,   0.5095, 124.3,    2.102,    1.667
    },{ 2.44,    0.6346, 105.0,    0.83,    2.851
    },{ 1.413,   0.7377, 147.9,    1.466,    1.016
    },{ 11.72,   0.3826, 102.8,    9.231,    4.371
    },{ 7.126,   0.4804, 119.3,    5.784,    2.454
    },{ 11.61,   0.3955, 146.7,    7.031,    1.423
    },{ 10.99,   0.41,   163.9,   7.1,      1.052
        // Z= 41-50
    },{ 9.241,   0.4275, 163.1,    7.954,    1.102
    },{ 9.276,   0.418,  157.1,   8.038,    1.29
    },{ 3.999,   0.6152, 97.6,    1.297,    5.792
    },{ 4.306,   0.5658, 97.99,    5.514,    5.754
    },{ 3.615,   0.6197, 86.26,    0.333,    8.689
    },{ 5.8,     0.49,   147.2,   6.903,    1.289
    },{ 5.6,     0.49,   130.0,   10.0,     2.844
    },{ 3.55,    0.6068, 124.7,    1.112,    3.119
    },{ 3.6,     0.62,   105.8,   0.1692,   6.026
    },{ 5.4,     0.53,   103.1,   3.931,    7.767
        // Z= 51-60
    },{ 3.97,    0.6459, 131.8,    0.2233,   2.723
    },{ 3.65,    0.64,   126.8,   0.6834,   3.411
    },{ 3.118,   0.6519, 164.9,    1.208,    1.51
    },{ 3.949,   0.6209, 200.5,    1.878,    0.9126
    },{ 14.4,    0.3923, 152.5,    8.354,    2.597
    },{ 10.99,   0.4599, 138.4,    4.811,    3.726
    },{ 16.6,    0.3773, 224.1,    6.28,    0.9121
    },{ 10.54,   0.4533, 159.3,   4.832,    2.529
    },{ 10.33,   0.4502, 162.0,   5.132,    2.444
    },{ 10.15,   0.4471, 165.6,   5.378,    2.328
        // Z= 61-70
    },{ 9.976,   0.4439, 168.0,   5.721,    2.258
    },{ 9.804,   0.4408, 176.2,   5.675,    1.997
    },{ 14.22,   0.363,  228.4,   7.024,    1.016
    },{ 9.952,   0.4318, 233.5,   5.065,    0.9244
    },{ 9.272,   0.4345, 210.0,   4.911,    1.258
    },{ 10.13,   0.4146, 225.7,   5.525,    1.055
    },{ 8.949,   0.4304, 213.3,   5.071,    1.221
    },{ 11.94,   0.3783, 247.2,   6.655,    0.849
    },{ 8.472,   0.4405, 195.5,   4.051,    1.604
    },{ 8.301,   0.4399, 203.7,   3.667,    1.459
        // Z= 71-80
    },{ 6.567,   0.4858, 193.0,   2.65,     1.66
    },{ 5.951,   0.5016, 196.1,   2.662,    1.589
    },{ 7.495,   0.4523, 251.4,   3.433,    0.8619
    },{ 6.335,   0.4825, 255.1,   2.834,    0.8228
    },{ 4.314,   0.5558, 214.8,   2.354,    1.263
    },{ 4.02,    0.5681, 219.9,   2.402,    1.191
    },{ 3.836,   0.5765, 210.2,   2.742,    1.305
    },{ 4.68,    0.5247, 244.7,   2.749,    0.8962
    },{ 2.892,   0.6204, 208.6,   2.415,    1.416 //Au Z77
        // },{ 3.223,   0.5883, 232.7,   2.954,    1.05  //Au ICRU
    },{ 2.892,   0.6204, 208.6,   2.415,    1.416
        // Z= 81-90
    },{ 4.728,   0.5522, 217.0,   3.091,    1.386
    },{ 6.18,    0.52,   170.0,   4.0,      3.224
    },{ 9.0,     0.47,   198.0,   3.8,      2.032
    },{ 2.324,   0.6997, 216.0,   1.599,    1.399
    },{ 1.961,   0.7286, 223.0,   1.621,    1.296
    },{ 1.75,    0.7427, 350.1,   0.9789,   0.5507
    },{ 10.31,   0.4613, 261.2,   4.738,    0.9899
    },{ 7.962,   0.519,  235.7,   4.347,    1.313
    },{ 6.227,   0.5645, 231.9,   3.961,    1.379
    },{ 5.246,   0.5947, 228.6,   4.027,    1.432
        // Z= 91-92
    },{ 5.408,   0.5811, 235.7,   3.961,    1.358
    },{ 5.218,   0.5828, 245.0,   3.838,    1.25}
   };
 
