G4NeutronRadCapture Class Reference

#include <G4NeutronRadCapture.hh>

Inheritance diagram for G4NeutronRadCapture:

Public Member Functions
	G4NeutronRadCapture ()
virtual	~G4NeutronRadCapture ()
virtual G4HadFinalState *	ApplyYourself (const G4HadProjectile &aTrack, G4Nucleus &targetNucleus) final
virtual void	InitialiseModel () final
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	ModelDescription (std::ostream &outFile) const
virtual void	BuildPhysicsTable (const G4ParticleDefinition &)
	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 51 of file G4NeutronRadCapture.hh.

Constructor & Destructor Documentation

G4NeutronRadCapture()

G4NeutronRadCapture::G4NeutronRadCapture ( )

explicit

Definition at line 56 of file G4NeutronRadCapture.cc.

  : G4HadronicInteraction("nRadCapture"),
    photonEvaporation(nullptr),lab4mom(0.,0.,0.,0.)
{
  lowestEnergyLimit = 10*CLHEP::eV;
  minExcitation = 0.1*CLHEP::keV;
  SetMinEnergy( 0.0*CLHEP::GeV );
  SetMaxEnergy( G4HadronicParameters::Instance()->GetMaxEnergy() );
 
  electron = G4Electron::Electron();
  icID = -1;
  secID = -1;
  theTableOfIons = G4ParticleTable::GetParticleTable()->GetIonTable();
}

~G4NeutronRadCapture()

G4NeutronRadCapture::~G4NeutronRadCapture ( )

virtual

Definition at line 71 of file G4NeutronRadCapture.cc.

{
  delete photonEvaporation;
}

Member Function Documentation

ApplyYourself()

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

finalvirtual

Reimplemented from G4HadronicInteraction.

Definition at line 89 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);
    G4LorentzVector lv2(e1*G4RandomDirection(),e1);
    lv2.boost(bst);
    G4HadSecondary* news = 
      new G4HadSecondary(new G4DynamicParticle(G4Gamma::Gamma(), lv2));
    news->SetTime(time);
    news->SetCreatorModelID(secID);
    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,noFloat,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);
      news->SetCreatorModelID(secID);
      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 icID= " << icID << 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, noFloat, 0);
    /*  
    G4cout << "### NC 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);
      if(theDef == electron) { 
        news->SetCreatorModelID(icID); 
      } else {
        news->SetCreatorModelID(secID);
      }
      theParticleChange.AddSecondary(*news);
      delete news;
      delete f;
    }
    delete fv;
  }
  //G4cout << "Capture done" << G4endl;
  return &theParticleChange;
}

InitialiseModel()

void G4NeutronRadCapture::InitialiseModel ( )

finalvirtual

Reimplemented from G4HadronicInteraction.

Definition at line 76 of file G4NeutronRadCapture.cc.

{
  if(photonEvaporation != nullptr) { return; }
  G4DeexPrecoParameters* param = 
    G4NuclearLevelData::GetInstance()->GetParameters();
  minExcitation = param->GetMinExcitation();
  icID =  G4PhysicsModelCatalog::GetModelID("model_e-InternalConversion");
  secID = G4PhysicsModelCatalog::GetModelID("model_" + GetModelName());
  photonEvaporation = new G4PhotonEvaporation();
  photonEvaporation->Initialise();
  photonEvaporation->SetICM(true);
}

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

• G4NeutronRadCapture.hh
• G4NeutronRadCapture.cc