G4HadronicProcess.cc

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// $Id: G4HadronicProcess.cc 93817 2015-11-02 11:33:26Z gcosmo $
//
// -------------------------------------------------------------------
//
// GEANT4 Class source file
//
// G4HadronicProcess
//
// original by H.P.Wellisch
// J.L. Chuma, TRIUMF, 10-Mar-1997
//
// Modifications:
// 05-Jul-2010 V.Ivanchenko cleanup commented lines
// 20-Jul-2011 M.Kelsey -- null-pointer checks in DumpState()
// 24-Sep-2011 M.Kelsey -- Use envvar G4HADRONIC_RANDOM_FILE to save random
//              engine state before each model call
// 18-Oct-2011 M.Kelsey -- Handle final-state cases in conservation checks.
// 14-Mar-2012 G.Folger -- enhance checks for conservation of energy, etc.
// 28-Jul-2012 M.Maire  -- add function GetTargetDefinition() 
// 14-Sep-2012 Inherit from RestDiscrete, use subtype code (now in ctor) to
//              configure base-class
// 28-Sep-2012 Restore inheritance from G4VDiscreteProcess, remove enable-flag
//              changing, remove warning message from original ctor.

#include "G4HadronicProcess.hh"

#include "G4Types.hh"
#include "G4SystemOfUnits.hh"
#include "G4HadProjectile.hh"
#include "G4ElementVector.hh"
#include "G4Track.hh"
#include "G4Step.hh"
#include "G4Element.hh"
#include "G4ParticleChange.hh"
#include "G4TransportationManager.hh"
#include "G4Navigator.hh"
#include "G4ProcessVector.hh"
#include "G4ProcessManager.hh"
#include "G4StableIsotopes.hh"
#include "G4HadTmpUtil.hh"
#include "G4NucleiProperties.hh"

#include "G4HadronicException.hh"
#include "G4HadronicProcessStore.hh"

#include "G4AutoLock.hh"
#include "G4NistManager.hh"

#include <typeinfo>
#include <sstream>
#include <iostream>

#include <stdlib.h>

// File-scope variable to capture environment variable at startup

static const char* G4Hadronic_Random_File = getenv("G4HADRONIC_RANDOM_FILE");


G4HadronicProcess::G4HadronicProcess(const G4String& processName,
                                     G4ProcessType procType)
 : G4VDiscreteProcess(processName, procType)
{
  SetProcessSubType(fHadronInelastic);  // Default unless subclass changes
  
  theTotalResult = new G4ParticleChange();
  theTotalResult->SetSecondaryWeightByProcess(true);
  theInteraction = 0;
  theCrossSectionDataStore = new G4CrossSectionDataStore();
  theProcessStore = G4HadronicProcessStore::Instance();
  theProcessStore->Register(this);
  theInitialNumberOfInteractionLength = 0.0;
  aScaleFactor = 1;
  xBiasOn = false;
  theLastCrossSection = 0.0;
  G4HadronicProcess_debug_flag = false;
  GetEnergyMomentumCheckEnvvars();
}


G4HadronicProcess::G4HadronicProcess(const G4String& processName,
                                     G4HadronicProcessType aHadSubType)
 : G4VDiscreteProcess(processName, fHadronic)
{
  SetProcessSubType(aHadSubType);

  theTotalResult = new G4ParticleChange();
  theTotalResult->SetSecondaryWeightByProcess(true);
  theInteraction = 0;
  theCrossSectionDataStore = new G4CrossSectionDataStore();
  theProcessStore = G4HadronicProcessStore::Instance();
  theProcessStore->Register(this);
  theInitialNumberOfInteractionLength = 0.0;
  aScaleFactor = 1;
  xBiasOn = false;
  theLastCrossSection = 0.0;
  G4HadronicProcess_debug_flag = false;
  GetEnergyMomentumCheckEnvvars();
}


