Index: trunk/source/processes/hadronic/models/chiral_inv_phase_space/interface/src/G4GammaNuclearReaction.cc
===================================================================
--- trunk/source/processes/hadronic/models/chiral_inv_phase_space/interface/src/G4GammaNuclearReaction.cc	(revision 968)
+++ trunk/source/processes/hadronic/models/chiral_inv_phase_space/interface/src/G4GammaNuclearReaction.cc	(revision 968)
@@ -0,0 +1,56 @@
+//
+// ********************************************************************
+// * License and Disclaimer                                           *
+// *                                                                  *
+// * The  Geant4 software  is  copyright of the Copyright Holders  of *
+// * the Geant4 Collaboration.  It is provided  under  the terms  and *
+// * conditions of the Geant4 Software License,  included in the file *
+// * LICENSE and available at  http://cern.ch/geant4/license .  These *
+// * include a list of copyright holders.                             *
+// *                                                                  *
+// * Neither the authors of this software system, nor their employing *
+// * institutes,nor the agencies providing financial support for this *
+// * work  make  any representation or  warranty, express or implied, *
+// * regarding  this  software system or assume any liability for its *
+// * use.  Please see the license in the file  LICENSE  and URL above *
+// * for the full disclaimer and the limitation of liability.         *
+// *                                                                  *
+// * This  code  implementation is the result of  the  scientific and *
+// * technical work of the GEANT4 collaboration.                      *
+// * By using,  copying,  modifying or  distributing the software (or *
+// * any work based  on the software)  you  agree  to acknowledge its *
+// * use  in  resulting  scientific  publications,  and indicate your *
+// * acceptance of all terms of the Geant4 Software license.          *
+// ********************************************************************
+//
+
+//
+// Created:
+// 01.09.2008 V.Ivanchenko 
+//
+
+#include "G4GammaNuclearReaction.hh"
+#include "G4Gamma.hh"
+#include "G4Nucleus.hh"
+#include "G4HadFinalState.hh"
+#include "G4HadProjectile.hh"
+
+G4GammaNuclearReaction::G4GammaNuclearReaction(): 
+  G4HadronicInteraction("CHIPS")
+{}
+
+G4GammaNuclearReaction::~G4GammaNuclearReaction()
+{}
+
+G4HadFinalState * G4GammaNuclearReaction::ApplyYourself(
+	   const G4HadProjectile& aTrack, 
+	   G4Nucleus& aTargetNucleus)
+{
+  if(aTrack.GetDefinition() != G4Gamma::GammaDefinition())
+  {
+    throw G4HadronicException(__FILE__, __LINE__, 
+			      "Called G4GammaNuclearReaction for particle other than gamma");
+  }
+  return theModel.ApplyYourself(aTrack, aTargetNucleus);
+}
+
Index: trunk/source/processes/hadronic/models/chiral_inv_phase_space/interface/src/G4QIonIonElastic.cc
===================================================================
--- trunk/source/processes/hadronic/models/chiral_inv_phase_space/interface/src/G4QIonIonElastic.cc	(revision 968)
+++ trunk/source/processes/hadronic/models/chiral_inv_phase_space/interface/src/G4QIonIonElastic.cc	(revision 968)
@@ -0,0 +1,527 @@
+//
+// ********************************************************************
+// * License and Disclaimer                                           *
+// *                                                                  *
+// * The  Geant4 software  is  copyright of the Copyright Holders  of *
+// * the Geant4 Collaboration.  It is provided  under  the terms  and *
+// * conditions of the Geant4 Software License,  included in the file *
+// * LICENSE and available at  http://cern.ch/geant4/license .  These *
+// * include a list of copyright holders.                             *
+// *                                                                  *
+// * Neither the authors of this software system, nor their employing *
+// * institutes,nor the agencies providing financial support for this *
+// * work  make  any representation or  warranty, express or implied, *
+// * regarding  this  software system or assume any liability for its *
+// * use.  Please see the license in the file  LICENSE  and URL above *
+// * for the full disclaimer and the limitation of liability.         *
+// *                                                                  *
+// * This  code  implementation is the result of  the  scientific and *
+// * technical work of the GEANT4 collaboration.                      *
+// * By using,  copying,  modifying or  distributing the software (or *
+// * any work based  on the software)  you  agree  to acknowledge its *
+// * use  in  resulting  scientific  publications,  and indicate your *
+// * acceptance of all terms of the Geant4 Software license.          *
+// ********************************************************************
+//
+// $Id: G4QIonIonElastic.cc,v 1.3 2008/10/02 21:10:07 dennis Exp $
+// GEANT4 tag $Name: geant4-09-02-ref-02 $
+//
+//      ---------------- G4QIonIonElastic class -----------------
+//                 by Mikhail Kossov, December 2006.
