#include <G4RToEConvForGamma.hh>

Inheritance diagram for G4RToEConvForGamma:

Public Member Functions
	G4RToEConvForGamma ()

virtual	~G4RToEConvForGamma ()

Public Member Functions inherited from G4VRangeToEnergyConverter
	G4VRangeToEnergyConverter ()

virtual	~G4VRangeToEnergyConverter ()

	G4VRangeToEnergyConverter (const G4VRangeToEnergyConverter &r)=delete

G4VRangeToEnergyConverter &	operator= (const G4VRangeToEnergyConverter &r)=delete

G4bool	operator== (const G4VRangeToEnergyConverter &r) const =delete

G4bool	operator!= (const G4VRangeToEnergyConverter &r) const =delete

virtual G4double	Convert (const G4double rangeCut, const G4Material *material)

const G4ParticleDefinition *	GetParticleType () const

void	SetVerboseLevel (G4int value)

G4int	GetVerboseLevel () const

Protected Member Functions
G4double	ComputeValue (const G4int Z, const G4double kinEnergy) final

virtual G4double	ComputeValue (const G4int Z, const G4double kinEnergy)=0

Additional Inherited Members
Static Public Member Functions inherited from G4VRangeToEnergyConverter
static void	SetEnergyRange (const G4double lowedge, const G4double highedge)

static G4double	GetLowEdgeEnergy ()

static G4double	GetHighEdgeEnergy ()

static G4double	GetMaxEnergyCut ()

static void	SetMaxEnergyCut (const G4double value)

Protected Attributes inherited from G4VRangeToEnergyConverter
const G4ParticleDefinition *	theParticle = nullptr

G4int	fPDG = 0

Detailed Description

Definition at line 40 of file G4RToEConvForGamma.hh.

Constructor & Destructor Documentation

◆ G4RToEConvForGamma()

G4RToEConvForGamma::G4RToEConvForGamma ( )

explicit

Definition at line 40 of file G4RToEConvForGamma.cc.

  : G4VRangeToEnergyConverter()
{    
  theParticle = G4ParticleTable::GetParticleTable()->FindParticle("gamma");
  if (theParticle == nullptr)
  {
#ifdef G4VERBOSE
    if (GetVerboseLevel()>0)
    {
      G4cout << " G4RToEConvForGamma::G4RToEConvForGamma() - ";
      G4cout << "Gamma is not defined !!" << G4endl;
    }
#endif
  } 
  else
  {
    fPDG = theParticle->GetPDGEncoding();
  }
}

◆ ~G4RToEConvForGamma()

G4RToEConvForGamma::~G4RToEConvForGamma ( )

virtual

Definition at line 61 of file G4RToEConvForGamma.cc.

62{}

Member Function Documentation

◆ ComputeValue()

G4double G4RToEConvForGamma::ComputeValue	(	const G4int	Z,
		const G4double	kinEnergy
	)

finalprotectedvirtual

Implements G4VRangeToEnergyConverter.

Definition at line 65 of file G4RToEConvForGamma.cc.

{
  // Compute the "absorption" cross-section of the photon "absorption".
  // Cross-section means here the sum of the cross-sections of the
  // pair production, Compton scattering and photoelectric processes
 
  const G4double t1keV = 1.*CLHEP::keV;
  const G4double t200keV = 200.*CLHEP::keV;
  const G4double t100MeV = 100.*CLHEP::MeV;
 
  G4double Zsquare = Z*Z;
  G4double Zlog = G4Pow::GetInstance()->logZ(Z);
  G4double Zlogsquare = Zlog*Zlog;
 
  G4double tmin = (0.552+218.5/Z+557.17/Zsquare)*CLHEP::MeV;
  G4double tlow = 0.2*G4Exp(-7.355/std::sqrt(Z))*CLHEP::MeV;
 
  G4double smin = (0.01239+0.005585*Zlog-0.000923*Zlogsquare)*G4Exp(1.5*Zlog);
  G4double s200keV = (0.2651-0.1501*Zlog+0.02283*Zlogsquare)*Zsquare;
 
  G4double cminlog = G4Log(tmin/t200keV); 
  G4double cmin = G4Log(s200keV/smin)/(cminlog*cminlog);
 
  G4double slowlog = G4Log(t200keV/tlow);
  G4double slow = s200keV * G4Exp(0.042*Z*slowlog*slowlog);
  G4double logtlow = G4Log(tlow/t1keV);
  G4double clow = G4Log(300.*Zsquare/slow)/logtlow;
  G4double chigh = (7.55e-5 - 0.0542e-5*Z)*Zsquare*Z/G4Log(t100MeV/tmin);
 
  // Calculate the cross-section (using an approximate empirical formula)
  G4double xs;
  if ( energy < tlow )
  {
    xs = (energy < t1keV) ? slow*G4Exp(clow*logtlow) :
      slow*G4Exp(clow*G4Log(tlow/energy));
  }
  else if ( energy < t200keV )
  {
    G4double x = G4Log(t200keV/energy);
    xs = s200keV * G4Exp(0.042*Z*x*x);
  }
  else if( energy<tmin )
  {
    const G4double x = G4Log(tmin/energy);
    xs = smin * G4Exp(cmin*x*x);
  }
  else
  {
    xs = smin + chigh*G4Log(energy/tmin);
  }
  return xs * CLHEP::barn;
}

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

Public Member Functions