G4HadronicProcess::~G4HadronicProcess()
{
  theProcessStore->DeRegister(this);
  delete theTotalResult;
  delete theCrossSectionDataStore;
}

void G4HadronicProcess::GetEnergyMomentumCheckEnvvars() {
  levelsSetByProcess = false;

  epReportLevel = getenv("G4Hadronic_epReportLevel") ?
    strtol(getenv("G4Hadronic_epReportLevel"),0,10) : 0;

  epCheckLevels.first = getenv("G4Hadronic_epCheckRelativeLevel") ?
    strtod(getenv("G4Hadronic_epCheckRelativeLevel"),0) : DBL_MAX;

  epCheckLevels.second = getenv("G4Hadronic_epCheckAbsoluteLevel") ?
    strtod(getenv("G4Hadronic_epCheckAbsoluteLevel"),0) : DBL_MAX;
}

void G4HadronicProcess::RegisterMe( G4HadronicInteraction *a )
{
  if(!a) { return; }
  try{ theEnergyRangeManager.RegisterMe( a ); }
  catch(G4HadronicException & aE)
  {
    G4ExceptionDescription ed;
    aE.Report(ed);
    ed << "Unrecoverable error in " << GetProcessName()
       << " to register " << a->GetModelName() << G4endl;
    G4Exception("G4HadronicProcess::RegisterMe", "had001", FatalException,
                ed);
  }
  G4HadronicProcessStore::Instance()->RegisterInteraction(this, a);
}

G4double G4HadronicProcess::GetElementCrossSection(const G4DynamicParticle * part,
                                                   const G4Element * elm, 
                                                   const G4Material* mat)
{
  G4Material* aMaterial = const_cast<G4Material*>(mat);
  if(! mat) 
  {
    // Because NeutronHP needs a material pointer (for instance to get the
    // temperature), we ask the Nist manager to build or find a simple material
    // from the (integer) Z of the element. 
    // Note that repeated calls to this method are not producing multiple copies
    // of the same material. But it needs to be protected against race conditions
    // between different threads.
    aMaterial = InitialiseMaterial(G4int(elm->GetZ()));
  }
  G4double x = theCrossSectionDataStore->GetCrossSection(part, elm, aMaterial);
  if(x < 0.0) { x = 0.0; }
  return x;
}


namespace { G4Mutex hadronicProcessMutex = G4MUTEX_INITIALIZER; }
G4Material* G4HadronicProcess::InitialiseMaterial(G4int Z)
{
  G4AutoLock l(&hadronicProcessMutex);
  return G4NistManager::Instance()->FindOrBuildSimpleMaterial(Z);
}


void G4HadronicProcess::PreparePhysicsTable(const G4ParticleDefinition& p)
{
  if(getenv("G4HadronicProcess_debug")) {
    G4HadronicProcess_debug_flag = true;
  }
  theProcessStore->RegisterParticle(this, &p);
}

void G4HadronicProcess::BuildPhysicsTable(const G4ParticleDefinition& p)
{
  try
  {
    theCrossSectionDataStore->BuildPhysicsTable(p);
    theEnergyRangeManager.BuildPhysicsTable(p);
  }
  catch(G4HadronicException aR)
  {
    G4ExceptionDescription ed;
    aR.Report(ed);
    ed << " hadronic initialisation fails" << G4endl;
    G4Exception("G4HadronicProcess::BuildPhysicsTable", "had000", 
                FatalException,ed);
  }
  G4HadronicProcessStore::Instance()->PrintInfo(&p);
}

G4double G4HadronicProcess::
GetMeanFreePath(const G4Track &aTrack, G4double, G4ForceCondition *)
{
  //G4cout << "GetMeanFreePath " << aTrack.GetDefinition()->GetParticleName()
  //     << " Ekin= " << aTrack.GetKineticEnergy() << G4endl;
  try
  {
    theLastCrossSection = aScaleFactor*
      theCrossSectionDataStore->GetCrossSection(aTrack.GetDynamicParticle(),
                                                aTrack.GetMaterial());
  }
  catch(G4HadronicException aR)
  {
    G4ExceptionDescription ed;
    aR.Report(ed);
    DumpState(aTrack,"GetMeanFreePath",ed);
    ed << " Cross section is not available" << G4endl;
    G4Exception("G4HadronicProcess::GetMeanFreePath", "had002", FatalException,
                ed);
  }
  G4double res = DBL_MAX;
  if( theLastCrossSection > 0.0 ) { res = 1.0/theLastCrossSection; }
  //G4cout << "         xsection= " << res << G4endl;
  return res;
}

