G4EmCaptureCascade Class Reference

#include <G4EmCaptureCascade.hh>

Inheritance diagram for G4EmCaptureCascade:

Public Member Functions
	G4EmCaptureCascade ()
virtual	~G4EmCaptureCascade ()
virtual G4HadFinalState *	ApplyYourself (const G4HadProjectile &aTrack, G4Nucleus &targetNucleus)
virtual void	ModelDescription (std::ostream &outFile) const
Public Member Functions inherited from G4HadronicInteraction
	G4HadronicInteraction (const G4String &modelName="HadronicModel")
virtual	~G4HadronicInteraction ()
virtual G4double	SampleInvariantT (const G4ParticleDefinition *p, G4double plab, G4int Z, G4int A)
virtual G4bool	IsApplicable (const G4HadProjectile &aTrack, G4Nucleus &targetNucleus)
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)
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
virtual const std::pair< G4double, G4double >	GetFatalEnergyCheckLevels () const
virtual std::pair< G4double, G4double >	GetEnergyMomentumCheckLevels () const
void	SetEnergyMomentumCheckLevels (G4double relativeLevel, G4double absoluteLevel)
virtual void	BuildPhysicsTable (const G4ParticleDefinition &)
virtual void	InitialiseModel ()
	G4HadronicInteraction (const G4HadronicInteraction &right)=delete
const G4HadronicInteraction &	operator= (const G4HadronicInteraction &right)=delete
G4bool	operator== (const G4HadronicInteraction &right) const =delete
G4bool	operator!= (const G4HadronicInteraction &right) const =delete

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 66 of file G4EmCaptureCascade.hh.

Constructor & Destructor Documentation

G4EmCaptureCascade()

G4EmCaptureCascade::G4EmCaptureCascade ( )

explicit

Definition at line 55 of file G4EmCaptureCascade.cc.

  : G4HadronicInteraction("emCaptureCascade")
{ 
  theElectron = G4Electron::Electron();
  theGamma = G4Gamma::Gamma();
  fMuMass = G4MuonMinus::MuonMinus()->GetPDGMass();
  fTime = 0.0;
 
  // Calculate the Energy of K Mesoatom Level for this Element using
  // the Energy of Hydrogen Atom taken into account finite size of the
  // nucleus 
  static const G4int nlevels = 28;
  static const G4int listK[nlevels] = {
      1, 2,  4,  6,  8, 11, 14, 17, 18, 21, 24,
     26, 29, 32, 38, 40, 41, 44, 49, 53, 55,
     60, 65, 70, 75, 81, 85, 92};
  static const G4double listKEnergy[nlevels] = {
     0.00275, 0.011, 0.043, 0.098, 0.173, 0.326,
     0.524, 0.765, 0.853, 1.146, 1.472,
     1.708, 2.081, 2.475, 3.323, 3.627, 
     3.779, 4.237, 5.016, 5.647, 5.966,
     6.793, 7.602, 8.421, 9.249, 10.222,
    10.923,11.984};
 
  fKLevelEnergy[0] = 0.0;
  fKLevelEnergy[1] = listKEnergy[0];
  G4int idx = 1;
  for(G4int i=1; i<nlevels; ++i) {
    G4int z1 = listK[idx];
    G4int z2 = listK[i];
    if(z1+1 < z2) {
      G4double dz = G4double(z2 - z1);
      G4double y1 = listKEnergy[idx]/G4double(z1*z1);
      G4double y2 = listKEnergy[i]/G4double(z2*z2);
      for(G4int z=z1+1; z<z2; ++z) {
        fKLevelEnergy[z] = (y1 + (y2 - y1)*(z - z1)/dz)*z*z;
      }
    }
    fKLevelEnergy[z2] = listKEnergy[i];
    idx = i;  
  }
  for(G4int i = 0; i<14; ++i) { fLevelEnergy[i] = 0.0; }
}

~G4EmCaptureCascade()

G4EmCaptureCascade::~G4EmCaptureCascade ( )

virtual

Definition at line 101 of file G4EmCaptureCascade.cc.

{}

Member Function Documentation

ApplyYourself()

G4HadFinalState * G4EmCaptureCascade::ApplyYourself ( const G4HadProjectile & aTrack, G4Nucleus & targetNucleus )

virtual

Reimplemented from G4HadronicInteraction.

Definition at line 107 of file G4EmCaptureCascade.cc.

{
  result.Clear();
  result.SetStatusChange(isAlive);
  fTime = projectile.GetGlobalTime();
 
  G4int Z = targetNucleus.GetZ_asInt(); 
  G4int A = targetNucleus.GetA_asInt(); 
  G4double massA = G4NucleiProperties::GetNuclearMass(A, Z);
  G4double mass = fMuMass * massA / (fMuMass + massA) ;
  G4double e = 13.6 * eV * (Z * Z) * mass/ electron_mass_c2;
 
  // precise corrections of energy only for K-shell
  fLevelEnergy[0] = fKLevelEnergy[std::min(Z, 92)];
  for(G4int i=1; i<14; ++i) {
    fLevelEnergy[i] = e/(G4double)((i+1)*(i+1));
  }
 
  G4int nElec  = Z;
  G4int nAuger = 1;
  G4int nLevel = 13;
  G4double pGamma = (Z*Z*Z*Z);
 
  // Capture on 14-th level
  G4double edep = fLevelEnergy[13];
  AddNewParticle(theElectron,edep);
  G4double deltaE;
 
  // Emit new photon or electron
  // Simplified model for probabilities
  // N.C.Mukhopadhyay Phy. Rep. 30 (1977) 1.
  do {
 
    // case of Auger electrons
    if((nAuger < nElec) && ((pGamma + 10000.0) * G4UniformRand() < 10000.0) ) {
      ++nAuger;
      deltaE =  fLevelEnergy[nLevel-1] -  fLevelEnergy[nLevel];
      --nLevel;
      AddNewParticle(theElectron, deltaE);
 
    } else {
 
      // Case of photon cascade, probabilities from
      // C.S.Wu and L.Wilets, Ann. Rev. Nuclear Sci. 19 (1969) 527.
 
      G4double var = (10.0 + G4double(nLevel - 1) ) * G4UniformRand();
      G4int iLevel = nLevel - 1 ;
      if(var > 10.0) iLevel -= G4int(var-10.0) + 1;
      if( iLevel < 0 ) iLevel = 0;
      deltaE =  fLevelEnergy[iLevel] -  fLevelEnergy[nLevel];
      nLevel = iLevel;
      AddNewParticle(theGamma, deltaE);
    }
    edep += deltaE;
 
    // Loop checking, 06-Aug-2015, Vladimir Ivanchenko
  } while( nLevel > 0 );
 
  result.SetLocalEnergyDeposit(edep);
  return &result;
}

ModelDescription()

void G4EmCaptureCascade::ModelDescription ( std::ostream & outFile ) const

virtual

Reimplemented from G4HadronicInteraction.

Definition at line 172 of file G4EmCaptureCascade.cc.

{
  outFile << "Simulation of electromagnetic cascade from capture level"
      << " to K-shell of the mesonic atom\n."
      << "Probabilities of gamma and Auger transitions from\n"
      << "  N.C.Mukhopadhyay Phys. Rep. 30 (1977) 1.\n";
}

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

• G4EmCaptureCascade.hh
• G4EmCaptureCascade.cc