G4BinaryLightIonReaction.cc

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#include <algorithm>
#include <vector>
#include <cmath>
#include <numeric>

#include "G4BinaryLightIonReaction.hh"
#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"
#include "G4LorentzVector.hh"
#include "G4LorentzRotation.hh"
#include "G4ReactionProductVector.hh"
#include "G4ping.hh"
#include "G4Delete.hh"
#include "G4Neutron.hh"
#include "G4VNuclearDensity.hh"
#include "G4FermiMomentum.hh"
#include "G4HadTmpUtil.hh"
#include "G4PreCompoundModel.hh"
#include "G4HadronicInteractionRegistry.hh"

//#define debug_G4BinaryLightIonReaction
//#define debug_BLIR_finalstate

G4BinaryLightIonReaction::G4BinaryLightIonReaction(G4VPreCompoundModel* ptr)
: G4HadronicInteraction("Binary Light Ion Cascade"),
  theProjectileFragmentation(ptr),
  pA(0),pZ(0), tA(0),tZ(0),spectatorA(0),spectatorZ(0),
  projectile3dNucleus(0),target3dNucleus(0)
{
        if(!ptr) {
          G4HadronicInteraction* p =
            G4HadronicInteractionRegistry::Instance()->FindModel("PRECO");
          G4VPreCompoundModel* pre = static_cast<G4VPreCompoundModel*>(p);
          if(!pre) { pre = new G4PreCompoundModel(); }
          theProjectileFragmentation = pre;
        }
        theModel = new G4BinaryCascade(theProjectileFragmentation);
        theHandler = theProjectileFragmentation->GetExcitationHandler();

        debug_G4BinaryLightIonReactionResults=getenv("debug_G4BinaryLightIonReactionResults")!=0;
}

G4BinaryLightIonReaction::~G4BinaryLightIonReaction()
{}

void G4BinaryLightIonReaction::ModelDescription(std::ostream& outFile) const
{
        outFile << "G4Binary Light Ion Cascade is an intra-nuclear cascade model\n"
                        << "using G4BinaryCasacde to model the interaction of a light\n"
                        << "nucleus with a nucleus.\n"
                        << "The lighter of the two nuclei is treated like a set of projectiles\n"
                        << "which are transported simultanously through the heavier nucleus.\n";
}

//--------------------------------------------------------------------------------
struct ReactionProduct4Mom
{
   G4LorentzVector operator()(G4LorentzVector a,G4ReactionProduct* b) {return a + G4LorentzVector(b->GetMomentum(), b->GetTotalEnergy() );}
};

G4HadFinalState *G4BinaryLightIonReaction::
ApplyYourself(const G4HadProjectile &aTrack, G4Nucleus & targetNucleus )
{
        if(getenv("BLICDEBUG") ) G4cerr << " ######### Binary Light Ion Reaction starts ######### " << G4endl;
        G4ping debug("debug_G4BinaryLightIonReaction");
        pA=aTrack.GetDefinition()->GetBaryonNumber();
        pZ=G4lrint(aTrack.GetDefinition()->GetPDGCharge()/eplus);
        tA=targetNucleus.GetA_asInt();
        tZ=targetNucleus.GetZ_asInt();

        G4LorentzVector mom(aTrack.Get4Momentum());
   //G4cout << "proj mom : " << mom << G4endl;
        G4LorentzRotation toBreit(mom.boostVector());

        G4bool swapped=SetLighterAsProjectile(mom, toBreit);
   //G4cout << "after swap, swapped? / mom " << swapped << " / " << mom <<G4endl;
        G4ReactionProductVector * result = 0;
        G4ReactionProductVector * cascaders=0; //new G4ReactionProductVector;
//      G4double m_nucl(0);      // to check energy balance