G4VParticleChange*
G4HadronicProcess::PostStepDoIt(const G4Track& aTrack, const G4Step&)
{
  //G4cout << "PostStepDoIt " << aTrack.GetDefinition()->GetParticleName()
  //     << " Ekin= " << aTrack.GetKineticEnergy() << G4endl;
  // if primary is not Alive then do nothing
  theTotalResult->Clear();
  theTotalResult->Initialize(aTrack);
  theTotalResult->ProposeWeight(aTrack.GetWeight());
  if(aTrack.GetTrackStatus() != fAlive) { return theTotalResult; }

  // Find cross section at end of step and check if <= 0
  //
  const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
  G4Material* aMaterial = aTrack.GetMaterial();

  G4Element* anElement = 0;
  try
  {
     anElement = theCrossSectionDataStore->SampleZandA(aParticle,
                                                       aMaterial,
                                                       targetNucleus);
  }
  catch(G4HadronicException & aR)
  {
    G4ExceptionDescription ed;
    aR.Report(ed);
    DumpState(aTrack,"SampleZandA",ed);
    ed << " PostStepDoIt failed on element selection" << G4endl;
    G4Exception("G4HadronicProcess::PostStepDoIt", "had003", FatalException,
                ed);
  }

  // check only for charged particles
  if(aParticle->GetDefinition()->GetPDGCharge() != 0.0) {
    if (GetElementCrossSection(aParticle, anElement, aMaterial) <= 0.0) {
      // No interaction
      return theTotalResult;
    }    
  }

  // Next check for illegal track status
  //
  if (aTrack.GetTrackStatus() != fAlive && 
      aTrack.GetTrackStatus() != fSuspend) {
    if (aTrack.GetTrackStatus() == fStopAndKill ||
        aTrack.GetTrackStatus() == fKillTrackAndSecondaries ||
        aTrack.GetTrackStatus() == fPostponeToNextEvent) {
      G4ExceptionDescription ed;
      ed << "G4HadronicProcess: track in unusable state - "
         << aTrack.GetTrackStatus() << G4endl;
      ed << "G4HadronicProcess: returning unchanged track " << G4endl;
      DumpState(aTrack,"PostStepDoIt",ed);
      G4Exception("G4HadronicProcess::PostStepDoIt", "had004", JustWarning, ed);
    }
    // No warning for fStopButAlive which is a legal status here
    return theTotalResult;
  }

  // Initialize the hadronic projectile from the track
  thePro.Initialise(aTrack);

  try
  {
    theInteraction =
      ChooseHadronicInteraction( thePro, targetNucleus, aMaterial, anElement );
  }
  catch(G4HadronicException & aE)
  {
    G4ExceptionDescription ed;
    aE.Report(ed);
    ed << "Target element "<<anElement->GetName()<<"  Z= "
       << targetNucleus.GetZ_asInt() << "  A= "
       << targetNucleus.GetA_asInt() << G4endl;
    DumpState(aTrack,"ChooseHadronicInteraction",ed);
    ed << " No HadronicInteraction found out" << G4endl;
    G4Exception("G4HadronicProcess::PostStepDoIt", "had005", FatalException,
                ed);
  }