+// G4QIonIonElastic class of the CHIPS Simulation Branch in GEANT4
+// ---------------------------------------------------------------
+// ****************************************************************************************
+// ********** This CLASS is temporary moved from the photolepton_hadron directory *********
+// ****************************************************************************************
+
+//#define debug
+//#define pdebug
+//#define tdebug
+//#define nandebug
+//#define ppdebug
+
+#include "G4QIonIonElastic.hh"
+
+// Initialization of static vectors
+G4int G4QIonIonElastic::nPartCWorld=152;     // The#of particles initialized in CHIPS World
+std::vector<G4int> G4QIonIonElastic::ElementZ;        // Z of the element(i) in theLastCalc
+std::vector<G4double> G4QIonIonElastic::ElProbInMat;  // SumProbabilityElements in Material
+std::vector<std::vector<G4int>*> G4QIonIonElastic::ElIsoN; // N of isotope(j) of Element(i)
+std::vector<std::vector<G4double>*>G4QIonIonElastic::IsoProbInEl;//SumProbabIsotopes in ElI
+
+// Constructor
+G4QIonIonElastic::G4QIonIonElastic(const G4String& processName):
+  G4VDiscreteProcess(processName, fHadronic)
+{
+#ifdef debug
+  G4cout<<"G4QIonIonElastic::Constructor is called processName="<<processName<<G4endl;
+#endif
+  if (verboseLevel>0) G4cout << GetProcessName() << " process is created "<< G4endl;
+  SetProcessSubType(fHadronElastic);
+  //G4QCHIPSWorld::Get()->GetParticles(nPartCWorld); // Create CHIPS World (234 part. max)
+}
+
+// Destructor
+G4QIonIonElastic::~G4QIonIonElastic() {}
+
+// output of the function must be in units of length! L=1/sig_V,sig_V=SUM(n(j,i)*sig(j,i)),
+// where n(i,j) is a number of nuclei of the isotop j of the element i in V=1(lengtUnit^3)
+// ********** All CHIPS cross sections are calculated in the surface units ************
+G4double G4QIonIonElastic::GetMeanFreePath(const G4Track& aTrack, G4double,
+                                           G4ForceCondition* Fc)
+{
+  *Fc = NotForced;
+  const G4DynamicParticle* incidentParticle = aTrack.GetDynamicParticle();
+  G4ParticleDefinition* incidentParticleDefinition=incidentParticle->GetDefinition();
+  if( !IsApplicable(*incidentParticleDefinition))
+    G4cout<<"-Warning-G4QIonIonElastic::GetMeanFreePath: notImplementedParticle"<<G4endl;
+  // Calculate the mean Cross Section for the set of Elements(*Isotopes) in the Material
+  G4double Momentum = incidentParticle->GetTotalMomentum(); // 3-momentum of the Particle
+#ifdef debug
+  G4double KinEn = incidentParticle->GetKineticEnergy();
+  G4cout<<"G4QIonIonElastic::GetMeanFreePath: kinE="<<KinEn<<",Mom="<<Momentum<<G4endl;
+#endif
+  const G4Material* material = aTrack.GetMaterial();        // Get the current material
+  const G4double* NOfNucPerVolume = material->GetVecNbOfAtomsPerVolume();
+  const G4ElementVector* theElementVector = material->GetElementVector();
+  G4int nE=material->GetNumberOfElements();
+#ifdef debug
+  G4cout<<"G4QIonIonElastic::GetMeanFreePath:"<<nE<<" Elem's in theMaterial"<<G4endl;
+#endif
+  G4VQCrossSection* CSmanager=G4QIonIonCrossSection::GetPointer();
+  G4int pPDG=0;
+  // Probably enough: pPDG=incidentParticleDefinition->GetPDGEncoding();
+  if      ( incidentParticleDefinition ==  G4Deuteron::Deuteron()     ) pPDG = 100001002;
+  else if ( incidentParticleDefinition ==  G4Alpha::Alpha()           ) pPDG = 100002004;
+  else if ( incidentParticleDefinition ==  G4Triton::Triton()         ) pPDG = 100001003;
+  else if ( incidentParticleDefinition ==  G4He3::He3()               ) pPDG = 100002003;
+  else if ( incidentParticleDefinition ==  G4GenericIon::GenericIon() )
+  {
+    pPDG=incidentParticleDefinition->GetPDGEncoding();
+#ifdef debug
+    G4int B=incidentParticleDefinition->GetBaryonNumber();
+    G4int C=incidentParticleDefinition->GetPDGCharge();
+    prPDG=100000000+1000*C+B;
+    G4cout<<"G4QIonIonElastic::GetMeanFreePath: PDG="<<prPDG<<"="<<pPDG<<G4endl;
+#endif
+  }
+  else G4cout<<"-Warning-G4QIonIonElastic::GetMeanFreePath:Unknown projectile Ion"<<G4endl;
+  Momentum/=incidentParticleDefinition->GetBaryonNumber(); // Divide Mom by projectile A
+  G4QIsotope* Isotopes = G4QIsotope::Get(); // Pointer to the G4QIsotopes singleton
+  G4double sigma=0.;                        // Sums over elements for the material
+  G4int IPIE=IsoProbInEl.size();            // How many old elements?