        //    G4double m1=G4ParticleTable::GetParticleTable()->GetIonTable()->GetIonMass(pZ,pA);
        //    G4cout << "Entering the decision point "
        //           << (mom.t()-mom.mag())/pA << " "
        //         << pA<<" "<< pZ<<" "
        //         << tA<<" "<< tZ<<G4endl
        //         << " "<<mom.t()-mom.mag()<<" "
        //         << mom.t()- m1<<G4endl;
        if( (mom.t()-mom.mag())/pA < 50*MeV )
        {
                //      G4cout << "Using pre-compound only, E= "<<mom.t()-mom.mag()<<G4endl;
                //      m_nucl = mom.mag();
      cascaders=FuseNucleiAndPrompound(mom);
      if( !cascaders )
      {

         // abort!! happens for too low energy for nuclei to fuse

         theResult.Clear();
         theResult.SetStatusChange(isAlive);
         theResult.SetEnergyChange(aTrack.GetKineticEnergy());
         theResult.SetMomentumChange(aTrack.Get4Momentum().vect().unit());
         return &theResult;
      }
        }
        else
        {
           result=Interact(mom,toBreit);

      if(! result )
      {
            // abort!!

            G4cerr << "G4BinaryLightIonReaction no final state for: " << G4endl;
            G4cerr << " Primary " << aTrack.GetDefinition()
               << ", (A,Z)=(" << aTrack.GetDefinition()->GetBaryonNumber()
               << "," << aTrack.GetDefinition()->GetPDGCharge()/eplus << ") "
               << ", kinetic energy " << aTrack.GetKineticEnergy()
               << G4endl;
            G4cerr << " Target nucleus (A,Z)=("
                   <<  (swapped?pA:tA)  << ","
                   << (swapped?pZ:tZ) << ")" << G4endl;
            G4cerr << " if frequent, please submit above information as bug report"
                  << G4endl << G4endl;

            theResult.Clear();
            theResult.SetStatusChange(isAlive);
            theResult.SetEnergyChange(aTrack.GetKineticEnergy());
            theResult.SetMomentumChange(aTrack.Get4Momentum().vect().unit());
            return &theResult;
      }

                // Calculate excitation energy,
      G4double theStatisticalExEnergy = GetProjectileExcitation();


                pInitialState = mom;
                //G4cout << "pInitialState from aTrack : " << pInitialState;
                pInitialState.setT(pInitialState.getT() +
                     G4ParticleTable::GetParticleTable()->GetIonTable()->GetIonMass(tZ,tA));
      //G4cout << "target nucleus added : " << pInitialState << G4endl;

                delete target3dNucleus;target3dNucleus=0;
                delete projectile3dNucleus;projectile3dNucleus=0;

      G4ReactionProductVector * spectators= new G4ReactionProductVector;

      cascaders = new G4ReactionProductVector;

      G4LorentzVector pspectators=SortResult(result,spectators,cascaders);

      //      pFinalState=std::accumulate(cascaders->begin(),cascaders->end(),pFinalState,ReactionProduct4Mom);
      std::vector<G4ReactionProduct *>::iterator iter;

      //G4cout << "pInitialState, pFinalState / pspectators"<< pInitialState << " / " << pFinalState << " / " << pspectators << G4endl;
                //      if ( spectA-spectatorA !=0 || spectZ-spectatorZ !=0)
                //      {
                //          G4cout << "spect Nucl != spectators: nucl a,z; spect a,z" <<
                //            spectatorA <<" "<< spectatorZ <<" ; " << spectA <<" "<< spectZ << G4endl;
                //      }
                delete result;
                result=0;
                G4LorentzVector momentum(pInitialState-pFinalState);
                G4int loopcount(0);
                //G4cout << "momentum, pspectators : " << momentum << " / " << pspectators << G4endl;
                while (std::abs(momentum.e()-pspectators.e()) > 10*MeV)
                {
                        G4LorentzVector pCorrect(pInitialState-pspectators);
                   //G4cout << "BIC nonconservation? (pInitialState-pFinalState) / spectators :" << momentum << " / " << pspectators << "pCorrect "<< pCorrect<< G4endl;
                        // Correct outgoing casacde particles.... to have momentum of (initial state - spectators)
                        G4bool EnergyIsCorrect=EnergyAndMomentumCorrector(cascaders, pCorrect);
                        if ( ! EnergyIsCorrect && debug_G4BinaryLightIonReactionResults)
                        {
                                G4cout << "Warning - G4BinaryLightIonReaction E/P correction for cascaders failed" << G4endl;
                        }
                        pFinalState=G4LorentzVector(0,0,0,0);
                        for(iter=cascaders->begin(); iter!=cascaders->end(); iter++)
                        {
                                pFinalState += G4LorentzVector( (*iter)->GetMomentum(), (*iter)->GetTotalEnergy() );
                        }
                        momentum=pInitialState-pFinalState;
                        if (++loopcount > 10 )
                        {
                                if ( momentum.vect().mag() - momentum.e()> 10*keV  )
                                {
                                        G4cerr << "G4BinaryLightIonReaction.cc: Cannot correct 4-momentum of cascade particles" << G4endl;
                                        throw G4HadronicException(__FILE__, __LINE__, "G4BinaryCasacde::ApplyCollision()");
                                } else {
                                        break;
                                }