  G4HadFinalState* result = 0;
  G4int reentryCount = 0;

  do
  {
    try
    {
      // Save random engine if requested for debugging
      if (G4Hadronic_Random_File) {
         CLHEP::HepRandom::saveEngineStatus(G4Hadronic_Random_File);
      }
      // Call the interaction
      result = theInteraction->ApplyYourself( thePro, targetNucleus);
      ++reentryCount;
    }
    catch(G4HadronicException aR)
    {
      G4ExceptionDescription ed;
      aR.Report(ed);
      ed << "Call for " << theInteraction->GetModelName() << G4endl;
      ed << "Target element "<<anElement->GetName()<<"  Z= "
         << targetNucleus.GetZ_asInt()
         << "  A= " << targetNucleus.GetA_asInt() << G4endl;
      DumpState(aTrack,"ApplyYourself",ed);
      ed << " ApplyYourself failed" << G4endl;
      G4Exception("G4HadronicProcess::PostStepDoIt", "had006", FatalException,
                  ed);
    }

    // Check the result for catastrophic energy non-conservation
    CheckResult(thePro, targetNucleus, result);

    if(reentryCount>100) {
      G4ExceptionDescription ed;
      ed << "Call for " << theInteraction->GetModelName() << G4endl;
      ed << "Target element "<<anElement->GetName()<<"  Z= "
         << targetNucleus.GetZ_asInt()
         << "  A= " << targetNucleus.GetA_asInt() << G4endl;
      DumpState(aTrack,"ApplyYourself",ed);
      ed << " ApplyYourself does not completed after 100 attempts" << G4endl;
      G4Exception("G4HadronicProcess::PostStepDoIt", "had006", FatalException,
                  ed);
    }
  }
  while(!result);  /* Loop checking, 30-Oct-2015, G.Folger */

  result->SetTrafoToLab(thePro.GetTrafoToLab());

  ClearNumberOfInteractionLengthLeft();

  FillResult(result, aTrack);

  if (epReportLevel != 0) {
    CheckEnergyMomentumConservation(aTrack, targetNucleus);
  }
  //G4cout << "PostStepDoIt done " << G4endl;
  return theTotalResult;
}


void G4HadronicProcess::ProcessDescription(std::ostream& outFile) const
{
  outFile << "The description for this process has not been written yet.\n";
}


G4double G4HadronicProcess::XBiasSurvivalProbability()
{
  G4double result = 0;
  G4double nLTraversed = GetTotalNumberOfInteractionLengthTraversed();
  G4double biasedProbability = 1.-std::exp(-nLTraversed);
  G4double realProbability = 1-std::exp(-nLTraversed/aScaleFactor);
  result = (biasedProbability-realProbability)/biasedProbability;
  return result;
}

G4double G4HadronicProcess::XBiasSecondaryWeight()
{
  G4double result = 0;
  G4double nLTraversed = GetTotalNumberOfInteractionLengthTraversed();
  result =
     1./aScaleFactor*std::exp(-nLTraversed/aScaleFactor*(1-1./aScaleFactor));
  return result;
}

void
G4HadronicProcess::FillResult(G4HadFinalState * aR, const G4Track & aT)
{
  theTotalResult->ProposeLocalEnergyDeposit(aR->GetLocalEnergyDeposit());

  G4double rotation = CLHEP::twopi*G4UniformRand();
  G4ThreeVector it(0., 0., 1.);

  G4double efinal = aR->GetEnergyChange();
  if(efinal < 0.0) { efinal = 0.0; }

  // check status of primary
  if(aR->GetStatusChange() == stopAndKill) {
    theTotalResult->ProposeTrackStatus(fStopAndKill);
    theTotalResult->ProposeEnergy( 0.0 );

    // check its final energy
  } else if(0.0 == efinal) {
    theTotalResult->ProposeEnergy( 0.0 );
    if(aT.GetParticleDefinition()->GetProcessManager()
       ->GetAtRestProcessVector()->size() > 0)
         { theTotalResult->ProposeTrackStatus(fStopButAlive); }
    else { theTotalResult->ProposeTrackStatus(fStopAndKill); }

