#include <G4PreCompoundModel.hh>

Inheritance diagram for G4PreCompoundModel:

Public Member Functions
	G4PreCompoundModel (G4ExcitationHandler *ptr=0)

virtual	~G4PreCompoundModel ()

virtual G4HadFinalState *	ApplyYourself (const G4HadProjectile &thePrimary, G4Nucleus &theNucleus)

virtual G4ReactionProductVector *	DeExcite (G4Fragment &aFragment)

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

void	UseHETCEmission ()

void	UseDefaultEmission ()

void	UseGNASHTransition ()

void	UseDefaultTransition ()

void	SetOPTxs (G4int opt)

void	UseSICB ()

void	UseNGB ()

void	UseSCO ()

void	UseCEMtr ()

Public Member Functions inherited from G4VPreCompoundModel
	G4VPreCompoundModel (G4ExcitationHandler *ptr=0, const G4String &modelName="PrecompoundModel")

virtual	~G4VPreCompoundModel ()

virtual G4HadFinalState *	ApplyYourself (const G4HadProjectile &thePrimary, G4Nucleus &theNucleus)=0

virtual G4ReactionProductVector *	DeExcite (G4Fragment &aFragment)=0

void	SetExcitationHandler (G4ExcitationHandler *ptr)

G4ExcitationHandler *	GetExcitationHandler () 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 64 of file G4PreCompoundModel.hh.

Constructor & Destructor Documentation

◆ G4PreCompoundModel()

G4PreCompoundModel::G4PreCompoundModel ( G4ExcitationHandler * ptr = 0 )

Definition at line 66 of file G4PreCompoundModel.cc.

  : G4VPreCompoundModel(ptr,"PRECO"), useHETCEmission(false), 
    useGNASHTransition(false), OPTxs(3), useSICB(false), 
    useNGB(false), useSCO(false), useCEMtr(true), maxZ(3), maxA(5) 
                      //maxZ(9), maxA(17)
{
  if(!ptr) { SetExcitationHandler(new G4ExcitationHandler()); }
  theParameters = G4PreCompoundParameters::GetAddress();
 
  theEmission = new G4PreCompoundEmission();
  if(useHETCEmission) { theEmission->SetHETCModel(); }
  else { theEmission->SetDefaultModel(); }
  theEmission->SetOPTxs(OPTxs);
  theEmission->UseSICB(useSICB);
 
  if(useGNASHTransition) { theTransition = new G4GNASHTransitions; }
  else { theTransition = new G4PreCompoundTransitions(); }
  theTransition->UseNGB(useNGB);
  theTransition->UseCEMtr(useCEMtr);
 
  proton = G4Proton::Proton();
  neutron = G4Neutron::Neutron();
}

◆ ~G4PreCompoundModel()

G4PreCompoundModel::~G4PreCompoundModel ( )

virtual

Definition at line 90 of file G4PreCompoundModel.cc.

{
  delete theEmission;
  delete theTransition;
  delete GetExcitationHandler();
}

Member Function Documentation

◆ ApplyYourself()

G4HadFinalState * G4PreCompoundModel::ApplyYourself	(	const G4HadProjectile &	thePrimary,
		G4Nucleus &	theNucleus
	)

virtual

Implements G4VPreCompoundModel.

Definition at line 121 of file G4PreCompoundModel.cc.

{  
  const G4ParticleDefinition* primary = thePrimary.GetDefinition();
  if(primary != neutron && primary != proton) {
    std::ostringstream errOs;
    errOs << "BAD primary type in G4PreCompoundModel: " 
      << primary->GetParticleName() <<G4endl;
    throw G4HadronicException(__FILE__, __LINE__, errOs.str());
  }
 
  G4int Zp = 0;
  G4int Ap = 1;
  if(primary == proton) { Zp = 1; }
 
  G4int A = theNucleus.GetA_asInt();
  G4int Z = theNucleus.GetZ_asInt();
   