   // Free electron gas model
   if ( T < 0.001 ) {
     G4double slow  = a[i][0] ;
     G4double shigh = G4Log( 1.0 + a[i][3]*1000.0 + a[i][4]*0.001 )
                    * a[i][2]*1000.0 ;
     ionloss  = slow*shigh / (slow + shigh) ;
     ionloss *= sqrt(T*1000.0) ;
 
   // Main parametrisation
   } else {
     G4double slow  = a[i][0] * G4Exp(G4Log(T*1000.0)*a[i][1]) ;
     G4double shigh = G4Log( 1.0 + a[i][3]/T + a[i][4]*T ) * a[i][2]/T ;
     ionloss = slow*shigh / (slow + shigh) ;
     /*
     G4cout << "## " << i << ". T= " << T << " slow= " << slow
            << " a0= " << a[i][0] << " a1= " << a[i][1] 
            << " shigh= " << shigh 
            << " dedx= " << ionloss << " q^2= " <<  HeEffChargeSquare(z, T*MeV) 
            << G4endl;
     */
   }
   if ( ionloss < 0.0) { ionloss = 0.0; }
 
   // He effective charge
   ionloss /= HeEffChargeSquare(z, T);
 
   return ionloss;
 }

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◆ GetChargeSquareRatio()

G4double G4BraggIonModel::GetChargeSquareRatio	(	const G4ParticleDefinition *	p,
		const G4Material *	mat,
		G4double	kineticEnergy
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 152 of file G4BraggIonModel.cc.

 {
   //G4cout<<"G4BraggIonModel::GetChargeSquareRatio e= "<<kineticEnergy<<G4endl;
   // this method is called only for ions
   G4double q2 = corr->EffectiveChargeSquareRatio(p,mat,kineticEnergy);
   corrFactor  = q2*corr->EffectiveChargeCorrection(p,mat,kineticEnergy); 
   return corrFactor;
 }

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◆ GetParticleCharge()

G4double G4BraggIonModel::GetParticleCharge	(	const G4ParticleDefinition *	p,
		const G4Material *	mat,
		G4double	kineticEnergy
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 165 of file G4BraggIonModel.cc.

 {
   //G4cout<<"G4BraggIonModel::GetParticleCharge e= "<<kineticEnergy <<
   //  " q= " <<  corr->GetParticleCharge(p,mat,kineticEnergy) <<G4endl;
   // this method is called only for ions
   return corr->GetParticleCharge(p,mat,kineticEnergy);
 }

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◆ HasMaterial()

G4bool G4BraggIonModel::HasMaterial ( const G4Material * material )

private

Definition at line 392 of file G4BraggIonModel.cc.

 {
   return false;
   /*
   G4String chFormula = material->GetChemicalFormula();
   if("" == chFormula) { return false; }
 
   // ICRU Report N49, 1993. Ziegler model for He.
   
   static const size_t numberOfMolecula = 11;
   static const G4String molName[numberOfMolecula] = {
     "CaF_2",  "Cellulose_Nitrate",  "LiF", "Policarbonate",  
     "(C_2H_4)_N-Polyethylene",  "(C_2H_4)_N-Polymethly_Methacralate",
     "Polysterene", "SiO_2", "NaI", "H_2O",
     "Graphite" };
 
   // Search for the material in the table
   for (size_t i=0; i<numberOfMolecula; ++i) {
     if (chFormula == molName[i]) {
       iASTAR = fASTAR->GetIndex(matName[i]);  
       break;
     }
   }
   return (iASTAR >= 0);
   */
 }

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◆ HeEffChargeSquare()

G4double G4BraggIonModel::HeEffChargeSquare	(	G4double	z,
		G4double	kinEnergyInMeV
	)		const

private

Definition at line 696 of file G4BraggIonModel.cc.

 {
   // The aproximation of He effective charge from:
   // J.F.Ziegler, J.P. Biersack, U. Littmark
   // The Stopping and Range of Ions in Matter,
   // Vol.1, Pergamon Press, 1985
 
   static const G4double c[6] = {0.2865,  0.1266, -0.001429,
                                 0.02402,-0.01135, 0.001475};
 
   G4double e = std::max(0.0, G4Log(kinEnergyHeInMeV*massFactor));
   G4double x = c[0] ;
   G4double y = 1.0 ;
   for (G4int i=1; i<6; ++i) {
     y *= e ;
     x += y * c[i] ;
   }
 
   G4double w = 7.6 -  e ;
   w = 1.0 + (0.007 + 0.00005*z) * G4Exp( -w*w ) ;
   w = 4.0 * (1.0 - G4Exp(-x)) * w * w ;
 
   return w;
 }

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◆ Initialise()

void G4BraggIonModel::Initialise	(	const G4ParticleDefinition *	p,
		const G4DataVector &
	)

virtual

Implements G4VEmModel.