                        }
                }

        if (spectatorA > 0 )
                {
                   // check spectator momentum
                   if ( momentum.vect().mag() - momentum.e()> 10*keV )
                   {

                      for (iter=spectators->begin();iter!=spectators->end();iter++)
                      {
                         delete *iter;
                      }
                      delete spectators;
                          for(iter=cascaders->begin(); iter!=cascaders->end(); iter++)
                          {
                                 delete *iter;
                          }
                          delete cascaders;

                      G4cout << "G4BinaryLightIonReaction.cc: mom check: " <<  momentum
                            << " 3.mag "<< momentum.vect().mag() << G4endl
                            << " .. pInitialState/pFinalState/spectators " << pInitialState <<" "
                            << pFinalState << " " << pspectators << G4endl
                            << " .. A,Z " << spectatorA <<" "<< spectatorZ << G4endl;
                      G4cout << "G4BinaryLightIonReaction invalid final state for: " << G4endl;
                      G4cout << " Primary " << aTrack.GetDefinition()
                              << ", (A,Z)=(" << aTrack.GetDefinition()->GetBaryonNumber()
                              << "," << aTrack.GetDefinition()->GetPDGCharge()/eplus << ") "
                              << ", kinetic energy " << aTrack.GetKineticEnergy()
                              << G4endl;
                      G4cout << " Target nucleus (A,Z)=(" <<  targetNucleus.GetA_asInt()
                              << "," << targetNucleus.GetZ_asInt() << ")" << G4endl;
                      G4cout << " if frequent, please submit above information as bug report"
                            << G4endl << G4endl;

                      theResult.Clear();
                      theResult.SetStatusChange(isAlive);
                      theResult.SetEnergyChange(aTrack.GetKineticEnergy());
                      theResult.SetMomentumChange(aTrack.Get4Momentum().vect().unit());
                      return &theResult;
                   }


                   DeExciteSpectatorNucleus(spectators, cascaders, theStatisticalExEnergy, momentum);
                } else {
                   delete spectators;
                }
        }
        // Rotate to lab
        G4LorentzRotation toZ;
        toZ.rotateZ(-1*mom.phi());
        toZ.rotateY(-1*mom.theta());
        G4LorentzRotation toLab(toZ.inverse());

        // Fill the particle change, while rotating. Boost from projectile breit-frame in case we swapped.
        // theResult.Clear();
        theResult.Clear();
        theResult.SetStatusChange(stopAndKill);
        G4double Etot(0);
    G4ReactionProductVector::iterator iter;
        for(iter=cascaders->begin(); iter!=cascaders->end(); iter++)
        {
                if((*iter)->GetNewlyAdded())
                {
                        G4DynamicParticle * aNew =
                                        new G4DynamicParticle((*iter)->GetDefinition(),
                                                        (*iter)->GetTotalEnergy(),
                                                        (*iter)->GetMomentum() );
                        G4LorentzVector tmp = aNew->Get4Momentum();
                        if(swapped)
                        {
                                tmp*=toBreit.inverse();
                                tmp.setVect(-tmp.vect());
                        }
                        tmp *= toLab;
                        aNew->Set4Momentum(tmp);
                        //G4cout << "result[" << i << "], 4vect: " << tmp << G4endl;
                        theResult.AddSecondary(aNew);
                        Etot += tmp.e();
                        //        G4cout << "LIBIC: Secondary " << aNew->GetDefinition()->GetParticleName()
                        //               <<" "<<  aNew->GetMomentum()
                        //            <<" "<<  aNew->GetTotalEnergy()
                        //            << G4endl;
                }
                delete *iter;
        }
        delete cascaders;