+  if(IPIE) for(G4int ip=0; ip<IPIE; ++ip)   // Clean up the SumProb's of Isotopes (SPI)
+  {
+    std::vector<G4double>* SPI=IsoProbInEl[ip]; // Pointer to the SPI vector
+    SPI->clear();
+    delete SPI;
+    std::vector<G4int>* IsN=ElIsoN[ip];     // Pointer to the N vector
+    IsN->clear();
+    delete IsN;
+  }
+  ElProbInMat.clear();                      // Clean up the SumProb's of Elements (SPE)
+  ElementZ.clear();                         // Clear the body vector for Z of Elements
+  IsoProbInEl.clear();                      // Clear the body vector for SPI
+  ElIsoN.clear();                           // Clear the body vector for N of Isotopes
+  for(G4int i=0; i<nE; ++i)
+  {
+    G4Element* pElement=(*theElementVector)[i]; // Pointer to the current element
+    G4int Z = static_cast<G4int>(pElement->GetZ()); // Z of the Element
+    ElementZ.push_back(Z);                  // Remember Z of the Element
+    G4int isoSize=0;                        // The default for the isoVectorLength is 0
+    G4int indEl=0;                          // Index of non-natural element or 0(default)
+    G4IsotopeVector* isoVector=pElement->GetIsotopeVector(); // Get the predefined IsoVect
+    if(isoVector) isoSize=isoVector->size();// Get size of the existing isotopeVector
+#ifdef debug
+    G4cout<<"G4QIonIonElastic::GetMeanFreePath: isovectorLength="<<isoSize<<G4endl;
+#endif
+    if(isoSize)                             // The Element has non-trivial abundance set
+    {
+      indEl=pElement->GetIndex()+1;         // Index of the non-trivial element is an order
+#ifdef debug
+      G4cout<<"G4QIIEl::GetMFP:iE="<<indEl<<", def="<<Isotopes->IsDefined(Z,indEl)<<G4endl;
+#endif
+      if(!Isotopes->IsDefined(Z,indEl))     // This index is not defined for this Z: define
+      {
+        std::vector<std::pair<G4int,G4double>*>* newAbund =
+                                               new std::vector<std::pair<G4int,G4double>*>;
+        G4double* abuVector=pElement->GetRelativeAbundanceVector();
+        for(G4int j=0; j<isoSize; j++)      // Calculation of abundance vector for isotopes
+        {
+          G4int N=pElement->GetIsotope(j)->GetN()-Z; // N means A=N+Z !