    // primary is not killed apply rotation and Lorentz transformation
  } else  {
    theTotalResult->ProposeTrackStatus(fAlive);
    G4double mass = aT.GetParticleDefinition()->GetPDGMass();
    G4double newE = efinal + mass;
    G4double newP = std::sqrt(efinal*(efinal + 2*mass));
    G4ThreeVector newPV = newP*aR->GetMomentumChange();
    G4LorentzVector newP4(newE, newPV);
    newP4.rotate(rotation, it);
    newP4 *= aR->GetTrafoToLab();
    theTotalResult->ProposeMomentumDirection(newP4.vect().unit());
    newE = newP4.e() - mass;
    if(G4HadronicProcess_debug_flag && newE <= 0.0) {
      G4ExceptionDescription ed;
      DumpState(aT,"Primary has zero energy after interaction",ed);
      G4Exception("G4HadronicProcess::FillResults", "had011", JustWarning, ed);
    }
    if(newE < 0.0) { newE = 0.0; }
    theTotalResult->ProposeEnergy( newE );
  }
  //G4cout << "FillResult: Efinal= " << efinal << " status= " 
  //     << theTotalResult->GetTrackStatus() 
  //     << "  fKill= " << fStopAndKill << G4endl;

  // check secondaries: apply rotation and Lorentz transformation
  G4int nSec = aR->GetNumberOfSecondaries();
  theTotalResult->SetNumberOfSecondaries(nSec);
  G4double weight = aT.GetWeight();

  if (nSec > 0) {
    G4double time0 = aT.GetGlobalTime();
    for (G4int i = 0; i < nSec; ++i) {
      G4LorentzVector theM = aR->GetSecondary(i)->GetParticle()->Get4Momentum();
      theM.rotate(rotation, it);
      theM *= aR->GetTrafoToLab();
      aR->GetSecondary(i)->GetParticle()->Set4Momentum(theM);

      // time of interaction starts from zero
      G4double time = aR->GetSecondary(i)->GetTime();
      if (time < 0.0) { time = 0.0; }

      // take into account global time
      time += time0;

      G4Track* track = new G4Track(aR->GetSecondary(i)->GetParticle(),
                                   time, aT.GetPosition());
      track->SetCreatorModelIndex(aR->GetSecondary(i)->GetCreatorModelType());
      G4double newWeight = weight*aR->GetSecondary(i)->GetWeight();
        // G4cout << "#### ParticleDebug "
        // <<GetProcessName()<<" "
        //<<aR->GetSecondary(i)->GetParticle()->GetDefinition()->GetParticleName()<<" "
        // <<aScaleFactor<<" "
        // <<XBiasSurvivalProbability()<<" "
        // <<XBiasSecondaryWeight()<<" "
        // <<aT.GetWeight()<<" "
        // <<aR->GetSecondary(i)->GetWeight()<<" "
        // <<aR->GetSecondary(i)->GetParticle()->Get4Momentum()<<" "
        // <<G4endl;
      track->SetWeight(newWeight);
      track->SetTouchableHandle(aT.GetTouchableHandle());
      theTotalResult->AddSecondary(track);
      if (G4HadronicProcess_debug_flag) {
        G4double e = track->GetKineticEnergy();
        if (e <= 0.0) {
          G4ExceptionDescription ed;
          DumpState(aT,"Secondary has zero energy",ed);
          ed << "Secondary " << track->GetDefinition()->GetParticleName()
             << G4endl;
          G4Exception("G4HadronicProcess::FillResults", "had011", 
                      JustWarning,ed);
        }
      }
    }
  }

  aR->Clear();
}

void G4HadronicProcess::BiasCrossSectionByFactor(G4double aScale)
{
  xBiasOn = true;
  aScaleFactor = aScale;
  G4String it = GetProcessName();
  if ((it != "photonNuclear") &&
      (it != "electronNuclear") &&
      (it != "positronNuclear") ) {
    G4ExceptionDescription ed;
    G4Exception("G4HadronicProcess::BiasCrossSectionByFactor", "had009", 
                FatalException, ed,
                "Cross-section biasing available only for gamma and electro nuclear reactions.");
  }

  if (aScale < 100) {
    G4ExceptionDescription ed;
    G4Exception("G4HadronicProcess::BiasCrossSectionByFactor", "had010", JustWarning,ed,
                "Cross-section bias readjusted to be above safe limit. New value is 100");
    aScaleFactor = 100.;
  }
}

