G4NeutronRadCapture Class Reference

#include <G4NeutronRadCapture.hh>

Inheritance diagram for G4NeutronRadCapture:

Collaboration diagram for G4NeutronRadCapture:

Public Member Functions
	G4NeutronRadCapture ()
virtual	~G4NeutronRadCapture ()
G4HadFinalState *	ApplyYourself (const G4HadProjectile &aTrack, G4Nucleus &targetNucleus)
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 &, 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
virtual G4int	GetVerboseLevel () const
virtual 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
virtual void	BuildPhysicsTable (const G4ParticleDefinition &)

Private Member Functions
G4NeutronRadCapture &	operator= (const G4NeutronRadCapture &right)
	G4NeutronRadCapture (const G4NeutronRadCapture &)

Private Attributes
G4double	lowestEnergyLimit
G4double	minExcitation
G4VEvaporationChannel *	photonEvaporation
G4IonTable *	theTableOfIons
G4LorentzVector	lab4mom

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 52 of file G4NeutronRadCapture.hh.

Constructor & Destructor Documentation

G4NeutronRadCapture() [1/2]

G4NeutronRadCapture::G4NeutronRadCapture

(

)

Definition at line 54 of file G4NeutronRadCapture.cc.

  : G4HadronicInteraction("nRadCapture"),
    lab4mom(0.,0.,0.,0.)
{
  lowestEnergyLimit = 10*eV;
  minExcitation = 1*keV;
  SetMinEnergy( 0.0*GeV );
  SetMaxEnergy( 100.*TeV );

  char* env = getenv("G4UsePhotonEvaporationOLD"); 
  if(!env) { photonEvaporation = new G4PhotonEvaporation(); } 
  else     { photonEvaporation = new G4PhotonEvaporationOLD(); }
  photonEvaporation->SetICM(true);
 
  theTableOfIons = G4ParticleTable::GetParticleTable()->GetIonTable();
}

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~G4NeutronRadCapture()

G4NeutronRadCapture::~G4NeutronRadCapture ( )

virtual

Definition at line 71 of file G4NeutronRadCapture.cc.

{
  delete photonEvaporation;
}

G4NeutronRadCapture() [2/2]

G4NeutronRadCapture::G4NeutronRadCapture ( const G4NeutronRadCapture &  )

private

Member Function Documentation

ApplyYourself()

G4HadFinalState * G4NeutronRadCapture::ApplyYourself ( const G4HadProjectile &  aTrack, G4Nucleus &  targetNucleus  )

virtual

Implements G4HadronicInteraction.

Definition at line 76 of file G4NeutronRadCapture.cc.

{
  theParticleChange.Clear();
  theParticleChange.SetStatusChange(stopAndKill);

  G4int A = theNucleus.GetA_asInt();
  G4int Z = theNucleus.GetZ_asInt();

  G4double time = aTrack.GetGlobalTime();

  // Create initial state
  lab4mom.set(0.,0.,0.,G4NucleiProperties::GetNuclearMass(A, Z));
  lab4mom += aTrack.Get4Momentum();

  G4double M  = lab4mom.mag();
  ++A;
  G4double mass = G4NucleiProperties::GetNuclearMass(A, Z);
  //G4cout << "Capture start: Z= " << Z << " A= " << A 
  //     << " LabM= " << M << " Mcompound= " << mass << G4endl;

  // simplified method of 1 gamma emission
  if(A <= 4) {

    G4ThreeVector bst = lab4mom.boostVector();

    if(M - mass <= lowestEnergyLimit) {
      return &theParticleChange;
    }
 
    if (verboseLevel > 1) {
      G4cout << "G4NeutronRadCapture::DoIt: Eini(MeV)=" 
         << aTrack.GetKineticEnergy()/MeV << "  Eexc(MeV)= " 
         << (M - mass)/MeV 
         << "  Z= " << Z << "  A= " << A << G4endl;
    }
    G4double e1 = (M - mass)*(M + mass)/(2*M);

    G4double cost = 2.0*G4UniformRand() - 1.0;
    if(cost > 1.0) {cost = 1.0;}
    else if(cost < -1.0) {cost = -1.0;}
    G4double sint = std::sqrt((1. - cost)*(1.0 + cost));
    G4double phi  = G4UniformRand()*CLHEP::twopi;

