source: trunk/source/processes/hadronic/models/theo_high_energy/src/G4ProjectileDiffractiveChannel.cc@ 1199

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// $Id: G4ProjectileDiffractiveChannel.cc,v 1.2 2007/11/15 16:07:42 gunter Exp $
// GEANT4 tag $Name: geant4-09-03-cand-01 $
//

// Author : Gunter Folger Nov 2007
// Class Description
// Final state production model for theoretical models of hadron inelastic
// projectile diffractive scattering in geant4;
// Class Description - End
//
// Modified:

#include "G4ProjectileDiffractiveChannel.hh"

#include "G4HadTmpUtil.hh"              //lrint
#include "G4QHadronVector.hh"
#include "G4ParticleTable.hh"
#include "G4IonTable.hh"
#include "G4Lambda.hh"

//#define debug_getFraction 1
//#define debug_scatter 1

G4ProjectileDiffractiveChannel::G4ProjectileDiffractiveChannel()
{
        theQDiffraction=G4QDiffractionRatio::GetPointer();
}

G4ProjectileDiffractiveChannel::~G4ProjectileDiffractiveChannel()
{}

G4double G4ProjectileDiffractiveChannel::GetFraction(G4Nucleus &theNucleus,
                                const G4DynamicParticle & thePrimary)
{
        G4double ratio;
        ratio=theQDiffraction->GetRatio(thePrimary.GetTotalMomentum(),
                        thePrimary.GetDefinition()->GetPDGEncoding(),
                        G4lrint(theNucleus.GetZ()),
                        G4lrint(theNucleus.GetN()-theNucleus.GetZ()));
           #ifdef debug_getFraction                     
              G4cout << "G4ProjectileDiffractiveChannel::ratio " << ratio << G4endl;
           #endif
               
        return ratio;                   
}

G4KineticTrackVector * G4ProjectileDiffractiveChannel::Scatter(G4Nucleus &theNucleus,
                                        const G4DynamicParticle & thePrimary)
{
        
        
        G4int A=G4lrint(theNucleus.GetN());
        G4int Z=G4lrint(theNucleus.GetZ());

        G4ParticleDefinition * pDef=thePrimary.GetDefinition();
           #ifdef debug_scatter
             G4cout << " ProjectileDiffractive: A, Z,  proj-pdg" <<" "<< A <<" "<<Z 
                        << " "<<" " << pDef->GetParticleName()<< G4endl;
           #endif
        
        G4QHadronVector * result(0);
        G4KineticTrackVector * ktv(0);
        G4bool tryAgain;
        
        do {
           tryAgain = false;
           result=theQDiffraction->ProjFragment(pDef->GetPDGEncoding(),
                                thePrimary.Get4Momentum(),Z, A-Z);
                                
           if ( result && result->size() > 0 )
           {
               ktv=new G4KineticTrackVector();
               std::vector<G4QHadron *>::iterator i;
                 #ifdef debug_scatter
                    G4int count(0);
                 #endif
               for (i=result->begin(); i!=result->end(); i++)
               {
                  G4int pdgCode=(*i)->GetPDGCode();
                  G4ParticleDefinition * secDef(0);
                  if ( pdgCode < 80000000) {     // check if ion; should be 90Million, but 89Million is possible
                      secDef= G4ParticleTable::GetParticleTable()->FindParticle(pdgCode);
                  }else {
                      G4int N = pdgCode % 1000;
                      G4int Z = (pdgCode/1000) %1000;
                      if ( Z < 500 && N < 500){   // protect for delta being coded as/in nucleus 
                         secDef = G4ParticleTable::GetParticleTable()->GetIon(Z,N+Z, 0);
                         if ( ! secDef ) 
                         {  // exceptions to the rule!
                            if ( pdgCode == 90000001 ) secDef= G4Neutron::Neutron();
                            if ( pdgCode == 91000000 ) secDef= G4Lambda::Lambda();
                         }
                      }   
                  }
                  
                  if  ( secDef ){

                      G4ThreeVector pos=(*i)->GetPosition();  //GetPosition returns const &
                      G4LorentzVector mom=(*i)->Get4Momentum();

                      G4KineticTrack * sPrim=new G4KineticTrack(secDef,
                                      (*i)->GetFormationTime(), pos, mom);
                      ktv->push_back(sPrim);

                        #ifdef debug_scatter
                          G4cout << "G4ProjectileDiffractive sec # "  << ++count << ", "
                            << "ChipsPDGCode=" << pdgCode << ", "
                            << secDef->GetParticleName() 
                            << ", time(ns) " << (*i)->GetFormationTime()/ns
                            << ", pos " << pos
                            << ", 4mom " << (*i)->Get4Momentum()
                            << G4endl;
                        #endif
                   } else {
                       #ifdef debug_scatter
                         G4cout << "G4ProjectileDiffractiveChannel: Particle with PDG code "<< pdgCode <<" does not converted!!!"<<G4endl;
                       #endif 
                       tryAgain=true;
                   }
               }   
               std::for_each(result->begin(), result->end(), DeleteQHadron());
               delete result;
               result=0;
           }
            
           if ( result ) delete result;
           if ( tryAgain ) {     // QDiffraction returned a "difficult" particle in nucleus
               std::for_each(ktv->begin(), ktv->end(), DeleteKineticTrack());
               delete ktv;
               ktv=0;
           }
        } while ( ! ktv);          

        return ktv;                            
}