#ifdef debug_BLIR_result
        G4cout << "Result analysis, secondaries" << theResult.GetNumberOfSecondaries() << G4endl;
        G4cout << " Energy conservation initial/primary/nucleus/final/delta(init-final) "
              << aTrack.GetTotalEnergy() + m_nucl << aTrack.GetTotalEnergy() << m_nucl <<Etot
              << aTrack.GetTotalEnergy() + m_nucl - Etot;
#endif

        if(getenv("BLICDEBUG") ) G4cerr << " ######### Binary Light Ion Reaction number ends ######### " << G4endl;

        return &theResult;
}

//--------------------------------------------------------------------------------

//****************************************************************************
G4bool G4BinaryLightIonReaction::EnergyAndMomentumCorrector(
                G4ReactionProductVector* Output, G4LorentzVector& TotalCollisionMom)
//****************************************************************************
{
        const int    nAttemptScale = 2500;
        const double ErrLimit = 1.E-6;
        if (Output->empty())
                return TRUE;
        G4LorentzVector SumMom(0,0,0,0);
        G4double        SumMass = 0;
        G4double        TotalCollisionMass = TotalCollisionMom.m();
        size_t i = 0;
        // Calculate sum hadron 4-momenta and summing hadron mass
        for(i = 0; i < Output->size(); i++)
        {
                SumMom  += G4LorentzVector((*Output)[i]->GetMomentum(),(*Output)[i]->GetTotalEnergy());
                SumMass += (*Output)[i]->GetDefinition()->GetPDGMass();
        }
          // G4cout << " E/P corrector, SumMass, SumMom.m2, TotalMass "
          //       << SumMass <<" "<< SumMom.m2() <<" "<<TotalCollisionMass<< G4endl;
        if (SumMass > TotalCollisionMass) return FALSE;
        SumMass = SumMom.m2();
        if (SumMass < 0) return FALSE;
        SumMass = std::sqrt(SumMass);

        // Compute c.m.s. hadron velocity and boost KTV to hadron c.m.s.
        G4ThreeVector Beta = -SumMom.boostVector();
              //G4cout << " == pre boost 2 "<< SumMom.e()<< " "<< SumMom.mag()<<" "<< Beta <<G4endl;
        //--old    Output->Boost(Beta);
        for(i = 0; i < Output->size(); i++)
        {
                G4LorentzVector mom = G4LorentzVector((*Output)[i]->GetMomentum(),(*Output)[i]->GetTotalEnergy());
                mom *= Beta;
                (*Output)[i]->SetMomentum(mom.vect());
                (*Output)[i]->SetTotalEnergy(mom.e());
        }

        // Scale total c.m.s. hadron energy (hadron system mass).
        // It should be equal interaction mass
        G4double Scale = 0,OldScale=0;
        G4double factor = 1.;
        G4int cAttempt = 0;
        G4double Sum = 0;
        G4bool success = false;
        for(cAttempt = 0; cAttempt < nAttemptScale; cAttempt++)
        {
                Sum = 0;
                for(i = 0; i < Output->size(); i++)
                {
                        G4LorentzVector HadronMom = G4LorentzVector((*Output)[i]->GetMomentum(),(*Output)[i]->GetTotalEnergy());
                        HadronMom.setVect(HadronMom.vect()+ factor*Scale*HadronMom.vect());
                        G4double E = std::sqrt(HadronMom.vect().mag2() + sqr((*Output)[i]->GetDefinition()->GetPDGMass()));
                        HadronMom.setE(E);
                        (*Output)[i]->SetMomentum(HadronMom.vect());
                        (*Output)[i]->SetTotalEnergy(HadronMom.e());
                        Sum += E;
                }
                OldScale=Scale;
                Scale = TotalCollisionMass/Sum - 1;
                //  G4cout << "E/P corr - " << cAttempt << " " << Scale << G4endl;
                if (std::abs(Scale) <= ErrLimit
                                || OldScale == Scale)                   // protect 'frozen' situation and divide by 0 in calculating new factor below
                {
                        if (debug_G4BinaryLightIonReactionResults) G4cout << "E/p corrector: " << cAttempt << G4endl;
                        success = true;
                        break;
                }
                if ( cAttempt > 10 )
                {
                        //         G4cout << " speed it up? " << std::abs(OldScale/(OldScale-Scale)) << G4endl;
                        factor=std::max(1.,std::log(std::abs(OldScale/(OldScale-Scale))));
                        //       G4cout << " ? factor ? " << factor << G4endl;
                }
        }