+          if(pElement->GetIsotope(j)->GetZ()!=Z) G4cerr<<"G4QIonIonEl::GetMeanFreePath Z="
+                                         <<pElement->GetIsotope(j)->GetZ()<<"#"<<Z<<G4endl;
+          G4double abund=abuVector[j];
+								  std::pair<G4int,G4double>* pr= new std::pair<G4int,G4double>(N,abund);
+#ifdef debug
+          G4cout<<"G4QIonIonElastic::GetMeanFP:pair#="<<j<<",N="<<N<<",ab="<<abund<<G4endl;
+#endif
+          newAbund->push_back(pr);
+						  }
+#ifdef debug
+        G4cout<<"G4QIonIonElastic::GetMeanFP: pairVectorLength="<<newAbund->size()<<G4endl;
+#endif
+        indEl=G4QIsotope::Get()->InitElement(Z,indEl,newAbund); // definition of the newInd
+        for(G4int k=0; k<isoSize; k++) delete (*newAbund)[k];   // Cleaning temporary
+        delete newAbund; // Was "new" in the beginning of the name space
+      }
+    }
+    std::vector<std::pair<G4int,G4double>*>* cs= Isotopes->GetCSVector(Z,indEl);//CSPointer
+    std::vector<G4double>* SPI = new std::vector<G4double>; // Pointer to the SPI vector
+    IsoProbInEl.push_back(SPI);
+    std::vector<G4int>* IsN = new std::vector<G4int>; // Pointer to the N vector
+    ElIsoN.push_back(IsN);
+    G4int nIs=cs->size();                   // A#Of Isotopes in the Element
+#ifdef debug
+    G4cout<<"G4QIonIonEl::GetMFP:=***=> #isot="<<nIs<<", Z="<<Z<<", indEl="<<indEl<<G4endl;
+#endif
+    G4double susi=0.;                       // sum of CS over isotopes
+    if(nIs) for(G4int j=0; j<nIs; j++)      // Calculate CS for eachIsotope of El
+    {
+      std::pair<G4int,G4double>* curIs=(*cs)[j]; // A pointer, which is used twice
+      G4int N=curIs->first;                 // #of Neuterons in the isotope j of El i
+      IsN->push_back(N);                    // Remember Min N for the Element
+#ifdef debug
+      G4cout<<"G4QIIEl::GMFP:true,P="<<Momentum<<",Z="<<Z<<",N="<<N<<",PDG="<<pPDG<<G4endl;
+#endif
+		    G4bool ccsf=false;                    // Extract elastic Ion-Ion cross-section
+#ifdef debug
+      G4cout<<"G4QIonIonElastic::GMFP: GetCS #1 j="<<j<<G4endl;
+#endif
+      G4double CSI=CSmanager->GetCrossSection(ccsf,Momentum,Z,N,pPDG);//CS(j,i) for isotope
+#ifdef debug
+      G4cout<<"G4QIonIonElastic::GMFP: jI="<<j<<", Zt="<<Z<<", Nt="<<N<<", Mom="<<Momentum
+            <<", XSec="<<CSI/millibarn<<G4endl;
+#endif
+      curIs->second = CSI;
+      susi+=CSI;                            // Make a sum per isotopes
+      SPI->push_back(susi);                 // Remember summed cross-section
+    } // End of temporary initialization of the cross sections in the G4QIsotope singeltone
+    sigma+=Isotopes->GetMeanCrossSection(Z,indEl)*NOfNucPerVolume[i];//SUM(MeanCS*NOfNperV)
+#ifdef debug
+    G4cout<<"G4QIonIonEl::GMFP:<S>="<<Isotopes->GetMeanCrossSection(Z,indEl)<<",AddToSig="
+          <<Isotopes->GetMeanCrossSection(Z,indEl)*NOfNucPerVolume[i]<<G4endl;
+#endif
+    ElProbInMat.push_back(sigma);
+  } // End of LOOP over Elements
+  // Check that cross section is not zero and return the mean free path
+#ifdef debug
+  G4cout<<"G4QIonIonElastic::GetMeanFreePath: MeanFreePath="<<1./sigma<<G4endl;
+#endif
+  if(sigma > 0.) return 1./sigma;                 // Mean path [distance] 
+  return DBL_MAX;
+}
+
+
+G4bool G4QIonIonElastic::IsApplicable(const G4ParticleDefinition& particle) 
+{
+  if      (particle == *( G4Deuteron::Deuteron()     )) return true;
+  else if (particle == *( G4Alpha::Alpha()           )) return true;
+  else if (particle == *( G4Triton::Triton()         )) return true;
+  else if (particle == *( G4He3::He3()               )) return true;
+  else if (particle == *( G4GenericIon::GenericIon() )) return true;
+#ifdef debug
+  G4cout<<"***>>G4QIonIonElastic::IsApplicable: PDG="<<particle.GetPDGEncoding()<<G4endl;
+#endif
+  return false;
+}
+
+G4VParticleChange* G4QIonIonElastic::PostStepDoIt(const G4Track& track, const G4Step& step)
+{
+  static const G4double fm2MeV2 = 3*38938./1.09; // (3/1.09)*(hc)^2 in fm^2*MeV^2
+  static G4bool CWinit = true;                   // CHIPS Warld needs to be initted
+  if(CWinit)
+		{
+    CWinit=false;
+    G4QCHIPSWorld::Get()->GetParticles(nPartCWorld); // Create CHIPS World (234 part.max)
+  }
+  //-------------------------------------------------------------------------------------
+  const G4DynamicParticle* projHadron = track.GetDynamicParticle();
+  const G4ParticleDefinition* particle=projHadron->GetDefinition();
+#ifdef debug
+  G4cout<<"G4QIonIonElastic::PostStepDoIt: Before the GetMeanFreePath is called In4M="
+        <<projHadron->Get4Momentum()<<" of PDG="<<particle->GetPDGEncoding()<<", Type="
+        <<particle->GetParticleType()<<", Subtp="<<particle->GetParticleSubType()<<G4endl;
+#endif
+  //G4ForceCondition cond=NotForced;
+  //GetMeanFreePath(track, -27., &cond);                // @@ ?? jus to update parameters?