Definition at line 112 of file G4BraggIonModel.cc.

 {
   if(p != particle) { SetParticle(p); }
 
   corrFactor = chargeSquare;
 
   // always false before the run
   SetDeexcitationFlag(false);
 
   if(!isInitialised) {
     isInitialised = true;
 
     if(UseAngularGeneratorFlag() && !GetAngularDistribution()) {
       SetAngularDistribution(new G4DeltaAngle());
     }
     G4String pname = particle->GetParticleName();
     if(particle->GetParticleType() == "nucleus" &&
        pname != "deuteron" && pname != "triton" &&
        pname != "alpha+"   && pname != "helium" &&
        pname != "hydrogen") { isIon = true; }
 
     corr = G4LossTableManager::Instance()->EmCorrections();
 
     fParticleChange = GetParticleChangeForLoss();
     if(!fASTAR) { fASTAR = new G4ASTARStopping(); }
   }
   if(IsMaster() && particle->GetPDGMass() < GeV) { fASTAR->Initialise(); }
 }

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◆ MaxSecondaryEnergy()

G4double G4BraggIonModel::MaxSecondaryEnergy	(	const G4ParticleDefinition *	pd,
		G4double	kinEnergy
	)

protectedvirtual

Reimplemented from G4VEmModel.

Definition at line 380 of file G4BraggIonModel.cc.

 {
   if(pd != particle) { SetParticle(pd); }
   G4double tau  = kinEnergy/mass;
   G4double tmax = 2.0*electron_mass_c2*tau*(tau + 2.) /
                   (1. + 2.0*(tau + 1.)*ratio + ratio*ratio);
   return tmax;
 }

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◆ MinEnergyCut()

G4double G4BraggIonModel::MinEnergyCut	(	const G4ParticleDefinition *	,
		const G4MaterialCutsCouple *	couple
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 144 of file G4BraggIonModel.cc.

 {
   return couple->GetMaterial()->GetIonisation()->GetMeanExcitationEnergy();
 }

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◆ operator=()

G4BraggIonModel& G4BraggIonModel::operator= ( const G4BraggIonModel & right )

private

◆ SampleSecondaries()

void G4BraggIonModel::SampleSecondaries	(	std::vector< G4DynamicParticle >	vdp,
		const G4MaterialCutsCouple *	couple,
		const G4DynamicParticle *	dp,
		G4double	tmin,
		G4double	maxEnergy
	)

virtual

Implements G4VEmModel.

Definition at line 302 of file G4BraggIonModel.cc.

 {
   G4double tmax = MaxSecondaryKinEnergy(dp);
   G4double xmax = std::min(tmax, maxEnergy);
   if(xmin >= xmax) { return; }
 
   G4double kineticEnergy = dp->GetKineticEnergy();
   G4double energy  = kineticEnergy + mass;
   G4double energy2 = energy*energy;
   G4double beta2   = kineticEnergy*(kineticEnergy + 2.0*mass)/energy2;
   G4double grej    = 1.0;
   G4double deltaKinEnergy, f;
 
   CLHEP::HepRandomEngine* rndmEngineMod = G4Random::getTheEngine();
   G4double rndm[2];
 
   // sampling follows ...
   do {
     rndmEngineMod->flatArray(2, rndm);
     deltaKinEnergy = xmin*xmax/(xmin*(1.0 - rndm[0]) + xmax*rndm[0]);
 
     f = 1.0 - beta2*deltaKinEnergy/tmax;
 
     if(f > grej) {
         G4cout << "G4BraggIonModel::SampleSecondary Warning! "
                << "Majorant " << grej << " < "
                << f << " for e= " << deltaKinEnergy
                << G4endl;
     }
 
     // Loop checking, 03-Aug-2015, Vladimir Ivanchenko
   } while( grej*rndm[1] >= f );
 
   G4ThreeVector deltaDirection;
 
   if(UseAngularGeneratorFlag()) {
     const G4Material* mat =  couple->GetMaterial();
     G4int Z = SelectRandomAtomNumber(mat);
 
     deltaDirection = 
       GetAngularDistribution()->SampleDirection(dp, deltaKinEnergy, Z, mat);
 
