G4LCapture Class Reference

#include <G4LCapture.hh>

Inheritance diagram for G4LCapture:

Public Member Functions
	G4LCapture (const G4String &name="G4LCapture")
	~G4LCapture ()
G4HadFinalState *	ApplyYourself (const G4HadProjectile &aTrack, G4Nucleus &targetNucleus)
virtual void	ModelDescription (std::ostream &outFile) const
virtual const std::pair< G4double, G4double >	GetFatalEnergyCheckLevels () const
Public Member Functions inherited from G4HadronicInteraction
	G4HadronicInteraction (const G4String &modelName="HadronicModel")
virtual	~G4HadronicInteraction ()
virtual G4HadFinalState *	ApplyYourself (const G4HadProjectile &aTrack, G4Nucleus &targetNucleus)=0
virtual G4double	SampleInvariantT (const G4ParticleDefinition *p, G4double plab, G4int Z, G4int A)
virtual G4bool	IsApplicable (const G4HadProjectile &, G4Nucleus &)
G4double	GetMinEnergy () const
G4double	GetMinEnergy (const G4Material *aMaterial, const G4Element *anElement) const
void	SetMinEnergy (G4double anEnergy)
void	SetMinEnergy (G4double anEnergy, const G4Element *anElement)
void	SetMinEnergy (G4double anEnergy, const G4Material *aMaterial)
G4double	GetMaxEnergy () const
G4double	GetMaxEnergy (const G4Material *aMaterial, const G4Element *anElement) const
void	SetMaxEnergy (const G4double anEnergy)
void	SetMaxEnergy (G4double anEnergy, const G4Element *anElement)
void	SetMaxEnergy (G4double anEnergy, const G4Material *aMaterial)
const G4HadronicInteraction *	GetMyPointer () const
G4int	GetVerboseLevel () const
void	SetVerboseLevel (G4int value)
const G4String &	GetModelName () const
void	DeActivateFor (const G4Material *aMaterial)
void	ActivateFor (const G4Material *aMaterial)
void	DeActivateFor (const G4Element *anElement)
void	ActivateFor (const G4Element *anElement)
G4bool	IsBlocked (const G4Material *aMaterial) const
G4bool	IsBlocked (const G4Element *anElement) const
void	SetRecoilEnergyThreshold (G4double val)
G4double	GetRecoilEnergyThreshold () const
G4bool	operator== (const G4HadronicInteraction &right) const
G4bool	operator!= (const G4HadronicInteraction &right) const
virtual const std::pair< G4double, G4double >	GetFatalEnergyCheckLevels () const
virtual std::pair< G4double, G4double >	GetEnergyMomentumCheckLevels () const
void	SetEnergyMomentumCheckLevels (G4double relativeLevel, G4double absoluteLevel)
virtual void	ModelDescription (std::ostream &outFile) const

Additional Inherited Members
Protected Member Functions inherited from G4HadronicInteraction
void	SetModelName (const G4String &nam)
G4bool	IsBlocked () const
void	Block ()
Protected Attributes inherited from G4HadronicInteraction
G4HadFinalState	theParticleChange
G4int	verboseLevel
G4double	theMinEnergy
G4double	theMaxEnergy
G4bool	isBlocked

Detailed Description

Definition at line 67 of file G4LCapture.hh.

Constructor & Destructor Documentation

G4LCapture()

G4LCapture::G4LCapture

(

const G4String &

name = "G4LCapture"

)

Definition at line 51 of file G4LCapture.cc.

 : G4HadronicInteraction(name)
{   
  SetMinEnergy(0.0*GeV);
  SetMaxEnergy(DBL_MAX);
  // Description();
}

~G4LCapture()

G4LCapture::~G4LCapture

(

)

Definition at line 60 of file G4LCapture.cc.

{
  theParticleChange.Clear();
}

Member Function Documentation

ApplyYourself()

G4HadFinalState * G4LCapture::ApplyYourself ( const G4HadProjectile &  aTrack, G4Nucleus &  targetNucleus  )

virtual

Implements G4HadronicInteraction.

Definition at line 80 of file G4LCapture.cc.

{
  theParticleChange.Clear();
  theParticleChange.SetStatusChange(stopAndKill);
 
  G4double N = targetNucleus.GetA_asInt();
  G4double Z = targetNucleus.GetZ_asInt();
 
  const G4LorentzVector theMom = aTrack.Get4Momentum();
  G4double P = theMom.vect().mag()/GeV;
  G4double Px = theMom.vect().x()/GeV;
  G4double Py = theMom.vect().y()/GeV;
  G4double Pz = theMom.vect().z()/GeV;
  G4double E = theMom.e()/GeV;
  G4double E0 = aTrack.GetDefinition()->GetPDGMass()/GeV;
  G4double Q = aTrack.GetDefinition()->GetPDGCharge();
  if (verboseLevel > 1) {
    G4cout << "G4LCapture:ApplyYourself: incident particle:" << G4endl;
    G4cout << "P      " << P << " GeV/c" << G4endl;
    G4cout << "Px     " << Px << " GeV/c" << G4endl;
    G4cout << "Py     " << Py << " GeV/c" << G4endl;
    G4cout << "Pz     " << Pz << " GeV/c" << G4endl;
    G4cout << "E      " << E << " GeV" << G4endl;
    G4cout << "mass   " << E0 << " GeV" << G4endl;
    G4cout << "charge " << Q << G4endl;
  }
 