+#ifdef debug
+  G4cout<<"G4QIonIonElastic::PostStepDoIt: After the GetMeanFreePath is called"<<G4endl;
+#endif
+  G4LorentzVector proj4M=(projHadron->Get4Momentum())/MeV; // Convert to MeV!
+  G4LorentzVector scat4M=proj4M;                      // @@ Must be filled (?)
+  G4double momentum = projHadron->GetTotalMomentum()/MeV; // 3-momentum of the Proj in MeV
+  G4double Momentum = proj4M.rho();                   // @@ Just for the test purposes
+  if(std::fabs(Momentum-momentum)>.000001)
+    G4cerr<<"-Warn-G4QIonIonElastic::PostStepDoIt:P(IU)="<<Momentum<<"#"<<momentum<<G4endl;
+  G4double pM2=proj4M.m2();        // in MeV^2
+  G4double pM=std::sqrt(pM2);      // in MeV
+#ifdef pdebug
+  G4cout<<"G4QIonIonElastic::PostStepDoIt: pP(IU)="<<Momentum<<"="<<momentum<<",pM="<<pM
+        <<",scat4M="<<scat4M<<scat4M.m()<<G4endl;
+#endif
+  if (!IsApplicable(*particle))  // Check applicability
+  {
+    G4cerr<<"G4QIonIonElastic::PostStepDoIt: Only NA elastic is implemented."<<G4endl;
+    return 0;
+  }
+  const G4Material* material = track.GetMaterial();      // Get the current material
+  G4int Z=0;
+  const G4ElementVector* theElementVector = material->GetElementVector();
+  G4int nE=material->GetNumberOfElements();
+#ifdef debug
+  G4cout<<"G4QIonIonElastic::PostStepDoIt: "<<nE<<" elements in the material."<<G4endl;
+#endif
+  // Probably enough: projPDG=particle->GetPDGEncoding();
+  G4int projPDG=0;                           // CHIPS PDG Code for the captured hadron
+  if      (particle ==  G4Deuteron::Deuteron()     ) projPDG= 100001002;
+  else if (particle ==  G4Alpha::Alpha()           ) projPDG= 100002004;
+  else if (particle ==  G4Triton::Triton()         ) projPDG= 100001003;
+  else if (particle ==  G4He3::He3()               ) projPDG= 100002003;
+  else if (particle ==  G4GenericIon::GenericIon() )
+  {
+    projPDG=particle->GetPDGEncoding();
+#ifdef debug
+    G4int B=particle->GetBaryonNumber();
+    G4int C=particle->GetPDGCharge();
+    prPDG=100000000+1000*C+B;
+    G4cout<<"G4QIonIonElastic::PostStepDoIt: PDG="<<prPDG<<"="<<projPDG<<G4endl;
+#endif
+  }
+  else G4cout<<"-Warning-G4QIonIonElastic::PostStepDoIt:Unknown projectile Ion"<<G4endl;
+#ifdef debug
+  G4int prPDG=particle->GetPDGEncoding();
+		G4cout<<"G4QIonIonElastic::PostStepDoIt: projPDG="<<projPDG<<", stPDG="<<prPDG<<G4endl;
+#endif
+  if(!projPDG)
+  {
+    G4cerr<<"-Warning-G4QIonIonElastic::PostStepDoIt:Undefined interactingNucleus"<<G4endl;
+    return 0;
+  }
+  G4double pA=particle->GetBaryonNumber();     // Projectile A
+  G4double pZ=particle->GetPDGCharge();        // Projectile Z
+  G4double pN=pA-pZ;                           // Projectile N
+  G4int EPIM=ElProbInMat.size();
+#ifdef debug
+		G4cout<<"G4QIonIonElastic::PSDI:m="<<EPIM<<",n="<<nE<<",T="<<ElProbInMat[EPIM-1]<<G4endl;
+#endif
+  G4int i=0;
+  if(EPIM>1)
+  {
+    G4double rnd = ElProbInMat[EPIM-1]*G4UniformRand();
+    for(i=0; i<nE; ++i)
+		  {
+#ifdef debug
+				  G4cout<<"G4QIonIonElastic::PSDI: EPM["<<i<<"]="<<ElProbInMat[i]<<", r="<<rnd<<G4endl;
+#endif
+      if (rnd<ElProbInMat[i]) break;
+    }
+    if(i>=nE) i=nE-1;                        // Top limit for the Element
+  }
+  G4Element* pElement=(*theElementVector)[i];
+  Z=static_cast<G4int>(pElement->GetZ());
+#ifdef debug
+				G4cout<<"G4QIonIonElastic::PostStepDoIt: i="<<i<<", Z(element)="<<Z<<G4endl;
+#endif
+  if(Z<=0)
+  {
+    G4cerr<<"---Warning---G4QIonIonElastic::PostStepDoIt: Element with Z="<<Z<<G4endl;