G4HadFinalState* G4HadronicProcess::CheckResult(const G4HadProjectile & aPro,
                                                const G4Nucleus &aNucleus, 
                                                G4HadFinalState * result)
{
  // check for catastrophic energy non-conservation
  // to re-sample the interaction

  G4HadronicInteraction * theModel = GetHadronicInteraction();
  G4double nuclearMass(0);
  if (theModel) {

    // Compute final-state total energy
    G4double finalE(0.);
    G4int nSec = result->GetNumberOfSecondaries();

    nuclearMass = G4NucleiProperties::GetNuclearMass(aNucleus.GetA_asInt(),
                                                     aNucleus.GetZ_asInt());
    if (result->GetStatusChange() != stopAndKill) {
      // Interaction didn't complete, returned "do nothing" state 
      // and reset nucleus or the primary survived the interaction 
      // (e.g. electro-nuclear ) => keep  nucleus
      finalE=result->GetLocalEnergyDeposit() +
             aPro.GetDefinition()->GetPDGMass() + result->GetEnergyChange();
      if( nSec == 0 ){
         // Since there are no secondaries, there is no recoil nucleus.
         // To check energy balance we must neglect the initial nucleus too.
        nuclearMass=0.0;
      }
    }
    for (G4int i = 0; i < nSec; i++) {
      G4DynamicParticle *pdyn=result->GetSecondary(i)->GetParticle();
      finalE += pdyn->GetTotalEnergy();
      G4double mass_pdg=pdyn->GetDefinition()->GetPDGMass();
      G4double mass_dyn=pdyn->GetMass();
      if ( std::abs(mass_pdg - mass_dyn) > 0.1*mass_pdg + 1.*MeV){
          result->Clear();
          result = 0;
          G4ExceptionDescription desc;
          desc << "Warning: Secondary with off-shell dynamic mass detected:  " << G4endl
           << " " << pdyn->GetDefinition()->GetParticleName()
           << ", PDG mass: " << mass_pdg << ", dynamic mass: "<< mass_dyn << G4endl
           << (epReportLevel<0 ? "abort the event" :  "re-sample the interaction") << G4endl
           << " Process / Model: " <<  GetProcessName()<< " / "
           << theModel->GetModelName() << G4endl
           << " Primary: " << aPro.GetDefinition()->GetParticleName()
           << " (" << aPro.GetDefinition()->GetPDGEncoding() << "), "
           << " E= " <<  aPro.Get4Momentum().e()
           << ", target nucleus (" << aNucleus.GetZ_asInt() << ", "
           << aNucleus.GetA_asInt() << ")" << G4endl;
          G4Exception("G4HadronicProcess:CheckResult()", "had012",
                  epReportLevel<0 ? EventMustBeAborted : JustWarning,desc);
          // must return here.....
          return result;
      }
    }
    G4double deltaE= nuclearMass +  aPro.GetTotalEnergy() -  finalE;

    std::pair<G4double, G4double> checkLevels = 
      theModel->GetFatalEnergyCheckLevels();    // (relative, absolute)
    if (std::abs(deltaE) > checkLevels.second && 
        std::abs(deltaE) > checkLevels.first*aPro.GetKineticEnergy()){
      // do not delete result, this is a pointer to a data member;
      result->Clear();
      result = 0;
      G4ExceptionDescription desc;
      desc << "Warning: Bad energy non-conservation detected, will "
           << (epReportLevel<0 ? "abort the event" :  "re-sample the interaction") << G4endl
           << " Process / Model: " <<  GetProcessName()<< " / " 
           << theModel->GetModelName() << G4endl
           << " Primary: " << aPro.GetDefinition()->GetParticleName()
           << " (" << aPro.GetDefinition()->GetPDGEncoding() << "), "
           << " E= " <<  aPro.Get4Momentum().e()
           << ", target nucleus (" << aNucleus.GetZ_asInt() << ", "
           << aNucleus.GetA_asInt() << ")" << G4endl
           << " E(initial - final) = " << deltaE << " MeV." << G4endl;
      G4Exception("G4HadronicProcess:CheckResult()", "had012", 
                  epReportLevel<0 ? EventMustBeAborted : JustWarning,desc);
    }
  }
  return result;
}