  //G4cout << "### G4PreCompoundModel::ApplyYourself: A= " << A << " Z= " << Z
  //     << " Ap= " << Ap << " Zp= " << Zp << G4endl; 
  // 4-Momentum
  G4LorentzVector p = thePrimary.Get4Momentum();
  G4double mass = G4NucleiProperties::GetNuclearMass(A, Z);
  p += G4LorentzVector(0.0,0.0,0.0,mass);
  //G4cout << "Primary 4-mom " << p << "  mass= " << mass << G4endl;
 
  // prepare fragment
  G4Fragment anInitialState(A + Ap, Z + Zp, p);
 
  // projectile and target nucleons
  // Add nucleon on which interaction happens
  //++Ap;
  //if(A*G4UniformRand() <= G4double(Z)) { Zp += 1; }
  anInitialState.SetNumberOfExcitedParticle(2, 1);
  anInitialState.SetNumberOfHoles(1,0);
  //  anInitialState.SetNumberOfExcitedParticle(Ap, Zp);
  // anInitialState.SetNumberOfHoles(Ap,Zp);
 
  anInitialState.SetCreationTime(thePrimary.GetGlobalTime());
  
  // call excitation handler
  G4ReactionProductVector * result = DeExcite(anInitialState);
 
  // fill particle change
  theResult.Clear();
  theResult.SetStatusChange(stopAndKill);
  for(G4ReactionProductVector::iterator i= result->begin(); i != result->end(); ++i)
    {
      G4DynamicParticle * aNew = 
    new G4DynamicParticle((*i)->GetDefinition(),
                  (*i)->GetTotalEnergy(),
                  (*i)->GetMomentum());
      delete (*i);
      theResult.AddSecondary(aNew);
    }
  delete result;
  
  //return the filled particle change
  return &theResult;
}

◆ DeExcite()

G4ReactionProductVector * G4PreCompoundModel::DeExcite ( G4Fragment & aFragment )

virtual

Implements G4VPreCompoundModel.

Definition at line 184 of file G4PreCompoundModel.cc.

{
  G4ReactionProductVector * Result = new G4ReactionProductVector;
  G4double Eex = aFragment.GetExcitationEnergy();
  G4int Z = aFragment.GetZ_asInt(); 
  G4int A = aFragment.GetA_asInt(); 
 
  //G4cout << "### G4PreCompoundModel::DeExcite" << G4endl;
  //G4cout << aFragment << G4endl;
 
  // Perform Equilibrium Emission 
  if ((Z < maxZ && A < maxA) || Eex < MeV /*|| Eex > 3.*MeV*A*/) {
    PerformEquilibriumEmission(aFragment, Result);
    return Result;
  }
  
  // main loop  
  for (;;) {
    
    //fragment++;
    //G4cout<<"-------------------------------------------------------------------"<<G4endl;
    //G4cout<<"Fragment number .. "<<fragment<<G4endl;
    
    // Initialize fragment according with the nucleus parameters
    //G4cout << "### Loop over fragment" << G4endl;
    //G4cout << aFragment << G4endl;
 
    theEmission->Initialize(aFragment);
    
    G4double gg = (6.0/pi2)*aFragment.GetA_asInt()*theParameters->GetLevelDensity();
    
    G4int EquilibriumExcitonNumber = 
      G4lrint(std::sqrt(2*gg*aFragment.GetExcitationEnergy()));
    //   
    //    G4cout<<"Neq="<<EquilibriumExcitonNumber<<G4endl;
    //
    // J. M. Quesada (Jan. 08)  equilibrium hole number could be used as preeq.
    // evap. delimiter (IAEA report)
    
    // Loop for transitions, it is performed while there are preequilibrium transitions.
    G4bool ThereIsTransition = false;
    