+    if(Z<0) return 0;
+  }
+  std::vector<G4double>* SPI = IsoProbInEl[i];// Vector of summedProbabilities for isotopes
+  std::vector<G4int>* IsN = ElIsoN[i];     // Vector of "#of neutrons" in the isotope El[i]
+  G4int nofIsot=SPI->size();               // #of isotopes in the element i
+#ifdef debug
+		G4cout<<"G4QIonIonElastic::PosStDoIt: nI="<<nofIsot<<",T="<<(*SPI)[nofIsot-1]<<G4endl;
+#endif
+  G4int j=0;
+  if(nofIsot>1)
+  {
+    G4double rndI=(*SPI)[nofIsot-1]*G4UniformRand(); // Randomize the isotop of the Element
+    for(j=0; j<nofIsot; ++j)
+    {
+#ifdef debug
+				  G4cout<<"G4QIonIonElastic::PostStDI: SP["<<j<<"]="<<(*SPI)[j]<<", r="<<rndI<<G4endl;
+#endif
+      if(rndI < (*SPI)[j]) break;
+    }
+    if(j>=nofIsot) j=nofIsot-1;            // Top limit for the isotope
+  }
+  G4int N =(*IsN)[j]; ;                    // Randomized number of neutrons
+#ifdef debug
+		G4cout<<"G4QIonIonElastic::PostStepDoIt:j="<<i<<",N(isotope)="<<N<<", MeV="<<MeV<<G4endl;
+#endif
+  if(N<0)
+  {
+    G4cerr<<"-Warning-G4QIonIonElastic::PostStepDoIt:IsotopeZ="<<Z<<" has 0>N="<<N<<G4endl;
+    return 0;
+  }
+  nOfNeutrons=N;                           // Remember it for the energy-momentum check
+#ifdef debug
+  G4cout<<"G4QIonIonElastic::PostStepDoIt: N="<<N<<" for element with Z="<<Z<<G4endl;
+#endif
+  if(N<0)
+  {
+    G4cerr<<"-Warning-G4QIonIonElastic::PostStepDoIt:Element with N="<<N<< G4endl;
+    return 0;
+  }
+  aParticleChange.Initialize(track);
+#ifdef debug
+  G4cout<<"G4QIonIonElastic::PostStepDoIt: track is initialized"<<G4endl;
+#endif
+  G4double weight        = track.GetWeight();
+  G4double localtime     = track.GetGlobalTime();
+  G4ThreeVector position = track.GetPosition();
+#ifdef debug
+  G4cout<<"G4QIonIonElastic::PostStepDoIt: before Touchable extraction"<<G4endl;
+#endif
+  G4TouchableHandle trTouchable = track.GetTouchableHandle();
+#ifdef debug
+  G4cout<<"G4QIonIonElastic::PostStepDoIt: Touchable is extracted"<<G4endl;
+#endif
+  //
+  G4double tA=Z+N;
+  G4int targPDG=90000000+Z*1000+N;         // CHIPS PDG Code of the target nucleus
+  G4QPDGCode targQPDG(targPDG);            // @@ one can use G4Ion & get rid of CHIPS World
+  G4double tM=targQPDG.GetMass();          // CHIPS target mass in MeV
+  G4double kinEnergy= projHadron->GetKineticEnergy()*MeV; // Kin energy in MeV (Is *MeV n?)
+  G4ParticleMomentum dir = projHadron->GetMomentumDirection();// It is a unit three-vector
+  G4LorentzVector tot4M=proj4M+G4LorentzVector(0.,0.,0.,tM); // Total 4-mom of the reaction
+#ifdef debug
+  G4cout<<"G4QIonIonElastic::PostStDI: tM="<<tM<<", p4M="<<proj4M<<", t4M="<<tot4M<<G4endl;
+#endif
+  EnMomConservation=tot4M;                 // Total 4-mom of reaction for E/M conservation
+  G4VQCrossSection* ELmanager=G4QElasticCrossSection::GetPointer();
+  G4VQCrossSection* CSmanager=G4QIonIonCrossSection::GetPointer();
+  // @@ Probably this is not necessary any more
+#ifdef debug
+  G4cout<<"G4QIIEl::PSDI:false,P="<<Momentum<<",Z="<<Z<<",N="<<N<<",PDG="<<projPDG<<G4endl;
+#endif
+  // false means elastic cross-section
+  G4double xSec=CSmanager->GetCrossSection(false, Momentum, Z, N, projPDG);// Rec.CrossSect
+#ifdef debug
+  G4cout<<"G4QIIEl::PSDI: pPDG="<<projPDG<<",P="<<Momentum<<",CS="<<xSec/millibarn<<G4endl;
+#endif
+#ifdef nandebug
+  if(xSec>0. || xSec<0. || xSec==0);
+  else  G4cout<<"-NaN-Warning-G4QIonIonElastic::PostStDoIt: xSec="<<xSec/millibarn<<G4endl;
+#endif
+  // @@ check a possibility to separate p, n, or alpha (!)