  // GHEISHA ADD operation to get total energy, mass, charge:
 
  if (verboseLevel > 1) {
    G4cout << "G4LCapture:ApplyYourself: material:" << G4endl;
    G4cout << "A      " << N << G4endl;
    G4cout << "Z   " << Z  << G4endl;
    G4cout << "atomic mass " << 
    Atomas(N, Z) << "GeV" << G4endl;
  }
  E = E + Atomas(N, Z);
  G4double E02 = E*E - P*P;
  E0 = std::sqrt(std::abs(E02));
  if (E02 < 0) E0 = -E0;
  Q = Q + Z;
  if (verboseLevel > 1) {
    G4cout << "G4LCapture:ApplyYourself: total:" << G4endl;
    G4cout << "E      " << E << " GeV" << G4endl;
    G4cout << "mass   " << E0 << " GeV" << G4endl;
    G4cout << "charge " << Q << G4endl;
  }
  Px = -Px;
  Py = -Py;
  Pz = -Pz;
 
  // Make a gamma...
 
  G4double p;
  if (Z == 1 && N == 1) { // special case for hydrogen
    p = 0.0022;
  } else {
    G4double ran = G4RandGauss::shoot();
    p = 0.0065 + ran*0.0010;
  }
 
  G4double ran1 = G4UniformRand();
  G4double ran2 = G4UniformRand();
  G4double cost = -1. + 2.*ran1;
  G4double sint = std::sqrt(std::abs(1. - cost*cost));
  G4double phi = ran2*twopi;
 
  G4double px = p*sint*std::sin(phi);
  G4double py = p*sint*std::cos(phi);
  G4double pz = p*cost;
  G4double e = p;
 
  G4double a = px*Px + py*Py + pz*Pz;
  a = (a/(E + E0) - e)/E0;
 
  px = px + a*Px;
  py = py + a*Py;
  pz = pz + a*Pz;
 
  G4DynamicParticle* aGamma;
  aGamma = new G4DynamicParticle(G4Gamma::GammaDefinition(),
                                 G4ThreeVector(px*GeV, py*GeV, pz*GeV));
  theParticleChange.AddSecondary(aGamma);
 
  // Make another gamma if there is sufficient energy left over...
 
  G4double xp = 0.008 - p;
  if (xp > 0.) {
    if (Z > 1 || N > 1) { 
      ran1 = G4UniformRand();
      ran2 = G4UniformRand();
      cost = -1. + 2.*ran1;
      sint = std::sqrt(std::abs(1. - cost*cost));
      phi = ran2*twopi;
 
      px = xp*sint*std::sin(phi);
      py = xp*sint*std::cos(phi);
      pz = xp*cost;
      e = xp;
 
      a = px*Px + py*Py + pz*Pz;
      a = (a/(E + E0) - e)/E0;
 
      px = px + a*Px;
      py = py + a*Py;
      pz = pz + a*Pz;
 
      aGamma = new G4DynamicParticle(G4Gamma::GammaDefinition(),
                                     G4ThreeVector(px*GeV, py*GeV, pz*GeV));
      theParticleChange.AddSecondary(aGamma);
    }
  }
  return &theParticleChange;
}

Referenced by G4NeutronHPorLCaptureModel::ApplyYourself().

GetFatalEnergyCheckLevels()

const std::pair< G4double, G4double > G4LCapture::GetFatalEnergyCheckLevels ( ) const

virtual

Reimplemented from G4HadronicInteraction.

Definition at line 195 of file G4LCapture.cc.

{
    // max energy non-conservation is mass of heavy nucleus
    return std::pair<G4double, G4double>(5*perCent,250*GeV);
}

ModelDescription()

void G4LCapture::ModelDescription ( std::ostream &  outFile ) const

virtual

Reimplemented from G4HadronicInteraction.

Definition at line 66 of file G4LCapture.cc.

{
  outFile << "G4LCapture is one of the Low Energy Parameterized\n"
          << "(LEP) models used to implement neutron capture on nuclei.\n"
          << "It is a re-engineered version of the GHEISHA code of\n"
          << "H. Fesefeldt which simply adds the neutron mass and energy\n"
          << "to the target nucleus, and emits gammas isotropically as\n"
          << "long as there is sufficient excitation energy in the\n"
          << "daughter nucleus.  The model is applicable to all incident\n"
          << "neutron energies.\n";
}

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

• G4LCapture.hh
• G4LCapture.cc