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 // Hadronic Process: Alpha Inelastic Process
 // J.L. Chuma, TRIUMF, 25-Feb-1997
 // Last modified: 27-Mar-1997
 // J.L. Chuma, 08-May-2001: Update original incident passed back in vec[0]
 //                          from NuclearReaction
 //
#include "G4LEAlphaInelastic.hh"
#include "Randomize.hh"
#include "G4Electron.hh"
 
 G4HadFinalState *
  G4LEAlphaInelastic::ApplyYourself( const G4HadProjectile &aTrack,
                                     G4Nucleus &targetNucleus )
  {
    theParticleChange.Clear();
    G4double A = targetNucleus.GetN();
    G4double Z = targetNucleus.GetZ();
        
    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];
    //
    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];
    }
    //
    return &theParticleChange;
  }
 
 /* end of file */