G4DecayProducts Class Reference

#include <G4DecayProducts.hh>

Public Types
typedef std::vector < G4DynamicParticle * >	G4DecayProductVector

Public Member Functions
	G4DecayProducts ()
	G4DecayProducts (const G4DynamicParticle &aParticle)
	G4DecayProducts (const G4DecayProducts &right)
G4DecayProducts &	operator= (const G4DecayProducts &right)
	~G4DecayProducts ()
G4int	operator== (const G4DecayProducts &right) const
G4int	operator!= (const G4DecayProducts &right) const
const G4DynamicParticle *	GetParentParticle () const
void	SetParentParticle (const G4DynamicParticle &aParticle)
void	Boost (G4double totalEnergy, const G4ThreeVector &momentumDirection)
void	Boost (G4double betax, G4double betay, G4double betaz)
G4DynamicParticle *	PopProducts ()
G4int	PushProducts (G4DynamicParticle *aParticle)
G4DynamicParticle *	operator[] (G4int anIndex) const
G4int	entries () const
G4bool	IsChecked () const
void	DumpInfo () const

Protected Types
enum	{ MaxNumberOfProducts = 64 }

Detailed Description

Definition at line 47 of file G4DecayProducts.hh.

Member Typedef Documentation

typedef std::vector<G4DynamicParticle*> G4DecayProducts::G4DecayProductVector

Definition at line 94 of file G4DecayProducts.hh.

Member Enumeration Documentation

anonymous enum

protected

Enumerator
MaxNumberOfProducts

Definition at line 96 of file G4DecayProducts.hh.

{MaxNumberOfProducts = 64};

Constructor & Destructor Documentation

G4DecayProducts::G4DecayProducts

(

)

Definition at line 50 of file G4DecayProducts.cc.

                :numberOfProducts(0),theParentParticle(0)
{ 
   theProductVector = new G4DecayProductVector();
}

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G4DecayProducts::G4DecayProducts

(

const G4DynamicParticle &

aParticle

)

Definition at line 56 of file G4DecayProducts.cc.

  :numberOfProducts(0),theParentParticle(0)
{
  theParentParticle = new G4DynamicParticle(aParticle);
  theProductVector = new G4DecayProductVector();
}

G4DecayProducts::G4DecayProducts

(

const G4DecayProducts &

right

)

Definition at line 63 of file G4DecayProducts.cc.

                :numberOfProducts(0)
{
  theProductVector = new G4DecayProductVector();

  // copy parent (Deep Copy)
  theParentParticle = new G4DynamicParticle(*right.theParentParticle);

  //copy daughters (Deep Copy)
  for (G4int index=0; index < right.numberOfProducts; index++) {
    G4DynamicParticle* daughter = right.theProductVector->at(index);
    G4DynamicParticle* pDaughter =  new G4DynamicParticle(*daughter);

    G4double properTime = daughter->GetPreAssignedDecayProperTime();
    if(properTime>0.0)pDaughter->SetPreAssignedDecayProperTime(properTime); 

    const G4DecayProducts* pPreAssigned = daughter->GetPreAssignedDecayProducts();
    if (pPreAssigned) {
      G4DecayProducts* pPA = new G4DecayProducts(*pPreAssigned);
      pDaughter->SetPreAssignedDecayProducts(pPA);
    }

    theProductVector->push_back( pDaughter );
  }
  numberOfProducts = right.numberOfProducts;
}

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G4DecayProducts::~G4DecayProducts

(

)

Definition at line 127 of file G4DecayProducts.cc.

{
  //delete parent
  if (theParentParticle != 0) delete theParentParticle;
  
  // delete G4DynamicParticle object
  for (G4int index=0; index < numberOfProducts; index++) {
      delete theProductVector->at(index);
  }
  theProductVector->clear();
  numberOfProducts = 0;    
  delete theProductVector;
}

Member Function Documentation

void G4DecayProducts::Boost	(	G4double	totalEnergy,
		const G4ThreeVector &	momentumDirection
	)

Definition at line 176 of file G4DecayProducts.cc.

{
  // calcurate new beta
  G4double   mass = theParentParticle->GetMass();
  G4double   totalMomentum(0);
  if (totalEnergy > mass ) totalMomentum  = std::sqrt( (totalEnergy - mass)*(totalEnergy + mass) );
  G4double   betax = momentumDirection.x()*totalMomentum/totalEnergy;  
  G4double   betay = momentumDirection.y()*totalMomentum/totalEnergy;  
  G4double   betaz = momentumDirection.z()*totalMomentum/totalEnergy;  
  this->Boost(betax, betay, betaz);
}

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void G4DecayProducts::Boost	(	G4double	betax,
		G4double	betay,
		G4double	betaz
	)

Definition at line 188 of file G4DecayProducts.cc.