    G4LorentzVector lv2(e1*sint*std::cos(phi),e1*sint*std::sin(phi),
            e1*cost,e1);
    lv2.boost(bst);
    G4HadSecondary* news = 
      new G4HadSecondary(new G4DynamicParticle(G4Gamma::Gamma(), lv2));
    news->SetTime(time);
    theParticleChange.AddSecondary(*news);
    delete news;

    const G4ParticleDefinition* theDef = 0;

    lab4mom -= lv2; 
    if      (Z == 1 && A == 2) {theDef = G4Deuteron::Deuteron();}
    else if (Z == 1 && A == 3) {theDef = G4Triton::Triton();}
    else if (Z == 2 && A == 3) {theDef = G4He3::He3();}
    else if (Z == 2 && A == 4) {theDef = G4Alpha::Alpha();}
    else {  theDef = theTableOfIons->GetIon(Z,A,0.0); }

    if (verboseLevel > 1) {
      G4cout << "Gamma 4-mom: " << lv2 << "   " 
         << theDef->GetParticleName() << "   " << lab4mom << G4endl;
    }
    if(theDef) {
      news = new G4HadSecondary(new G4DynamicParticle(theDef, lab4mom));
      news->SetTime(time);
      theParticleChange.AddSecondary(*news);
      delete news;
    }
 
  // Use photon evaporation  
  } else {
 
    // protection against wrong kinematic 
    if(M < mass) {
      G4double etot = std::max(mass, lab4mom.e());
      G4double ptot = std::sqrt((etot - mass)*(etot + mass));
      G4ThreeVector v = lab4mom.vect().unit();
      lab4mom.set(v.x()*ptot,v.y()*ptot,v.z()*ptot,etot);
    }

    G4Fragment* aFragment = new G4Fragment(A, Z, lab4mom);

    if (verboseLevel > 1) {
      G4cout << "G4NeutronRadCapture::ApplyYourself initial G4Fragmet:" 
         << G4endl;
      G4cout << aFragment << G4endl;
    }

    //
    // Sample final state
    //
    G4FragmentVector* fv = photonEvaporation->BreakUpFragment(aFragment);
    if(!fv) { fv = new G4FragmentVector(); }
    fv->push_back(aFragment);
    size_t n = fv->size();

    if (verboseLevel > 1) {
      G4cout << "G4NeutronRadCapture: " << n << " final particle" << G4endl;
    }
    for(size_t i=0; i<n; ++i) {

      G4Fragment* f = (*fv)[i];    
      G4double etot = f->GetMomentum().e();

      Z = f->GetZ_asInt();
      A = f->GetA_asInt();

      const G4ParticleDefinition* theDef;
      if(0 == Z && 0 == A) {theDef =  f->GetParticleDefinition();}
      else if (Z == 1 && A == 2) {theDef = G4Deuteron::Deuteron();}
      else if (Z == 1 && A == 3) {theDef = G4Triton::Triton();}
      else if (Z == 2 && A == 3) {theDef = G4He3::He3();}
      else if (Z == 2 && A == 4) {theDef = G4Alpha::Alpha();}
      else {
        G4double eexc = f->GetExcitationEnergy();
    if(eexc <= minExcitation) { eexc = 0.0; }
    theDef = theTableOfIons->GetIon(Z, A, eexc);
    /*
    G4cout << "### Find ion Z= " << Z << " A= " << A
           << " Eexc(MeV)= " << eexc/MeV << "  " 
           << theDef << G4endl;
    */
      }
      G4double ekin = std::max(0.0,etot - theDef->GetPDGMass());
      if (verboseLevel > 1) {
    G4cout << i << ". " << theDef->GetParticleName()
           << " Ekin(MeV)= " << etot/MeV
           << " p: " << f->GetMomentum().vect() 
           << G4endl;
      }
      G4HadSecondary* news = new G4HadSecondary(
    new G4DynamicParticle(theDef,
                  f->GetMomentum().vect().unit(),
                  ekin));
      G4double timeF = f->GetCreationTime();
      if(timeF < 0.0) { timeF = 0.0; }
      news->SetTime(time + timeF);
      theParticleChange.AddSecondary(*news);
      delete news;
      delete f;
    }
    delete fv;
  }
  return &theParticleChange;
}

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operator=()

G4NeutronRadCapture& G4NeutronRadCapture::operator= ( const G4NeutronRadCapture &  right )

private

Member Data Documentation

lab4mom

G4LorentzVector G4NeutronRadCapture::lab4mom

private

Definition at line 72 of file G4NeutronRadCapture.hh.

lowestEnergyLimit

G4double G4NeutronRadCapture::lowestEnergyLimit

private

Definition at line 68 of file G4NeutronRadCapture.hh.

minExcitation

G4double G4NeutronRadCapture::minExcitation

private

Definition at line 69 of file G4NeutronRadCapture.hh.

photonEvaporation

G4VEvaporationChannel* G4NeutronRadCapture::photonEvaporation

private

Definition at line 70 of file G4NeutronRadCapture.hh.

theTableOfIons

G4IonTable* G4NeutronRadCapture::theTableOfIons

private

Definition at line 71 of file G4NeutronRadCapture.hh.

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

• G4NeutronRadCapture.hh
• G4NeutronRadCapture.cc