    //        G4cout<<"----------------------------------------"<<G4endl;
    //        G4double NP=aFragment.GetNumberOfParticles();
    //        G4double NH=aFragment.GetNumberOfHoles();
    //        G4double NE=aFragment.GetNumberOfExcitons();
    //        G4cout<<" Ex. Energy="<<aFragment.GetExcitationEnergy()<<G4endl;
    //        G4cout<<"N. excitons="<<NE<<"  N. Part="<<NP<<"N. Holes ="<<NH<<G4endl;
    //G4int transition=0;
    do {
      //transition++;
      //G4cout<<"transition number .."<<transition<<G4endl;
      //G4cout<<" n ="<<aFragment.GetNumberOfExcitons()<<G4endl;
      G4bool go_ahead = false;
      // soft cutoff criterium as an "ad-hoc" solution to force increase in  evaporation  
      G4int test = aFragment.GetNumberOfExcitons();
      if (test <= EquilibriumExcitonNumber) { go_ahead=true; }
 
      //J. M. Quesada (Apr. 08): soft-cutoff switched off by default
      if (useSCO && !go_ahead)
    {
      G4double x = G4double(test)/G4double(EquilibriumExcitonNumber) - 1;
      if( G4UniformRand() < 1.0 -  std::exp(-x*x/0.32) ) { go_ahead = true; }
    } 
        
      // JMQ: WARNING:  CalculateProbability MUST be called prior to Get methods !! 
      // (O values would be returned otherwise)
      G4double TotalTransitionProbability = 
    theTransition->CalculateProbability(aFragment);
      G4double P1 = theTransition->GetTransitionProb1();
      G4double P2 = theTransition->GetTransitionProb2();
      G4double P3 = theTransition->GetTransitionProb3();
      //G4cout<<"#0 P1="<<P1<<" P2="<<P2<<"  P3="<<P3<<G4endl;
      
      //J.M. Quesada (May 2008) Physical criterium (lamdas)  PREVAILS over 
      //                        approximation (critical exciton number)
      //V.Ivanchenko (May 2011) added check on number of nucleons
      //                        to send a fragment to FermiBreakUp
      if(!go_ahead || P1 <= P2+P3 || 
     (aFragment.GetZ_asInt() < maxZ && aFragment.GetA_asInt() < maxA) )        
    {
      //G4cout<<"#4 EquilibriumEmission"<<G4endl; 
      PerformEquilibriumEmission(aFragment,Result);
      return Result;
    }
      else 
    {
      G4double TotalEmissionProbability = 
        theEmission->GetTotalProbability(aFragment);
      //
      //G4cout<<"#1 TotalEmissionProbability="<<TotalEmissionProbability<<" Nex= " 
      //    <<aFragment.GetNumberOfExcitons()<<G4endl;
      //
      // Check if number of excitons is greater than 0
      // else perform equilibrium emission
      if (aFragment.GetNumberOfExcitons() <= 0) 
        {
          PerformEquilibriumEmission(aFragment,Result);
          return Result;
        }
        
      //J.M.Quesada (May 08) this has already been done in order to decide  
      //                     what to do (preeq-eq) 
      // Sum of all probabilities
      G4double TotalProbability = TotalEmissionProbability 
        + TotalTransitionProbability;
            
      // Select subprocess
      if (TotalProbability*G4UniformRand() > TotalEmissionProbability) 
        {
          //G4cout<<"#2 Transition"<<G4endl; 
          // It will be transition to state with a new number of excitons
          ThereIsTransition = true;     
          // Perform the transition
          theTransition->PerformTransition(aFragment);
        } 
      else 
        {
          //G4cout<<"#3 Emission"<<G4endl; 
          // It will be fragment emission
          ThereIsTransition = false;
          Result->push_back(theEmission->PerformEmission(aFragment));
        }
    }
    } while (ThereIsTransition);   // end of do loop
  } // end of for (;;) loop
  return Result;
}

Referenced by G4LowEIonFragmentation::ApplyYourself(), and ApplyYourself().

◆ ModelDescription()

void G4PreCompoundModel::ModelDescription ( std::ostream & outFile ) const

virtual

Reimplemented from G4HadronicInteraction.

Definition at line 97 of file G4PreCompoundModel.cc.