{ 
  G4double   mass = theParentParticle->GetMass();
  G4double   energy  = theParentParticle->GetTotalEnergy();
  G4double   momentum  = 0.0;

  G4ThreeVector direction(0.0,0.0,1.0);    
  G4LorentzVector p4;

  if (energy - mass > DBL_MIN) {
    // calcurate  beta of initial state
    momentum  = theParentParticle->GetTotalMomentum();
    direction = theParentParticle->GetMomentumDirection();
    G4double betax = -1.0*direction.x()*momentum/energy;  
    G4double betay = -1.0*direction.y()*momentum/energy;  
    G4double betaz = -1.0*direction.z()*momentum/energy;  
    
    for (G4int index=0; index < numberOfProducts; index++) {
       // make G4LorentzVector for secondaries
       p4 = (theProductVector->at(index))->Get4Momentum();

       // boost secondaries to theParentParticle's rest frame 
       p4.boost(betax, betay, betaz);

       // boost secondaries to  new frame 
       p4.boost(newbetax, newbetay, newbetaz);

       // change energy/momentum
       (theProductVector->at(index))->Set4Momentum(p4);
     }
   } else {
     for (G4int index=0; index < numberOfProducts; index++) {
       // make G4LorentzVector for secondaries
       p4 = (theProductVector->at(index))->Get4Momentum();

       // boost secondaries to  new frame 
       p4.boost(newbetax, newbetay, newbetaz);

       // change energy/momentum
       (theProductVector->at(index))->Set4Momentum(p4);
      }
   }
   // make G4LorentzVector for parent in its rest frame
   mass = theParentParticle->GetMass();
   G4LorentzVector parent4( 0.0, 0.0, 0.0, mass);

   // boost parent to new frame 
   parent4.boost(newbetax, newbetay, newbetaz);

   // change energy/momentum
   theParentParticle->Set4Momentum(parent4);
}

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void G4DecayProducts::DumpInfo

(

)

const

Definition at line 311 of file G4DecayProducts.cc.

{
   G4cout << " ----- List of DecayProducts  -----" << G4endl;
   G4cout << " ------ Parent Particle ----------" << G4endl;
   if (theParentParticle != 0) theParentParticle->DumpInfo();
   G4cout << " ------ Daughter Particles  ------" << G4endl;  
   for (G4int index=0; index < numberOfProducts; index++) 
   {
      G4cout << " ----------" << index+1 << " -------------" << G4endl;  
      (theProductVector->at(index))-> DumpInfo();
   }
   G4cout << " ----- End List of DecayProducts  -----" << G4endl;
   G4cout << G4endl;
} 

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G4int G4DecayProducts::entries ( ) const

inline

Definition at line 86 of file G4DecayProducts.hh.

{return numberOfProducts;};

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const G4DynamicParticle* G4DecayProducts::GetParentParticle ( ) const

inline

Definition at line 73 of file G4DecayProducts.hh.

{return theParentParticle;};

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G4bool G4DecayProducts::IsChecked

(

)

const

Definition at line 241 of file G4DecayProducts.cc.

{
  G4bool returnValue = true;
  // check parent 
  //   energy/momentum
  G4double   parent_energy  = theParentParticle->GetTotalEnergy();
  G4ThreeVector direction = theParentParticle->GetMomentumDirection();
  G4ThreeVector parent_momentum = direction*(theParentParticle->GetTotalMomentum());
  // check momentum dirction is a unit vector
  if ( (parent_momentum.mag() >0.0) && (std::fabs(direction.mag()-1.0) >1.0e-6 ) ) {
#ifdef G4VERBOSE
    G4cout << "G4DecayProducts::IsChecked()::  "
           << " Momentum Direction Vector of Parent is not normalized "
           << "  (=" << direction.mag() << ")" << G4endl;
#endif
    returnValue = false;
    parent_momentum = parent_momentum * (1./direction.mag());
  }

