G4LEAlphaInelastic Class Reference

#include <G4LEAlphaInelastic.hh>

Inheritance diagram for G4LEAlphaInelastic:

Public Member Functions
	G4LEAlphaInelastic (const G4String &name="G4LEAlphaInelastic")
	~G4LEAlphaInelastic ()
G4HadFinalState *	ApplyYourself (const G4HadProjectile &aTrack, G4Nucleus &targetNucleus)
virtual void	ModelDescription (std::ostream &outFile) const

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Detailed Description

Definition at line 43 of file G4LEAlphaInelastic.hh.

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Constructor & Destructor Documentation

G4LEAlphaInelastic::G4LEAlphaInelastic

(

const G4String &

name = "G4LEAlphaInelastic"

)

Definition at line 38 of file G4LEAlphaInelastic.cc.

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

 : G4InelasticInteraction(name)
{
  SetMinEnergy(0.0*GeV);
  SetMaxEnergy(10.*TeV);
  G4cout << "WARNING: model G4LEAlphaInelastic is being deprecated and will\n"
         << "disappear in Geant4 version 10.0"  << G4endl;
}

G4LEAlphaInelastic::~G4LEAlphaInelastic

(

)

[inline]

Definition at line 49 of file G4LEAlphaInelastic.hh.

{ }

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Member Function Documentation

G4HadFinalState * G4LEAlphaInelastic::ApplyYourself	(	const G4HadProjectile &	aTrack,
		G4Nucleus &	targetNucleus
	)			[virtual]

Implements G4HadronicInteraction.

Definition at line 63 of file G4LEAlphaInelastic.cc.

References G4HadFinalState::AddSecondary(), G4Nucleus::AtomicMass(), G4HadFinalState::Clear(), G4InelasticInteraction::DoIsotopeCounting(), G4cout, G4endl, G4HadProjectile::Get4Momentum(), G4Nucleus::GetA_asInt(), G4HadProjectile::GetDefinition(), G4HadProjectile::GetKineticEnergy(), G4HadProjectile::GetMaterial(), G4Material::GetName(), G4ParticleDefinition::GetPDGMass(), G4Nucleus::GetZ_asInt(), G4FastVector< Type, N >::Initialize(), isAlive, G4InelasticInteraction::isotopeProduction, G4ReactionDynamics::NuclearReaction(), G4DynamicParticle::SetDefinition(), G4HadFinalState::SetEnergyChange(), G4DynamicParticle::SetMomentum(), G4HadFinalState::SetMomentumChange(), G4HadFinalState::SetStatusChange(), G4HadronicInteraction::theParticleChange, G4InelasticInteraction::theReactionDynamics, and G4HadronicInteraction::verboseLevel.

{
  theParticleChange.Clear();
  const G4HadProjectile* originalIncident = &aTrack;

  G4double A = targetNucleus.GetA_asInt();
  G4double Z = targetNucleus.GetZ_asInt();
        
  G4double kineticEnergy = aTrack.Get4Momentum().e()-aTrack.GetDefinition()->GetPDGMass();
  if (verboseLevel > 1) {
    const G4Material *targetMaterial = aTrack.GetMaterial();
    G4cout << "G4LEAlphaInelastic::ApplyYourself called" << G4endl;
    G4cout << "kinetc energy = " <<kineticEnergy/MeV << "MeV, ";
    G4cout << "target material = " << targetMaterial->GetName() << G4endl;
  }
    
  // Work-around for lack of model above 100 MeV
  if (kineticEnergy/MeV > 100. || kineticEnergy <= 0.1*MeV) {
    theParticleChange.SetStatusChange(isAlive);
    theParticleChange.SetEnergyChange(aTrack.GetKineticEnergy());
    theParticleChange.SetMomentumChange(aTrack.Get4Momentum().vect().unit()); 
    return &theParticleChange;      
  }
  G4double theAtomicMass = targetNucleus.AtomicMass( A, Z );
  G4double massVec[9];
  massVec[0] = targetNucleus.AtomicMass( A+4.0, Z+2.0 );
  massVec[1] = targetNucleus.AtomicMass( A+3.0, Z+2.0 );
  massVec[2] = targetNucleus.AtomicMass( A+3.0, Z+1.0 );
  massVec[3] = targetNucleus.AtomicMass( A+2.0, Z+1.0 );
  massVec[4] = targetNucleus.AtomicMass( A+1.0, Z+1.0 );
  massVec[5] = theAtomicMass;
  massVec[6] = targetNucleus.AtomicMass( A+2.0, Z+2.0 );
  massVec[7] = massVec[3];
  massVec[8] = targetNucleus.AtomicMass( A+2.0, Z     );

  G4FastVector<G4ReactionProduct,4> vec;  // vec will contain the secondary particles
  G4int vecLen = 0;
  vec.Initialize( 0 );

  theReactionDynamics.NuclearReaction(vec, vecLen, &aTrack,
                                      targetNucleus, theAtomicMass, massVec);

  G4double p = vec[0]->GetMomentum().mag();
  theParticleChange.SetMomentumChange( vec[0]->GetMomentum() *(1./p));
  theParticleChange.SetEnergyChange( vec[0]->GetKineticEnergy() );
  delete vec[0];

  if (vecLen <= 1) 
    {
      theParticleChange.SetStatusChange(isAlive);
      theParticleChange.SetEnergyChange(aTrack.GetKineticEnergy());
      theParticleChange.SetMomentumChange(aTrack.Get4Momentum().vect().unit()); 
      return &theParticleChange;      
    }

  G4DynamicParticle *pd;
  for (G4int i = 1; i < vecLen; ++i) {
    pd = new G4DynamicParticle();
    pd->SetDefinition( vec[i]->GetDefinition() );
    pd->SetMomentum( vec[i]->GetMomentum() );
    theParticleChange.AddSecondary( pd );
    delete vec[i];
  }

  if (isotopeProduction) DoIsotopeCounting(originalIncident, targetNucleus); 
  return &theParticleChange;
}

void G4LEAlphaInelastic::ModelDescription

(

std::ostream &

outFile

)

const [virtual]

Reimplemented from G4HadronicInteraction.

Definition at line 48 of file G4LEAlphaInelastic.cc.

{
  outFile << "G4LEAlphaInelastic is one of the Low Energy Parameterized\n"
          << "(LEP) models used to implement inelastic alpha scattering\n"
          << "from nuclei.  It is a re-engineered version of the GHEISHA\n"
          << "code of H. Fesefeldt. It divides the initial collision\n"
          << "products into backward- and forward-going clusters which are\n"
          << "then decayed into final state hadrons.  The model does not\n"
          << "conserve energy on an event-by-event basis.  It may be\n"
          << "applied to alphas with initial energies between 0 and 10\n"
          << "TeV.\n";
}

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

• G4LEAlphaInelastic.hh
• G4LEAlphaInelastic.cc

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