G4LEAntiNeutronInelastic Class Reference

#include <G4LEAntiNeutronInelastic.hh>

Inheritance diagram for G4LEAntiNeutronInelastic:

Public Member Functions
	G4LEAntiNeutronInelastic (const G4String &name="G4LEAntiNeutronInelastic")
	~G4LEAntiNeutronInelastic ()
G4HadFinalState *	ApplyYourself (const G4HadProjectile &aTrack, G4Nucleus &targetNucleus)
virtual void	ModelDescription (std::ostream &outFile) const

---

Detailed Description

Definition at line 46 of file G4LEAntiNeutronInelastic.hh.

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Constructor & Destructor Documentation

G4LEAntiNeutronInelastic::G4LEAntiNeutronInelastic

(

const G4String &

name = "G4LEAntiNeutronInelastic"

)

Definition at line 42 of file G4LEAntiNeutronInelastic.cc.

References G4cout, G4endl, G4HadronicInteraction::SetMaxEnergy(), and G4HadronicInteraction::SetMinEnergy().

 :G4InelasticInteraction(name)
{
  SetMinEnergy(0.0);
  SetMaxEnergy(25.*GeV);
  G4cout << "WARNING: model G4LEAntiNeutronInelastic is being deprecated and will\n"
         << "disappear in Geant4 version 10.0"  << G4endl;
}

G4LEAntiNeutronInelastic::~G4LEAntiNeutronInelastic

(

)

[inline]

Definition at line 52 of file G4LEAntiNeutronInelastic.hh.

{}

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Member Function Documentation

G4HadFinalState * G4LEAntiNeutronInelastic::ApplyYourself	(	const G4HadProjectile &	aTrack,
		G4Nucleus &	targetNucleus
	)			[virtual]

Implements G4HadronicInteraction.

Definition at line 67 of file G4LEAntiNeutronInelastic.cc.

References G4InelasticInteraction::CalculateMomenta(), G4Nucleus::Cinema(), G4InelasticInteraction::DoIsotopeCounting(), G4Nucleus::EvaporationEffects(), G4cout, G4endl, G4UniformRand, G4HadProjectile::GetDefinition(), G4DynamicParticle::GetDefinition(), G4ReactionProduct::GetKineticEnergy(), G4HadProjectile::GetKineticEnergy(), G4HadProjectile::GetMaterial(), G4ReactionProduct::GetMomentum(), G4Material::GetName(), G4ParticleDefinition::GetParticleName(), G4ParticleDefinition::GetPDGMass(), G4ReactionProduct::GetTotalMomentum(), G4FastVector< Type, N >::Initialize(), G4InelasticInteraction::isotopeProduction, G4InuclParticleNames::pp, G4Nucleus::ReturnTargetParticle(), G4ReactionProduct::SetKineticEnergy(), G4ReactionProduct::SetMomentum(), G4ReactionProduct::SetSide(), G4InelasticInteraction::SetUpChange(), G4HadronicInteraction::theParticleChange, and G4HadronicInteraction::verboseLevel.

{ 
  const G4HadProjectile* originalIncident = &aTrack;

  // create the target particle
  G4DynamicParticle* originalTarget = targetNucleus.ReturnTargetParticle();
    
  if (verboseLevel > 1) {
    const G4Material *targetMaterial = aTrack.GetMaterial();
    G4cout << "G4LEAntiNeutronInelastic::ApplyYourself called" << G4endl;
    G4cout << "kinetic energy = " << originalIncident->GetKineticEnergy()/MeV << "MeV, ";
    G4cout << "target material = " << targetMaterial->GetName() << ", ";
    G4cout << "target particle = " << originalTarget->GetDefinition()->GetParticleName()
           << G4endl;
  }

  // Fermi motion and evaporation
  // As of Geant3, the Fermi energy calculation had not been Done
  G4double ek = originalIncident->GetKineticEnergy()/MeV;
  G4double amas = originalIncident->GetDefinition()->GetPDGMass()/MeV;
  G4ReactionProduct modifiedOriginal;
  modifiedOriginal = *originalIncident;
    
  G4double tkin = targetNucleus.Cinema(ek);
  ek += tkin;
  modifiedOriginal.SetKineticEnergy(ek*MeV);
  G4double et = ek + amas;
  G4double p = std::sqrt( std::abs((et-amas)*(et+amas)) );
  G4double pp = modifiedOriginal.GetMomentum().mag()/MeV;
  if (pp > 0.0) {
    G4ThreeVector momentum = modifiedOriginal.GetMomentum();
    modifiedOriginal.SetMomentum( momentum * (p/pp) );
  }

  // calculate black track energies
  tkin = targetNucleus.EvaporationEffects(ek);
  ek -= tkin;
  modifiedOriginal.SetKineticEnergy(ek*MeV);
  et = ek + amas;
  p = std::sqrt( std::abs((et-amas)*(et+amas)) );
  pp = modifiedOriginal.GetMomentum().mag()/MeV;
  if (pp > 0.0) {
    G4ThreeVector momentum = modifiedOriginal.GetMomentum();
    modifiedOriginal.SetMomentum( momentum * (p/pp) );
  }
    
  G4ReactionProduct currentParticle = modifiedOriginal;
  G4ReactionProduct targetParticle;
  targetParticle = *originalTarget;
  currentParticle.SetSide(1); // incident always goes in forward hemisphere
  targetParticle.SetSide(-1);  // target always goes in backward hemisphere
  G4bool incidentHasChanged = false;
  G4bool targetHasChanged = false;
  G4bool quasiElastic = false;
  G4FastVector<G4ReactionProduct,GHADLISTSIZE> vec;  // vec will contain the secondary particles
  G4int vecLen = 0;
  vec.Initialize(0);
    
  const G4double cutOff = 0.1*MeV;
  const G4double anni = std::min(1.3*currentParticle.GetTotalMomentum()/GeV, 0.4);
    
  if ((currentParticle.GetKineticEnergy()/MeV > cutOff) ||
      (G4UniformRand() > anni) )
    Cascade(vec, vecLen, originalIncident, currentParticle, targetParticle,
            incidentHasChanged, targetHasChanged, quasiElastic);
  else
    quasiElastic = true;
    
  CalculateMomenta(vec, vecLen, originalIncident, originalTarget,
                   modifiedOriginal, targetNucleus, currentParticle,
                   targetParticle, incidentHasChanged, targetHasChanged,
                   quasiElastic);
    
  SetUpChange(vec, vecLen, currentParticle, targetParticle, incidentHasChanged);

  if (isotopeProduction) DoIsotopeCounting(originalIncident, targetNucleus);

  delete originalTarget;
  return &theParticleChange;
}

void G4LEAntiNeutronInelastic::ModelDescription

(

std::ostream &

outFile

)

const [virtual]

Reimplemented from G4HadronicInteraction.

Definition at line 52 of file G4LEAntiNeutronInelastic.cc.

{
  outFile << "G4LEAntiNeutronInelastic is one of the Low Energy\n"
          << "Parameterized (LEP) models used to implement inelastic\n"
          << "anti-neutron scattering from nuclei.  It is a re-engineered\n"
          << "version of the GHEISHA code of H. Fesefeldt.  It divides the\n"
          << "initial collision products into backward- and forward-going\n"
          << "clusters which are then decayed into final state hadrons.\n"
          << "The model does not conserve energy on an event-by-event\n"
          << "basis.  It may be applied to anti-neutrons with initial\n"
          << "energies between 0 and 25 GeV.\n";
}

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

• G4LEAntiNeutronInelastic.hh
• G4LEAntiNeutronInelastic.cc

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