  //daughters
  G4double   mass, energy;
  G4ThreeVector momentum;
  G4double   total_energy = parent_energy;
  G4ThreeVector total_momentum =  parent_momentum;
  for (G4int index=0; index < numberOfProducts; index++) 
  {
    G4DynamicParticle* part = theProductVector->at(index);
    mass = part->GetMass();
    energy  = part->GetTotalEnergy();
    direction = part->GetMomentumDirection();
    momentum = direction*(part->GetTotalMomentum());
    // check momentum dirction is a unit vector
    if ( (momentum.mag()>0.0) && (std::fabs(direction.mag()-1.0) > 1.0e-6)) {
#ifdef G4VERBOSE
      G4cout <<  "G4DecayProducts::IsChecked()::  "
             << " Momentum Direction Vector of Daughter [" << index
             << "]  is not normalized (=" << direction.mag() << ")" << G4endl;
#endif
      returnValue = false;
      momentum = momentum * (1./direction.mag());
    }
    // whether daughter stops or not
    if (energy - mass < DBL_MIN ) {
#ifdef G4VERBOSE
      G4cout <<  "G4DecayProducts::IsChecked()::  "
             << "  Daughter [" << index << "] has no kinetic energy "<< G4endl;
#endif
      returnValue = false;
    }
    total_energy -= energy; 
    total_momentum -= momentum;
  }
  // check energy/momentum conservation
  if ( (std::fabs(total_energy) >1.0e-9*MeV) || (total_momentum.mag() >1.0e-9*MeV ) ){ 
#ifdef G4VERBOSE
    G4cout <<  "G4DecayProducts::IsChecked()::  "
           << " Energy/Momentum is not conserved   "<< G4endl;
    G4cout << " difference between parent energy and sum of dughters' energy : " 
       << total_energy /MeV << "[MeV]  " << G4endl; 
    G4cout << " difference between parent momentum and sum of dughters' momentum : " 
       << " x:" << total_momentum.getX()/MeV 
       << " y:" << total_momentum.getY()/MeV  
       << " z:" << total_momentum.getZ()/MeV  
       << G4endl;
#endif
    returnValue = false;
  }
  return returnValue;
}

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G4int G4DecayProducts::operator!= ( const G4DecayProducts &  right ) const

inline

Definition at line 116 of file G4DecayProducts.hh.

{
  return (this != (G4DecayProducts *) &right);
}

G4DecayProducts & G4DecayProducts::operator=

(

const G4DecayProducts &

right

)

Definition at line 90 of file G4DecayProducts.cc.

{
  G4int index;

  if (this != &right)
  { 
    // recreate parent
    if (theParentParticle != 0) delete theParentParticle;
    theParentParticle = new G4DynamicParticle(*right.theParentParticle);

    // delete G4DynamicParticle objects
    for (index=0; index < numberOfProducts; index++) {
      delete theProductVector->at(index);
    }
    theProductVector->clear();

    //copy daughters (Deep Copy)
    for (index=0; index < right.numberOfProducts; index++) {
      G4DynamicParticle* daughter = right.theProductVector->at(index);
      G4DynamicParticle* pDaughter =  new G4DynamicParticle(*daughter);

      G4double properTime = daughter->GetPreAssignedDecayProperTime();
      if(properTime>0.0) pDaughter->SetPreAssignedDecayProperTime(properTime); 
      
      const G4DecayProducts* pPreAssigned = daughter->GetPreAssignedDecayProducts();
      if (pPreAssigned) {
    G4DecayProducts* pPA = new G4DecayProducts(*pPreAssigned);
    pDaughter->SetPreAssignedDecayProducts(pPA);
      }
      theProductVector->push_back( pDaughter );
    } 
    numberOfProducts = right.numberOfProducts;
    
  }
  return *this;
}

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G4int G4DecayProducts::operator== ( const G4DecayProducts &  right ) const

inline

Definition at line 110 of file G4DecayProducts.hh.

{
  return (this == (G4DecayProducts *) &right);
}

G4DynamicParticle * G4DecayProducts::operator[]

(

G4int

anIndex

)

const

Definition at line 160 of file G4DecayProducts.cc.

{
   if ((numberOfProducts > anIndex) && (anIndex >=0) ) {
     return  theProductVector->at(anIndex);
   } else {
     return 0;
   }
}

G4DynamicParticle * G4DecayProducts::PopProducts

(

)

Definition at line 141 of file G4DecayProducts.cc.

{
   if ( numberOfProducts >0 ) {
     numberOfProducts -= 1;   
     G4DynamicParticle* part = theProductVector->back();
     theProductVector->pop_back();
     return part;
   } else {
     return 0;
   }
}

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G4int G4DecayProducts::PushProducts

(

G4DynamicParticle *

aParticle

)

Definition at line 153 of file G4DecayProducts.cc.

{
  theProductVector->push_back(aParticle);
  numberOfProducts += 1; 
  return numberOfProducts;
}

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void G4DecayProducts::SetParentParticle

(

const G4DynamicParticle &

aParticle

)

Definition at line 169 of file G4DecayProducts.cc.

{
  if (theParentParticle != 0) delete theParentParticle;
  theParentParticle = new G4DynamicParticle(aParticle);
}

---

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

• source/geant4.10.03.p02/source/particles/management/include/G4DecayProducts.hh
• source/geant4.10.03.p02/source/particles/management/src/G4DecayProducts.cc