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// $Id: G4DNAChargeDecreaseInWater.icc,v 1.4 2006/06/29 19:33:42 gunter Exp $
// GEANT4 tag $Name: geant4-08-02 $
//

#ifdef    G4DNACHARGEDECREASEINWATER_HH
 template<typename TotalCrossSectionPolicy, typename FinalStatesPolicy>
 G4VParticleChange *                      G4DNAChargeDecreaseInWater<TotalCrossSectionPolicy, FinalStatesPolicy> :: PostStepDoIt(const G4Track & aTrack, const G4Step & aStep)
 {
  this->aParticleChange.Initialize(aTrack);
  this->aParticleChange.ProposeTrackStatus(fStopAndKill);

  G4double inK(aTrack.GetDynamicParticle()->GetKineticEnergy());

  const G4int z(10); // H2O number of electrons
  G4int finalStateIndex(TotalCrossSectionPolicy::RandomizePartialCrossSection(inK, z));
 
  G4int n(FinalStatesPolicy::NumberOfFinalStates(finalStateIndex));
  G4double waterBindingEnergy(FinalStatesPolicy::WaterBindingEnergyConstant(finalStateIndex));
  G4double outgoingParticleBindingEnergy(FinalStatesPolicy::OutgoingParticleBindingEnergyConstant(finalStateIndex));
  
  G4double outK(inK - n*(inK*electron_mass_c2/proton_mass_c2) - waterBindingEnergy + outgoingParticleBindingEnergy);

  if (outK<0)
  {
   G4String message;
   message="G4DNAChargeDecreaseInWater<>::PostStepDoIt - Final kinetic energy is below 0! Process ";
   message+=this->GetProcessName();
   
   G4Exception(message);
  }

  this->aParticleChange.ProposeLocalEnergyDeposit(waterBindingEnergy);
  this->aParticleChange.SetNumberOfSecondaries(1);
  this->aParticleChange.AddSecondary(new G4DynamicParticle(FinalStatesPolicy::OutgoingParticleDefinition(finalStateIndex), aTrack.GetDynamicParticle()->GetMomentumDirection(), outK));
             
  return G4VDNAProcessInWater<TotalCrossSectionPolicy, FinalStatesPolicy>::PostStepDoIt(aTrack, aStep);
/* aParticleChange.Initialize(aTrack);
 G4double k=aTrack.GetDynamicParticle()->GetKineticEnergy();
 
 G4int    finalStateIndex(FinalStatesPolicy::NumberOfFinalStates()); 
 G4int    randomShell;
 G4double electronBindingEnergy=0.;
   for(G4int index=0; index<finalStateIndex; index++)
   {
   randomShell = TotalCrossSectionPolicy::RandomizePartialCrossSection(k);
   electronBindingEnergy+=TotalCrossSectionPolicy::WaterBindingEnergy(randomShell);
   }
  G4double overallBindingEnergy(FinalStatesPolicy::OverallBindingEnergyConstant(finalStateIndex)); 
  aParticleChange.ProposeLocalEnergyDeposit(electronBindingEnergy);
  aParticleChange.SetNumberOfSecondaries(1);
  G4DynamicParticle *newParticle = new G4DynamicParticle(FinalStatesPolicy::OutgoingParticleDefinition(finalStateIndex),
           aTrack.GetDynamicParticle()->GetMomentumDirection(),
           k-finalStateIndex*(k*electron_mass_c2/proton_mass_c2)-electronBindingEnergy+overallBindingEnergy);
  aParticleChange.ProposeTrackStatus(fStopAndKill);
  aParticleChange.AddSecondary(newParticle); 
 
 return G4VDNAProcessInWater<TotalCrossSectionPolicy, FinalStatesPolicy>::PostStepDoIt(aTrack, aStep); */
 }
#endif /* G4DNACHARGEDECREASEINWATER_HH */