        if( (!success)  && debug_G4BinaryLightIonReactionResults)
        {
                G4cout << "G4G4BinaryLightIonReaction::EnergyAndMomentumCorrector - Warning"<<G4endl;
                G4cout << "   Scale not unity at end of iteration loop: "<<TotalCollisionMass<<" "<<Sum<<" "<<Scale<<G4endl;
                G4cout << "   Increase number of attempts or increase ERRLIMIT"<<G4endl;
        }

        // Compute c.m.s. interaction velocity and KTV back boost
        Beta = TotalCollisionMom.boostVector();
        //--old    Output->Boost(Beta);
        for(i = 0; i < Output->size(); i++)
        {
                G4LorentzVector mom = G4LorentzVector((*Output)[i]->GetMomentum(),(*Output)[i]->GetTotalEnergy());
                mom *= Beta;
                (*Output)[i]->SetMomentum(mom.vect());
                (*Output)[i]->SetTotalEnergy(mom.e());
        }
        return TRUE;
}
G4bool G4BinaryLightIonReaction::SetLighterAsProjectile(G4LorentzVector & mom,const G4LorentzRotation & toBreit)
{
   G4bool swapped = false;
   if(tA<pA)
   {
      swapped = true;
      G4int tmp(0);
      tmp = tA; tA=pA; pA=tmp;
      tmp = tZ; tZ=pZ; pZ=tmp;
      G4double m1=G4ParticleTable::GetParticleTable()->GetIonTable()->GetIonMass(pZ,pA);
      G4LorentzVector it(m1, G4ThreeVector(0,0,0));
      mom = toBreit*it;
   }
   return swapped;
}
G4ReactionProductVector * G4BinaryLightIonReaction::FuseNucleiAndPrompound(const G4LorentzVector & mom)
{
   // Check if kinematically nuclei can fuse.
   G4double mFused=G4ParticleTable::GetParticleTable()->GetIonTable()->GetIonMass(pZ+tZ,pA+tA);
   G4double mTarget=G4ParticleTable::GetParticleTable()->GetIonTable()->GetIonMass(tZ,tA);
   G4LorentzVector pCompound(mom.e()+mTarget,mom.vect());
   G4double m2Compound=pCompound.m2();
   if (m2Compound < sqr(mFused) ) {
           //G4cout << "G4BLIC: projectile p, mTarget, mFused, mCompound, delta: " <<mom <<  " " << mTarget <<  " " << mFused
           //      <<  " " << sqrt(m2Compound)<<  " " << sqrt(m2Compound) - mFused << G4endl;
           return 0;
   }

   G4Fragment aPreFrag;
   aPreFrag.SetA(pA+tA);
   aPreFrag.SetZ(pZ+tZ);
   aPreFrag.SetNumberOfParticles(pA);
   aPreFrag.SetNumberOfCharged(pZ);
   aPreFrag.SetNumberOfHoles(0);
   //GF FIXME: whyusing plop in z direction? this will not conserve momentum?
   //G4ThreeVector plop(0.,0., mom.vect().mag());
   //G4LorentzVector aL(mom.t()+mTarget, plop);
   G4LorentzVector aL(mom.t()+mTarget,mom.vect());
   aPreFrag.SetMomentum(aL);