void
G4HadronicProcess::CheckEnergyMomentumConservation(const G4Track& aTrack,
                                                   const G4Nucleus& aNucleus)
{
  G4int target_A=aNucleus.GetA_asInt();
  G4int target_Z=aNucleus.GetZ_asInt();
  G4double targetMass = G4NucleiProperties::GetNuclearMass(target_A,target_Z);
  G4LorentzVector target4mom(0, 0, 0, targetMass);

  G4LorentzVector projectile4mom = aTrack.GetDynamicParticle()->Get4Momentum();
  G4int track_A = aTrack.GetDefinition()->GetBaryonNumber();
  G4int track_Z = G4lrint(aTrack.GetDefinition()->GetPDGCharge());

  G4int initial_A = target_A + track_A;
  G4int initial_Z = target_Z + track_Z;

  G4LorentzVector initial4mom = projectile4mom + target4mom;

  // Compute final-state momentum for scattering and "do nothing" results
  G4LorentzVector final4mom;
  G4int final_A(0), final_Z(0);

  G4int nSec = theTotalResult->GetNumberOfSecondaries();
  if (theTotalResult->GetTrackStatus() != fStopAndKill) {  // If it is Alive
     // Either interaction didn't complete, returned "do nothing" state
     //  or    the primary survived the interaction (e.g. electro-nucleus )
     G4Track temp(aTrack);

     // Use the final energy / momentum
     temp.SetMomentumDirection(*theTotalResult->GetMomentumDirection());
     temp.SetKineticEnergy(theTotalResult->GetEnergy());

     if( nSec == 0 ){
        // Interaction didn't complete, returned "do nothing" state
        //   - or suppressed recoil  (e.g. Neutron elastic )
        final4mom = temp.GetDynamicParticle()->Get4Momentum() + target4mom;
        final_A = initial_A;
        final_Z = initial_Z;
     }else{
        // The primary remains in final state (e.g. electro-nucleus )
        final4mom = temp.GetDynamicParticle()->Get4Momentum();
        final_A = track_A;
        final_Z = track_Z;
        // Expect that the target nucleus will have interacted,
        //  and its products, including recoil, will be included in secondaries.
     }
  }
  if( nSec > 0 ) {
    G4Track* sec;

    for (G4int i = 0; i < nSec; i++) {
      sec = theTotalResult->GetSecondary(i);
      final4mom += sec->GetDynamicParticle()->Get4Momentum();
      final_A += sec->GetDefinition()->GetBaryonNumber();
      final_Z += G4lrint(sec->GetDefinition()->GetPDGCharge());
    }
  }

  // Get level-checking information (used to cut-off relative checks)
  G4String processName = GetProcessName();
  G4HadronicInteraction* theModel = GetHadronicInteraction();
  G4String modelName("none");
  if (theModel) modelName = theModel->GetModelName();
  std::pair<G4double, G4double> checkLevels = epCheckLevels;
  if (!levelsSetByProcess) {
    if (theModel) checkLevels = theModel->GetEnergyMomentumCheckLevels();
    checkLevels.first= std::min(checkLevels.first,  epCheckLevels.first);
    checkLevels.second=std::min(checkLevels.second, epCheckLevels.second);
  }

  // Compute absolute total-energy difference, and relative kinetic-energy
  G4bool checkRelative = (aTrack.GetKineticEnergy() > checkLevels.second);

  G4LorentzVector diff = initial4mom - final4mom;
  G4double absolute = diff.e();
  G4double relative = checkRelative ? absolute/aTrack.GetKineticEnergy() : 0.;

  G4double absolute_mom = diff.vect().mag();
  G4double relative_mom = checkRelative ? absolute_mom/aTrack.GetMomentum().mag() : 0.;

