G4RPGProtonInelastic Class Reference

#include <G4RPGProtonInelastic.hh>

Inheritance diagram for G4RPGProtonInelastic:

Public Member Functions
	G4RPGProtonInelastic ()
	~G4RPGProtonInelastic ()
G4HadFinalState *	ApplyYourself (const G4HadProjectile &aTrack, G4Nucleus &targetNucleus)

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Detailed Description

Definition at line 43 of file G4RPGProtonInelastic.hh.

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Constructor & Destructor Documentation

G4RPGProtonInelastic::G4RPGProtonInelastic

(

)

[inline]

Definition at line 47 of file G4RPGProtonInelastic.hh.

                          : G4RPGNucleonInelastic("RPGProtonInelastic")
   {}

G4RPGProtonInelastic::~G4RPGProtonInelastic

(

)

[inline]

Definition at line 50 of file G4RPGProtonInelastic.hh.

   {}

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Member Function Documentation

G4HadFinalState * G4RPGProtonInelastic::ApplyYourself	(	const G4HadProjectile &	aTrack,
		G4Nucleus &	targetNucleus
	)			[virtual]

Implements G4HadronicInteraction.

Definition at line 34 of file G4RPGProtonInelastic.cc.

References G4RPGInelastic::CalculateMomenta(), G4Nucleus::Cinema(), G4HadFinalState::Clear(), G4Nucleus::EvaporationEffects(), G4UniformRand, G4HadProjectile::Get4Momentum(), G4HadProjectile::GetDefinition(), G4ReactionProduct::GetKineticEnergy(), G4HadProjectile::GetKineticEnergy(), G4ReactionProduct::GetMomentum(), G4ParticleDefinition::GetPDGMass(), G4FastVector< Type, N >::Initialize(), isAlive, G4InuclParticleNames::pp, G4Nucleus::ReturnTargetParticle(), G4HadFinalState::SetEnergyChange(), G4ReactionProduct::SetKineticEnergy(), G4ReactionProduct::SetMomentum(), G4HadFinalState::SetMomentumChange(), G4ReactionProduct::SetSide(), G4HadFinalState::SetStatusChange(), G4RPGInelastic::SetUpChange(), and G4HadronicInteraction::theParticleChange.

{
  theParticleChange.Clear();
  const G4HadProjectile *originalIncident = &aTrack;
  if (originalIncident->GetKineticEnergy()<= 0.1) 
  {
    theParticleChange.SetStatusChange(isAlive);
    theParticleChange.SetEnergyChange(aTrack.GetKineticEnergy());
    theParticleChange.SetMomentumChange(aTrack.Get4Momentum().vect().unit()); 
    return &theParticleChange;      
  }

  //
  // create the target particle
  //
  G4DynamicParticle *originalTarget = targetNucleus.ReturnTargetParticle();

  if (originalIncident->GetKineticEnergy()/GeV < 0.01+2.*G4UniformRand()/9. )
  {
    SlowProton( originalIncident, targetNucleus );
    delete originalTarget;
    return &theParticleChange;
  }

  // Fermi motion and evaporation
  // As of Geant3, the Fermi energy calculation had not been Done

  G4double ek = originalIncident->GetKineticEnergy();
  G4double amas = originalIncident->GetDefinition()->GetPDGMass();
  G4ReactionProduct modifiedOriginal;
  modifiedOriginal = *originalIncident;
    
  G4double tkin = targetNucleus.Cinema( ek );
  ek += tkin;
  modifiedOriginal.SetKineticEnergy(ek);
  G4double et = ek + amas;
  G4double p = std::sqrt( std::abs((et-amas)*(et+amas)) );
  G4double pp = modifiedOriginal.GetMomentum().mag();
  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);
  et = ek + amas;
  p = std::sqrt( std::abs((et-amas)*(et+amas)) );
  pp = modifiedOriginal.GetMomentum().mag();
  if (pp > 0.0) {
    G4ThreeVector momentum = modifiedOriginal.GetMomentum();
    modifiedOriginal.SetMomentum( momentum * (p/pp) );
  }
  const G4double cutOff = 0.1;
  if (modifiedOriginal.GetKineticEnergy() < cutOff) {
    SlowProton( originalIncident, targetNucleus );
    delete originalTarget;
    return &theParticleChange;
  }

  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,256> vec;  // vec will contain the sec. particles
  G4int vecLen = 0;
  vec.Initialize( 0 );

  InitialCollision(vec, vecLen, currentParticle, targetParticle,
                   incidentHasChanged, targetHasChanged);

  CalculateMomenta(vec, vecLen,
                   originalIncident, originalTarget, modifiedOriginal,
                   targetNucleus, currentParticle, targetParticle,
                   incidentHasChanged, targetHasChanged, quasiElastic);

  SetUpChange( vec, vecLen,
               currentParticle, targetParticle,
               incidentHasChanged );

  delete originalTarget;
  return &theParticleChange;
}

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

• G4RPGProtonInelastic.hh
• G4RPGProtonInelastic.cc

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