         //G4cout << "Fragment INFO "<< pA+tA <<" "<<pZ+tZ<<" "
         //       << aL <<" "<<G4endl << aPreFrag << G4endl;
   G4ReactionProductVector * cascaders = theProjectileFragmentation->DeExcite(aPreFrag);
   //G4double tSum = 0;
   for(size_t count = 0; count<cascaders->size(); count++)
   {
      cascaders->operator[](count)->SetNewlyAdded(true);
      //tSum += cascaders->operator[](count)->GetKineticEnergy();
   }
   //       G4cout << "Exiting pre-compound only, E= "<<tSum<<G4endl;
   return cascaders;
}
G4ReactionProductVector * G4BinaryLightIonReaction::Interact(G4LorentzVector & mom, const G4LorentzRotation & toBreit)
{
      G4ReactionProductVector * result = 0;
      G4double projectileMass(0);
      G4LorentzVector it;

      G4int tryCount(0);
      do
      {
         ++tryCount;
         projectile3dNucleus = new G4Fancy3DNucleus;
         projectile3dNucleus->Init(pA, pZ);
         projectile3dNucleus->CenterNucleons();
         projectileMass=G4ParticleTable::GetParticleTable()->GetIonTable()->GetIonMass(
               projectile3dNucleus->GetCharge(),projectile3dNucleus->GetMassNumber());
         it=toBreit * G4LorentzVector(projectileMass,G4ThreeVector(0,0,0));

         target3dNucleus = new G4Fancy3DNucleus;
         target3dNucleus->Init(tA, tZ);
         G4double impactMax = target3dNucleus->GetOuterRadius()+projectile3dNucleus->GetOuterRadius();
         //        G4cout << "out radius - nucleus - projectile " << target3dNucleus->GetOuterRadius()/fermi << " - " << projectile3dNucleus->GetOuterRadius()/fermi << G4endl;
         G4double aX=(2.*G4UniformRand()-1.)*impactMax;
         G4double aY=(2.*G4UniformRand()-1.)*impactMax;
         G4ThreeVector pos(aX, aY, -2.*impactMax-5.*fermi);

         G4KineticTrackVector * initalState = new G4KineticTrackVector;
         projectile3dNucleus->StartLoop();
         G4Nucleon * aNuc;
         G4LorentzVector tmpV(0,0,0,0);
         G4LorentzVector nucleonMom(1./pA*mom);
         nucleonMom.setZ(nucleonMom.vect().mag());
         nucleonMom.setX(0);
         nucleonMom.setY(0);
         theFermi.Init(pA,pZ);
         while( (aNuc=projectile3dNucleus->GetNextNucleon()) )
         {
            G4LorentzVector p4 = aNuc->GetMomentum();
            tmpV+=p4;
            G4ThreeVector nucleonPosition(aNuc->GetPosition());
            G4double density=(projectile3dNucleus->GetNuclearDensity())->GetDensity(nucleonPosition);
            nucleonPosition += pos;
            G4KineticTrack * it1 = new G4KineticTrack(aNuc, nucleonPosition, nucleonMom );
            it1->SetState(G4KineticTrack::outside);
            G4double pfermi= theFermi.GetFermiMomentum(density);
            G4double mass = aNuc->GetDefinition()->GetPDGMass();
            G4double Efermi= std::sqrt( sqr(mass) + sqr(pfermi)) - mass;
            it1->SetProjectilePotential(-Efermi);
            initalState->push_back(it1);
         }

         result=theModel->Propagate(initalState, target3dNucleus);
         if( result && result->size()==0)
         {
            delete result;
            result=0;
         }
         if ( ! result )
         {
            delete target3dNucleus;
            delete projectile3dNucleus;
         }

         // std::for_each(initalState->begin(), initalState->end(), Delete<G4KineticTrack>());
         // delete initalState;

      } while (! result && tryCount< 150);
      return result;
}
G4double G4BinaryLightIonReaction::GetProjectileExcitation()
{
   spectatorA=spectatorZ=0;