{
    outFile << "The GEANT4 precompound model is considered as an extension of the\n"
        <<  "hadron kinetic model. It gives a possibility to extend the low energy range\n"
        <<  "of the hadron kinetic model for nucleon-nucleus inelastic collision and it \n"
        <<  "provides a ”smooth” transition from kinetic stage of reaction described by the\n"
        <<  "hadron kinetic model to the equilibrium stage of reaction described by the\n"
        <<  "equilibrium deexcitation models.\n"
        <<  "The initial information for calculation of pre-compound nuclear stage\n"
        <<  "consists of the atomic mass number A, charge Z of residual nucleus, its\n"
        <<  "four momentum P0 , excitation energy U and number of excitons n, which equals\n"
        <<  "the sum of the number of particles p (from them p_Z are charged) and the number of\n"
        <<  "holes h.\n"
        <<  "At the preequilibrium stage of reaction, we follow the exciton model approach in ref. [1],\n"
        <<  "taking into account the competition among all possible nuclear transitions\n"
        <<  "with ∆n = +2, −2, 0 (which are deﬁned by their associated transition probabilities) and\n"
        <<  "the emission of neutrons, protons, deutrons, thritium and helium nuclei (also defined by\n"
        <<  "their associated emission  probabilities according to exciton model)\n"
        <<  "\n"
        <<  "[1] K.K. Gudima, S.G. Mashnik, V.D. Toneev, Nucl. Phys. A401 329 (1983)\n"
        << std::endl;
}

◆ SetOPTxs()

void G4PreCompoundModel::SetOPTxs ( G4int opt )

Definition at line 345 of file G4PreCompoundModel.cc.

{ 
  OPTxs = opt; 
  theEmission->SetOPTxs(OPTxs);
}

◆ UseCEMtr()

void G4PreCompoundModel::UseCEMtr ( )

Definition at line 367 of file G4PreCompoundModel.cc.

{ 
  useCEMtr = true; 
}

◆ UseDefaultEmission()

void G4PreCompoundModel::UseDefaultEmission ( )

Definition at line 323 of file G4PreCompoundModel.cc.

{ 
  useHETCEmission = false; 
  theEmission->SetDefaultModel();
}

◆ UseDefaultTransition()

void G4PreCompoundModel::UseDefaultTransition ( )

Definition at line 337 of file G4PreCompoundModel.cc.

                                              { 
  useGNASHTransition = false; 
  delete theTransition;
  theTransition = new G4PreCompoundTransitions();
  theTransition->UseNGB(useNGB);
  theTransition->UseCEMtr(useCEMtr);
}

◆ UseGNASHTransition()

void G4PreCompoundModel::UseGNASHTransition ( )

Definition at line 329 of file G4PreCompoundModel.cc.

                                            { 
  useGNASHTransition = true; 
  delete theTransition;
  theTransition = new G4GNASHTransitions;
  theTransition->UseNGB(useNGB);
  theTransition->UseCEMtr(useCEMtr);
}

◆ UseHETCEmission()

void G4PreCompoundModel::UseHETCEmission ( )

Definition at line 317 of file G4PreCompoundModel.cc.

{ 
  useHETCEmission = true; 
  theEmission->SetHETCModel();
}

◆ UseNGB()

void G4PreCompoundModel::UseNGB ( )

Definition at line 357 of file G4PreCompoundModel.cc.

{ 
  useNGB = true; 
}

◆ UseSCO()

void G4PreCompoundModel::UseSCO ( )

Definition at line 362 of file G4PreCompoundModel.cc.

{ 
  useSCO = true; 
}

◆ UseSICB()

void G4PreCompoundModel::UseSICB ( )

Definition at line 351 of file G4PreCompoundModel.cc.

{ 
  useSICB = true; 
  theEmission->UseSICB(useSICB);
}

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

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ G4PreCompoundModel()

◆ ~G4PreCompoundModel()

Member Function Documentation

◆ ApplyYourself()

◆ DeExcite()

◆ ModelDescription()

◆ SetOPTxs()

◆ UseCEMtr()

◆ UseDefaultEmission()

◆ UseDefaultTransition()

◆ UseGNASHTransition()

◆ UseHETCEmission()

◆ UseNGB()

◆ UseSCO()

◆ UseSICB()