+  if(xSec <= 0.) // The cross-section iz 0 -> Do Nothing
+  {
+#ifdef pdebug
+    G4cerr<<"-Warning-G4QIonIonElastic::PostStDoIt: *Zero cross-section* PDG="<<projPDG
+          <<",tPDG="<<targPDG<<",P="<<Momentum<<G4endl;
+#endif
+    //Do Nothing Action insead of the reaction
+    aParticleChange.ProposeEnergy(kinEnergy);
+    aParticleChange.ProposeLocalEnergyDeposit(0.);
+    aParticleChange.ProposeMomentumDirection(dir) ;
+    return G4VDiscreteProcess::PostStepDoIt(track,step);
+  }
+  G4double dtM=tM+tM;
+  G4double PA=Momentum*pA;
+  G4double PA2=PA*PA;
+  G4double maxt=dtM*PA2/(std::sqrt(PA2+pM2)+tM/2+pM2/dtM);
+#ifdef pdebug
+  G4cout<<"G4QIonIonElastic::PostStDoIt:pPDG="<<projPDG<<",tPDG="<<targPDG<<",P="<<Momentum
+        <<",CS="<<xSec<<",maxt="<<maxt<<G4endl;
+#endif
+  xSec=ELmanager->GetCrossSection(false, Momentum, 1, 0, 2212);// pp=nn
+  G4double B1=ELmanager->GetSlope(1,0,2212); // slope for pp=nn
+  xSec=ELmanager->GetCrossSection(false, Momentum, 1, 0, 2112);// np=pn
+  G4double B2 =ELmanager->GetSlope(1,0,2112); // slope for np=pn
+  G4double mB =((pZ*Z+pN*N)*B1+(pZ*N+pN*Z)*B2)/(pA+tA);
+  G4double pR2=std::pow(pA+4.,.305)/fm2MeV2;
+  G4double tR2=std::pow(tA+4.,.305)/fm2MeV2;
+  G4double eB =mB+pR2+tR2;
+  G4double mint=-std::log(1.-G4UniformRand()*(1.-std::exp(-eB*maxt)))/eB;
+#ifdef pdebug
+  G4cout<<"G4QIonIonElastic::PostStDoIt:B1="<<B1<<",B2="<<B2<<",mB="<<mB
+        <<",pR2="<<pR2<<",tR2="<<tR2<<",eB="<<eB<<",mint="<<mint<<G4endl;
+#endif
+#ifdef nandebug
+  if(mint>-.0000001);
+  else  G4cout<<"-Warning-G4QIonIonElastic::PostStDoIt:-t="<<mint<<G4endl;
+#endif
+  G4double cost=1.-(mint+mint)/maxt; // cos(theta) in CMS
+  // 
+#ifdef ppdebug
+  G4cout<<"G4QIonIonElastic::PoStDoI:t="<<mint<<",dpcm2="<<CSmanager->GetHMaxT()<<",Ek="
+        <<kinEnergy<<",tM="<<tM<<",pM="<<pM<<",cost="<<cost<<G4endl;
+#endif
+  if(cost>1. || cost<-1. || !(cost>-1. || cost<1.))
+  {
+    if(cost>1.000001 || cost<-1.000001 || !(cost>-1. || cost<1.))