   } else {
  
     G4double deltaMomentum =
       sqrt(deltaKinEnergy * (deltaKinEnergy + 2.0*electron_mass_c2));
     G4double cost = deltaKinEnergy * (energy + electron_mass_c2) /
       (deltaMomentum * dp->GetTotalMomentum());
     if(cost > 1.0) { cost = 1.0; }
     G4double sint = sqrt((1.0 - cost)*(1.0 + cost));
 
     G4double phi = twopi*rndmEngineMod->flat();
 
     deltaDirection.set(sint*cos(phi),sint*sin(phi), cost) ;
     deltaDirection.rotateUz(dp->GetMomentumDirection());
   }  
 
   // create G4DynamicParticle object for delta ray
   G4DynamicParticle* delta = 
     new G4DynamicParticle(theElectron,deltaDirection,deltaKinEnergy);
 
   vdp->push_back(delta);
 
   // Change kinematics of primary particle
   kineticEnergy -= deltaKinEnergy;
   G4ThreeVector finalP = dp->GetMomentum() - delta->GetMomentum();
   finalP               = finalP.unit();
 
   fParticleChange->SetProposedKineticEnergy(kineticEnergy);
   fParticleChange->SetProposedMomentumDirection(finalP);
 }

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◆ SetParticle()

void G4BraggIonModel::SetParticle ( const G4ParticleDefinition * p )

inlineprivate

Definition at line 184 of file G4BraggIonModel.hh.

 {
   particle = p;
   mass = particle->GetPDGMass();
   spin = particle->GetPDGSpin();
   G4double q   = particle->GetPDGCharge()/CLHEP::eplus;
   chargeSquare = q*q;
   massRate     = mass/CLHEP::proton_mass_c2;
   ratio        = CLHEP::electron_mass_c2/mass;
 }

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◆ StoppingPower()

G4double G4BraggIonModel::StoppingPower	(	const G4Material *	material,
		G4double	kineticEnergy
	)

private

Definition at line 421 of file G4BraggIonModel.cc.

 {
   G4double ionloss = 0.0 ;
 
   if (iMolecula >= 0) {
   
     // The data and the fit from: 
     // ICRU Report N49, 1993. Ziegler's model for alpha
     // He energy in internal units of parametrisation formula (MeV)
 
     G4double T = kineticEnergy*rateMassHe2p/MeV ;
 
     static const G4double a[11][5] = {
        {9.43672, 0.54398, 84.341, 1.3705, 57.422},
        {67.1503, 0.41409, 404.512, 148.97, 20.99},
        {5.11203, 0.453,  36.718,  50.6,  28.058}, 
        {61.793, 0.48445, 361.537, 57.889, 50.674},
        {7.83464, 0.49804, 160.452, 3.192, 0.71922},
        {19.729, 0.52153, 162.341, 58.35, 25.668}, 
        {26.4648, 0.50112, 188.913, 30.079, 16.509},
        {7.8655, 0.5205, 63.96, 51.32, 67.775},
        {8.8965, 0.5148, 339.36, 1.7205, 0.70423},
        {2.959, 0.53255, 34.247, 60.655, 15.153}, 
        {3.80133, 0.41590, 12.9966, 117.83, 242.28} };   
 
     static const G4double atomicWeight[11] = {
        101.96128, 44.0098, 16.0426, 28.0536, 42.0804,
        104.1512, 44.665, 60.0843, 18.0152, 18.0152, 12.0};       
 
     G4int i = iMolecula;
 
     // Free electron gas model
     if ( T < 0.001 ) {
       G4double slow  = a[i][0] ;
       G4double shigh = G4Log( 1.0 + a[i][3]*1000.0 + a[i][4]*0.001 )
          * a[i][2]*1000.0 ;
       ionloss  = slow*shigh / (slow + shigh) ;
       ionloss *= sqrt(T*1000.0) ;
 
       // Main parametrisation
     } else {
       G4double slow  = a[i][0] * G4Exp(G4Log(T*1000.0)*a[i][1]) ;
       G4double shigh = G4Log( 1.0 + a[i][3]/T + a[i][4]*T ) * a[i][2]/T ;
       ionloss = slow*shigh / (slow + shigh) ;
        /*
          G4cout << "## " << i << ". T= " << T << " slow= " << slow
          << " a0= " << a[i][0] << " a1= " << a[i][1] 
          << " shigh= " << shigh 
          << " dedx= " << ionloss << " q^2= " <<  HeEffChargeSquare(z, T*MeV)
          << G4endl;
        */
     }
     if ( ionloss < 0.0) ionloss = 0.0 ;
 
     // He effective charge
     G4double aa = atomicWeight[iMolecula];
     ionloss /= (HeEffChargeSquare(0.5*aa, T)*aa);
 
   // pure material (normally not the case for this function)
   } else if(1 == (material->GetNumberOfElements())) {
     G4double z = material->GetZ() ;
     ionloss = ElectronicStoppingPower( z, kineticEnergy ) ;  
   }
   
   return ionloss;
 }

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Member Data Documentation

◆ chargeSquare

G4double G4BraggIonModel::chargeSquare

private

Definition at line 166 of file G4BraggIonModel.hh.