      G4Nucleon * aNuc;
      //       targetNucleus->StartLoop();
      //       while( (aNuc=targetNucleus->GetNextNucleon()) )
      //       {
      //         G4cout << " tgt Nucleon : " << aNuc->GetDefinition()->GetParticleName() <<" "<< aNuc->AreYouHit() <<" "<<aNuc->GetMomentum()<<G4endl;
      //       }
      // the projectileNucleus excitation energy estimate...
      G4double theStatisticalExEnergy = 0;
      projectile3dNucleus->StartLoop();
      while( (aNuc=projectile3dNucleus->GetNextNucleon()) )
      {
         //        G4cout << " Nucleon : " << aNuc->GetDefinition()->GetParticleName() <<" "<< aNuc->AreYouHit() <<" "<<aNuc->GetMomentum()<<G4endl;
         if(!aNuc->AreYouHit())
         {
            spectatorA++;
            spectatorZ+=G4lrint(aNuc->GetDefinition()->GetPDGCharge()/eplus);
         }
         else
         {
            G4ThreeVector aPosition(aNuc->GetPosition());
            G4double localDensity = projectile3dNucleus->GetNuclearDensity()->GetDensity(aPosition);
            G4double localPfermi = theFermi.GetFermiMomentum(localDensity);
            G4double nucMass = aNuc->GetDefinition()->GetPDGMass();
            G4double localFermiEnergy = std::sqrt(nucMass*nucMass + localPfermi*localPfermi) - nucMass;
            G4double deltaE = localFermiEnergy - (aNuc->GetMomentum().t()-aNuc->GetMomentum().mag());
            theStatisticalExEnergy += deltaE;
         }
      }
      return theStatisticalExEnergy;
}

G4LorentzVector G4BinaryLightIonReaction::SortResult(G4ReactionProductVector * result, G4ReactionProductVector * spectators,G4ReactionProductVector * cascaders)
{
   unsigned int i(0);
   //      G4int spectA(0),spectZ(0);
   G4LorentzVector pspectators(0,0,0,0);
   pFinalState=G4LorentzVector(0,0,0,0);
   for(i=0; i<result->size(); i++)
   {
      if( (*result)[i]->GetNewlyAdded() )
      {
         pFinalState += G4LorentzVector( (*result)[i]->GetMomentum(), (*result)[i]->GetTotalEnergy() );
         cascaders->push_back((*result)[i]);
      }
      else {
         //          G4cout <<" spectator ... ";
         pspectators += G4LorentzVector( (*result)[i]->GetMomentum(), (*result)[i]->GetTotalEnergy() );
         spectators->push_back((*result)[i]);
         //   spectA++;
         //   spectZ+= G4lrint((*result)[i]->GetDefinition()->GetPDGCharge()/eplus);
      }

      //       G4cout << (*result)[i]<< " "
      //        << (*result)[i]->GetDefinition()->GetParticleName() << " "
      //        << (*result)[i]->GetMomentum()<< " "
      //        << (*result)[i]->GetTotalEnergy() << G4endl;
   }
   //G4cout << "pFinalState / pspectators" << pFinalState << " / " << pspectators << G4endl;
   return pspectators;
}

void G4BinaryLightIonReaction::DeExciteSpectatorNucleus(G4ReactionProductVector * spectators, G4ReactionProductVector * cascaders,
                                                 G4double theStatisticalExEnergy, G4LorentzVector & pSpectators)
{
   // call precompound model
   G4ReactionProductVector * proFrag = 0;
   G4LorentzVector pFragment(0.,0.,0.,0.);
   //      G4cout << " == pre boost 1 "<< momentum.e()<< " "<< momentum.mag()<<G4endl;
   G4LorentzRotation boost_fragments;
   //      G4cout << " == post boost 1 "<< momentum.e()<< " "<< momentum.mag()<<G4endl;
   //    G4LorentzRotation boost_spectator_mom(-momentum.boostVector());
   //     G4cout << "- momentum " << boost_spectator_mom * momentum << G4endl;
   G4LorentzVector pFragments(0,0,0,0);