+    {
+      G4double tM2=tM*tM;                         // Squared target mass
+      G4double pEn=pM+kinEnergy;                  // tot projectile Energy in MeV
+      G4double sM=dtM*pEn+tM2+pM2;                // Mondelstam s
+      G4double twop2cm=(tM2+tM2)*(pEn*pEn-pM2)/sM;// Max_t/2 (2*p^2_cm)
+      G4cout<<"-Warning-G4QIonIonElastic::PoStDI:cos="<<cost<<",t="<<mint<<",T="<<kinEnergy
+            <<",tM="<<tM<<",tmax="<<2*kinEnergy*tM<<",p="<<projPDG<<",t="<<targPDG<<G4endl;
+      G4cout<<"G4QIonIonElastic::PSDI:dpcm2="<<twop2cm<<"="<<CSmanager->GetHMaxT()<<G4endl;
+    }
+    if     (cost>1.)  cost=1.;
+    else if(cost<-1.) cost=-1.;
+  }
+  G4LorentzVector reco4M=G4LorentzVector(0.,0.,0.,tM);      // 4mom of the recoil target
+  G4LorentzVector dir4M=tot4M-G4LorentzVector(0.,0.,0.,(tot4M.e()-tM-pM)*.01);
+  if(!G4QHadron(tot4M).RelDecayIn2(scat4M, reco4M, dir4M, cost, cost))
+  {
+    G4cerr<<"G4QIonIonE::PSDI:t4M="<<tot4M<<",pM="<<pM<<",tM="<<tM<<",cost="<<cost<<G4endl;
+  }
+#ifdef debug
+  G4cout<<"G4QIonIonElast::PSDI:s4M="<<scat4M<<"+r4M="<<reco4M<<"="<<scat4M+reco4M<<G4endl;
+  G4cout<<"G4QIonIonElastic::PSDI:scatE="<<scat4M.e()-pM<<",recoE="<<reco4M.e()-tM<<",d4M="
+        <<tot4M-scat4M-reco4M<<G4endl;
+#endif
+  // Update G4VParticleChange for the scattered projectile
+  G4double finE=scat4M.e()-pM;             // Final kinetic energy of the scattered proton
+  if(finE>0.0) aParticleChange.ProposeEnergy(finE);
+  else
+  {
+    if(finE<-1.e-8 || !(finE>-1.||finE<1.)) // NAN or negative
+      G4cerr<<"*Warning*G4QIonIonElastic::PostStDoIt: Zero or negative scattered E="<<finE
+            <<", s4M="<<scat4M<<", r4M="<<reco4M<<", d4M="<<tot4M-scat4M-reco4M<<G4endl;
+    aParticleChange.ProposeEnergy(0.) ;
+    aParticleChange.ProposeTrackStatus(fStopButAlive);
+  }
+  G4ThreeVector findir=scat4M.vect()/scat4M.rho();  // Unit vector in new direction
+  aParticleChange.ProposeMomentumDirection(findir); // new direction for the scattered part
+  EnMomConservation-=scat4M;                        // It must be initialized by (pE+tM,pP)
+  // This is how in general the secondary should be identified
+		G4DynamicParticle* theSec = new G4DynamicParticle; // A secondary for the recoil hadron 
+  G4int aA = Z+N;
+#ifdef pdebug
+		G4cout<<"G4QIonIonElastic::PostStepDoIt: Ion Z="<<Z<<", A="<<aA<<G4endl;
+#endif
+  G4ParticleDefinition* theDefinition=G4ParticleTable::GetParticleTable()
+                                                                       ->FindIon(Z,aA,0,Z);
+  if(!theDefinition)G4cout<<"-Warning-G4QIonIonElastic::PoStDI:drop PDG="<<targPDG<<G4endl;
+#ifdef pdebug
+  G4cout<<"G4QIonIonElastic::PoStDI:RecoilName="<<theDefinition->GetParticleName()<<G4endl;
+#endif
+  theSec->SetDefinition(theDefinition);
+
+  EnMomConservation-=reco4M;
+#ifdef tdebug
+  G4cout<<"G4QIonIonElastic::PSD:"<<targPDG<<reco4M<<reco4M.m()<<EnMomConservation<<G4endl;
+#endif
+  theSec->Set4Momentum(reco4M);
+#ifdef debug
+  G4ThreeVector curD=theSec->GetMomentumDirection();
+  G4double curM=theSec->GetMass();
+  G4double curE=theSec->GetKineticEnergy()+curM;
+  G4cout<<"G4QIonIonElastic::PSDI: p="<<curD<<curD.mag()<<",e="<<curE<<",m="<<curM<<G4endl;
+#endif
+  // Make a recoil nucleus
+  G4Track* aNewTrack = new G4Track(theSec, localtime, position );
+  aNewTrack->SetWeight(weight);                                   //    weighted
+  aNewTrack->SetTouchableHandle(trTouchable);
+  aParticleChange.AddSecondary( aNewTrack );
+#ifdef debug
+    G4cout<<"G4QIonIonElastic::PostStepDoIt: **** PostStepDoIt is done ****"<<G4endl;
+#endif
+  return G4VDiscreteProcess::PostStepDoIt(track, step);
+}