◆ corr

G4EmCorrections* G4BraggIonModel::corr

private

Definition at line 154 of file G4BraggIonModel.hh.

◆ corrFactor

G4double G4BraggIonModel::corrFactor

private

Definition at line 172 of file G4BraggIonModel.hh.

◆ currentMaterial

const G4Material* G4BraggIonModel::currentMaterial

private

Definition at line 162 of file G4BraggIonModel.hh.

◆ fASTAR

G4ASTARStopping * G4BraggIonModel::fASTAR = nullptr

staticprivate

Definition at line 160 of file G4BraggIonModel.hh.

◆ fParticleChange

G4ParticleChangeForLoss* G4BraggIonModel::fParticleChange

private

Definition at line 158 of file G4BraggIonModel.hh.

◆ HeMass

G4double G4BraggIonModel::HeMass

private

Definition at line 170 of file G4BraggIonModel.hh.

◆ iASTAR

G4int G4BraggIonModel::iASTAR

private

Definition at line 177 of file G4BraggIonModel.hh.

◆ iMolecula

G4int G4BraggIonModel::iMolecula

private

Definition at line 176 of file G4BraggIonModel.hh.

◆ isInitialised

G4bool G4BraggIonModel::isInitialised

private

Definition at line 179 of file G4BraggIonModel.hh.

◆ isIon

G4bool G4BraggIonModel::isIon

private

Definition at line 178 of file G4BraggIonModel.hh.

◆ lowestKinEnergy

G4double G4BraggIonModel::lowestKinEnergy

private

Definition at line 169 of file G4BraggIonModel.hh.

◆ mass

G4double G4BraggIonModel::mass

private

Definition at line 164 of file G4BraggIonModel.hh.

◆ massFactor

G4double G4BraggIonModel::massFactor

private

Definition at line 171 of file G4BraggIonModel.hh.

◆ massRate

G4double G4BraggIonModel::massRate

private

Definition at line 167 of file G4BraggIonModel.hh.

◆ particle

const G4ParticleDefinition* G4BraggIonModel::particle

private

Definition at line 156 of file G4BraggIonModel.hh.

◆ rateMassHe2p

G4double G4BraggIonModel::rateMassHe2p

private

Definition at line 173 of file G4BraggIonModel.hh.

◆ ratio

G4double G4BraggIonModel::ratio

private

Definition at line 168 of file G4BraggIonModel.hh.

◆ spin

G4double G4BraggIonModel::spin

private

Definition at line 165 of file G4BraggIonModel.hh.

◆ theElectron

G4ParticleDefinition* G4BraggIonModel::theElectron

private

Definition at line 157 of file G4BraggIonModel.hh.

◆ theZieglerFactor

G4double G4BraggIonModel::theZieglerFactor

private

Definition at line 174 of file G4BraggIonModel.hh.

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

Public Member Functions

Protected Member Functions

Private Member Functions

Private Attributes

Static Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ G4BraggIonModel() [1/2]

◆ ~G4BraggIonModel()

◆ G4BraggIonModel() [2/2]

Member Function Documentation

◆ ComputeCrossSectionPerAtom()

◆ ComputeCrossSectionPerElectron()

◆ ComputeDEDXPerVolume()

◆ CorrectionsAlongStep()

◆ CrossSectionPerVolume()

◆ DEDX()

◆ ElectronicStoppingPower()

◆ GetChargeSquareRatio()

◆ GetParticleCharge()

◆ HasMaterial()

◆ HeEffChargeSquare()

◆ Initialise()

◆ MaxSecondaryEnergy()

◆ MinEnergyCut()

◆ operator=()

◆ SampleSecondaries()

◆ SetParticle()

◆ StoppingPower()

Member Data Documentation

◆ chargeSquare

◆ corr

◆ corrFactor

◆ currentMaterial

◆ fASTAR

◆ fParticleChange

◆ HeMass

◆ iASTAR

◆ iMolecula

◆ isInitialised

◆ isIon

◆ lowestKinEnergy

◆ mass

◆ massFactor

◆ massRate

◆ particle

◆ rateMassHe2p

◆ ratio

◆ spin

◆ theElectron

◆ theZieglerFactor