G4RToEConvForPositron Class Reference

#include <G4RToEConvForPositron.hh>

Inheritance diagram for G4RToEConvForPositron:

Collaboration diagram for G4RToEConvForPositron:

Public Member Functions
	G4RToEConvForPositron ()
virtual	~G4RToEConvForPositron ()
Public Member Functions inherited from G4VRangeToEnergyConverter
	G4VRangeToEnergyConverter ()
	G4VRangeToEnergyConverter (const G4VRangeToEnergyConverter &right)
G4VRangeToEnergyConverter &	operator= (const G4VRangeToEnergyConverter &right)
virtual	~G4VRangeToEnergyConverter ()
G4int	operator== (const G4VRangeToEnergyConverter &right) const
G4int	operator!= (const G4VRangeToEnergyConverter &right) const
virtual G4double	Convert (G4double rangeCut, const G4Material *material)
const G4ParticleDefinition *	GetParticleType () const
const G4PhysicsTable *	GetLossTable () const
virtual void	Reset ()
void	SetVerboseLevel (G4int value)
G4int	GetVerboseLevel () const

Protected Member Functions
virtual G4double	ComputeLoss (G4double AtomicNumber, G4double KineticEnergy)
Protected Member Functions inherited from G4VRangeToEnergyConverter
virtual void	BuildLossTable ()
virtual void	BuildRangeVector (const G4Material *aMaterial, G4RangeVector *rangeVector)
G4double	ConvertCutToKineticEnergy (G4RangeVector *theRangeVector, G4double theCutInLength, size_t materialIndex) const

Protected Attributes
G4double	Mass
G4double	Z
G4double	taul
G4double	ionpot
G4double	ionpotlog
G4double	bremfactor
Protected Attributes inherited from G4VRangeToEnergyConverter
G4double	fMaxEnergyCut
const G4ParticleDefinition *	theParticle
G4LossTable *	theLossTable
G4int	NumberOfElements
const G4int	TotBin
std::vector< G4RangeVector * >	fRangeVectorStore

Additional Inherited Members
Static Public Member Functions inherited from G4VRangeToEnergyConverter
static void	SetEnergyRange (G4double lowedge, G4double highedge)
static G4double	GetLowEdgeEnergy ()
static G4double	GetHighEdgeEnergy ()
static G4double	GetMaxEnergyCut ()
static void	SetMaxEnergyCut (G4double value)
Protected Types inherited from G4VRangeToEnergyConverter
typedef G4PhysicsTable	G4LossTable
typedef G4PhysicsLogVector	G4LossVector
typedef G4PhysicsLogVector	G4RangeVector
Static Protected Attributes inherited from G4VRangeToEnergyConverter
static G4double	LowestEnergy = 0.99e-3*MeV
static G4double	HighestEnergy = 100.0e6*MeV
static G4double	MaxEnergyCut = 10.0*GeV

Detailed Description

Definition at line 51 of file G4RToEConvForPositron.hh.

Constructor & Destructor Documentation

G4RToEConvForPositron::G4RToEConvForPositron

(

)

Definition at line 45 of file G4RToEConvForPositron.cc.

  : G4VRangeToEnergyConverter(),
    Mass(0.0),
    Z(-1.),  
    taul(0.0),
    ionpot(0.0),
    ionpotlog(-1.0e-10),
    bremfactor(0.1)
{    
  theParticle =  G4ParticleTable::GetParticleTable()->FindParticle("e+");
  if (theParticle ==0) {
#ifdef G4VERBOSE
    if (GetVerboseLevel()>0) {
      G4cout << " G4RToEConvForPositron::G4RToEConvForPositron() ";
      G4cout << " Positron is not defined !!" << G4endl;
    }
#endif
  } else {
    Mass = theParticle->GetPDGMass();
  }
}

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G4RToEConvForPositron::~G4RToEConvForPositron ( )

virtual

Definition at line 67 of file G4RToEConvForPositron.cc.

{ 
}

Member Function Documentation

G4double G4RToEConvForPositron::ComputeLoss ( G4double  AtomicNumber, G4double  KineticEnergy  )

protectedvirtual

Implements G4VRangeToEnergyConverter.

Definition at line 77 of file G4RToEConvForPositron.cc.

{
  const  G4double cbr1=0.02, cbr2=-5.7e-5, cbr3=1., cbr4=0.072;
  const  G4double Tlow=10.*keV, Thigh=1.*GeV;

  //  calculate dE/dx for electrons
  if( std::fabs(AtomicNumber-Z)>0.1 ) {
    Z = AtomicNumber;
    taul = Tlow/Mass;
    ionpot = 1.6e-5*MeV*std::exp(0.9*std::log(Z))/Mass;
    ionpotlog = std::log(ionpot);
  } 

  G4double tau = KineticEnergy/Mass;
  G4double dEdx;

 if(tau<taul)
  {
    G4double t1 = taul+1.;
    G4double t2 = taul+2.;
    G4double tsq = taul*taul;
    G4double beta2 = taul*t2/(t1*t1);
    G4double     f = 2.*std::log(taul)
                     -(6.*taul+1.5*tsq-taul*(1.-tsq/3.)/t2-tsq*(0.5-tsq/12.)/
                       (t2*t2))/(t1*t1);
    dEdx = (std::log(2.*taul+4.)-2.*ionpotlog+f)/beta2;
    dEdx = twopi_mc2_rcl2*Z*dEdx;
    G4double clow = dEdx*std::sqrt(taul);
    dEdx = clow/std::sqrt(KineticEnergy/Mass);

  } else {
   G4double t1 = tau+1.;
    G4double t2 = tau+2.;
    G4double tsq = tau*tau;
    G4double beta2 = tau*t2/(t1*t1);
    G4double f = 2.*std::log(tau)
                 - (6.*tau+1.5*tsq-tau*(1.-tsq/3.)/t2-tsq*(0.5-tsq/12.)/
                     (t2*t2))/(t1*t1);
    dEdx = (std::log(2.*tau+4.)-2.*ionpotlog+f)/beta2;
    dEdx = twopi_mc2_rcl2*Z*dEdx;

    // loss from bremsstrahlung follows
    G4double cbrem = (cbr1+cbr2*Z)
                       *(cbr3+cbr4*std::log(KineticEnergy/Thigh));
    cbrem = Z*(Z+1.)*cbrem*tau/beta2;
    cbrem *= bremfactor ;
    dEdx += twopi_mc2_rcl2*cbrem;
  }
  return dEdx;
}

Member Data Documentation

G4double G4RToEConvForPositron::bremfactor

protected

Definition at line 72 of file G4RToEConvForPositron.hh.

G4double G4RToEConvForPositron::ionpot

protected

Definition at line 70 of file G4RToEConvForPositron.hh.

G4double G4RToEConvForPositron::ionpotlog

protected

Definition at line 71 of file G4RToEConvForPositron.hh.

G4double G4RToEConvForPositron::Mass

protected

Definition at line 67 of file G4RToEConvForPositron.hh.

G4double G4RToEConvForPositron::taul

protected

Definition at line 69 of file G4RToEConvForPositron.hh.

G4double G4RToEConvForPositron::Z

protected

Definition at line 68 of file G4RToEConvForPositron.hh.

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

• geant4.10.03.p01/source/processes/cuts/include/G4RToEConvForPositron.hh
• geant4.10.03.p01/source/processes/cuts/src/G4RToEConvForPositron.cc