  // Evaluate relative and absolute conservation
  G4bool relPass = true;
  G4String relResult = "pass";
  if (  std::abs(relative) > checkLevels.first
         || std::abs(relative_mom) > checkLevels.first) {
    relPass = false;
    relResult = checkRelative ? "fail" : "N/A";
  }

  G4bool absPass = true;
  G4String absResult = "pass";
  if (   std::abs(absolute) > checkLevels.second
      || std::abs(absolute_mom) > checkLevels.second ) {
    absPass = false ;
    absResult = "fail";
  }

  G4bool chargePass = true;
  G4String chargeResult = "pass";
  if (   (initial_A-final_A)!=0
      || (initial_Z-final_Z)!=0 ) {
    chargePass = checkLevels.second < DBL_MAX ? false : true;
    chargeResult = "fail";
   }

  G4bool conservationPass = (relPass || absPass) && chargePass;

  std::stringstream Myout;
  G4bool Myout_notempty(false);
  // Options for level of reporting detail:
  //  0. off
  //  1. report only when E/p not conserved
  //  2. report regardless of E/p conservation
  //  3. report only when E/p not conserved, with model names, process names, and limits
  //  4. report regardless of E/p conservation, with model names, process names, and limits
  //  negative -1.., as above, but send output to stderr

  if(   std::abs(epReportLevel) == 4
        ||      ( std::abs(epReportLevel) == 3 && ! conservationPass ) ){
      Myout << " Process: " << processName << " , Model: " <<  modelName << G4endl;
      Myout << " Primary: " << aTrack.GetParticleDefinition()->GetParticleName()
            << " (" << aTrack.GetParticleDefinition()->GetPDGEncoding() << "),"
            << " E= " <<  aTrack.GetDynamicParticle()->Get4Momentum().e()
            << ", target nucleus (" << aNucleus.GetZ_asInt() << ","
            << aNucleus.GetA_asInt() << ")" << G4endl;
      Myout_notempty=true;
  }
  if (  std::abs(epReportLevel) == 4
         || std::abs(epReportLevel) == 2
         || ! conservationPass ){

      Myout << "   "<< relResult  <<" relative, limit " << checkLevels.first << ", values E/T(0) = "
             << relative << " p/p(0)= " << relative_mom  << G4endl;
      Myout << "   "<< absResult << " absolute, limit (MeV) " << checkLevels.second/MeV << ", values E / p (MeV) = "
             << absolute/MeV << " / " << absolute_mom/MeV << " 3mom: " << (diff.vect())*1./MeV <<  G4endl;
      Myout << "   "<< chargeResult << " charge/baryon number balance " << (initial_Z-final_Z) << " / " << (initial_A-final_A) << " "<<  G4endl;
      Myout_notempty=true;

  }
  Myout.flush();
  if ( Myout_notempty ) {
     if (epReportLevel > 0)      G4cout << Myout.str()<< G4endl;
     else if (epReportLevel < 0) G4cerr << Myout.str()<< G4endl;
  }
}


void G4HadronicProcess::DumpState(const G4Track& aTrack,
                                  const G4String& method,
                                  G4ExceptionDescription& ed)
{
  ed << "Unrecoverable error in the method " << method << " of "
     << GetProcessName() << G4endl;
  ed << "TrackID= "<< aTrack.GetTrackID() << "  ParentID= "
     << aTrack.GetParentID()
     << "  " << aTrack.GetParticleDefinition()->GetParticleName()
     << G4endl;
  ed << "Ekin(GeV)= " << aTrack.GetKineticEnergy()/CLHEP::GeV
     << ";  direction= " << aTrack.GetMomentumDirection() << G4endl;
  ed << "Position(mm)= " << aTrack.GetPosition()/CLHEP::mm << ";";

  if (aTrack.GetMaterial()) {
    ed << "  material " << aTrack.GetMaterial()->GetName();
  }
  ed << G4endl;

  if (aTrack.GetVolume()) {
    ed << "PhysicalVolume  <" << aTrack.GetVolume()->GetName()
       << ">" << G4endl;
  }
}