   if(spectatorZ>0 && spectatorA>1)
   {
      //  Make the fragment
      G4Fragment aProRes;
      aProRes.SetA(spectatorA);
      aProRes.SetZ(spectatorZ);
      aProRes.SetNumberOfParticles(0);
      aProRes.SetNumberOfCharged(0);
      aProRes.SetNumberOfHoles(pA-spectatorA);
      G4double mFragment=G4ParticleTable::GetParticleTable()->GetIonTable()->GetIonMass(spectatorZ,spectatorA);
      pFragment=G4LorentzVector(0,0,0,mFragment+std::max(0.,theStatisticalExEnergy) );
      aProRes.SetMomentum(pFragment);

      proFrag = theHandler->BreakItUp(aProRes);

      boost_fragments = G4LorentzRotation(pSpectators.boostVector());

      //     G4cout << " Fragment a,z, Mass Fragment, mass spect-mom, exitationE "
      //       << spectatorA <<" "<< spectatorZ <<" "<< mFragment <<" "
      //       << momentum.mag() <<" "<< momentum.mag() - mFragment
      //       << " "<<theStatisticalExEnergy
      //       << " "<< boost_fragments*pFragment<< G4endl;
      G4ReactionProductVector::iterator ispectator;
      for (ispectator=spectators->begin();ispectator!=spectators->end();ispectator++)
      {
         delete *ispectator;
      }
   }
   else if(spectatorA!=0)
   {
      G4ReactionProductVector::iterator ispectator;
      for (ispectator=spectators->begin();ispectator!=spectators->end();ispectator++)
      {
         (*ispectator)->SetNewlyAdded(true);
         cascaders->push_back(*ispectator);
         pFragments+=G4LorentzVector((*ispectator)->GetMomentum(),(*ispectator)->GetTotalEnergy());
         //         G4cout << "from spectator "
         //          << (*ispectator)->GetDefinition()->GetParticleName() << " "
         //          << (*ispectator)->GetMomentum()<< " "
         //          << (*ispectator)->GetTotalEnergy() << G4endl;
      }
   }
   // / if (spectators)
   delete spectators;

   // collect the evaporation part and boost to spectator frame
   G4ReactionProductVector::iterator ii;
   if(proFrag)
   {
      for(ii=proFrag->begin(); ii!=proFrag->end(); ii++)
      {
         (*ii)->SetNewlyAdded(true);
         G4LorentzVector tmp((*ii)->GetMomentum(),(*ii)->GetTotalEnergy());
         tmp *= boost_fragments;
         (*ii)->SetMomentum(tmp.vect());
         (*ii)->SetTotalEnergy(tmp.e());
         //      result->push_back(*ii);
         pFragments += tmp;
      }
   }

   //    G4cout << "Fragmented p, momentum, delta " << pFragments <<" "<<momentum
   //            <<" "<< pFragments-momentum << G4endl;

   //  correct p/E of Cascade secondaries
   G4LorentzVector pCas=pInitialState - pFragments;

   //G4cout <<" Going to correct from " << pFinalState << " to " << pCas << G4endl;
   G4bool EnergyIsCorrect=EnergyAndMomentumCorrector(cascaders, pCas);
   if ( ! EnergyIsCorrect && debug_G4BinaryLightIonReactionResults)
   {
      G4cout << "G4BinaryLightIonReaction E/P correction for nucleus failed, will try to correct overall" << G4endl;
   }

   //  Add deexcitation secondaries
   if(proFrag)
   {
      for(ii=proFrag->begin(); ii!=proFrag->end(); ii++)
      {
         cascaders->push_back(*ii);
      }
      delete proFrag;
   }
   //G4cout << "EnergyIsCorrect? " << EnergyIsCorrect << G4endl;
   if ( ! EnergyIsCorrect )
   {
      //G4cout <<" ! EnergyIsCorrect " << pFinalState << " to " << pInitialState << G4endl;
      if (! EnergyAndMomentumCorrector(cascaders,pInitialState))
      {
         if(debug_G4BinaryLightIonReactionResults)
            G4cout << "G4BinaryLightIonReaction E/P corrections failed" << G4endl;
      }
   }

}