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Cross-Referencing   Geant4
Geant4/processes/hadronic/models/particle_hp/src/G4NeutronHPCapture.cc

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  //
  // neutron_hp -- source file
  // J.P. Wellisch, Nov-1996
  // A prototype of the low energy neutron transport model.
  //
  // 070523 bug fix for G4FPE_DEBUG on by A. Howard ( and T. Koi)
  //
  // P. Arce, June-2014 Conversion neutron_hp to particle_hp
  // V. Ivanchenko July-2023 converted back
  //
  #include "G4NeutronHPCapture.hh"
  
  #include "G4IonTable.hh"
  #include "G4NeutronHPCaptureFS.hh"
  #include "G4ParticleHPDeExGammas.hh"
  #include "G4ParticleHPManager.hh"
  #include "G4ParticleTable.hh"
  #include "G4ParticleHPThermalBoost.hh"
  #include "G4SystemOfUnits.hh"
  #include "G4Threading.hh"
  
  G4NeutronHPCapture::G4NeutronHPCapture() : G4HadronicInteraction("NeutronHPCapture")
  {
    SetMinEnergy(0.0);
    SetMaxEnergy(20. * MeV);
  }
  
  G4NeutronHPCapture::~G4NeutronHPCapture()
  {
    if (!G4Threading::IsWorkerThread()) {
      if (theCapture != nullptr) {
        for (auto& ite : *theCapture) {
          delete ite;
        }
        theCapture->clear();
      }
    }
  }
  
  G4HadFinalState*
  G4NeutronHPCapture::ApplyYourself(const G4HadProjectile& aTrack,
                                    G4Nucleus& aNucleus)
  {
    G4ParticleHPManager::GetInstance()->OpenReactionWhiteBoard();
    const G4Material* theMaterial = aTrack.GetMaterial();
    auto n = (G4int)theMaterial->GetNumberOfElements();
    std::size_t index = theMaterial->GetElement(0)->GetIndex();
    if (n != 1) {
      auto xSec = new G4double[n];
      G4double sum = 0;
      G4int i;
      const G4double* NumAtomsPerVolume = theMaterial->GetVecNbOfAtomsPerVolume();
      G4double rWeight;
      G4ParticleHPThermalBoost aThermalE;
      for (i = 0; i < n; ++i) {
        index = theMaterial->GetElement(i)->GetIndex();
        rWeight = NumAtomsPerVolume[i];
        xSec[i] = ((*theCapture)[index])->GetXsec(
          aThermalE.GetThermalEnergy(aTrack, theMaterial->GetElement(i),
                                     theMaterial->GetTemperature()));
        xSec[i] *= rWeight;
        sum += xSec[i];
      }
      G4double random = G4UniformRand();
      G4double running = 0;
      for (i = 0; i < n; ++i) {
        running += xSec[i];
        index = theMaterial->GetElement(i)->GetIndex();
        // if(random<=running/sum) break;
        if (sum == 0 || random <= running / sum) break;
      }
      if (i == n) i = std::max(0, n - 1);
      delete[] xSec;
    }
  
   G4HadFinalState* result = ((*theCapture)[index])->ApplyYourself(aTrack);
 
   // Overwrite target parameters
   aNucleus.SetParameters(G4ParticleHPManager::GetInstance()->GetReactionWhiteBoard()->GetTargA(),
                          G4ParticleHPManager::GetInstance()->GetReactionWhiteBoard()->GetTargZ());
   const G4Element* target_element = (*G4Element::GetElementTable())[index];
   const G4Isotope* target_isotope = nullptr;
   auto iele = (G4int)target_element->GetNumberOfIsotopes();
   for (G4int j = 0; j != iele; ++j) {
     target_isotope = target_element->GetIsotope(j);
     if (target_isotope->GetN()
         == G4ParticleHPManager::GetInstance()->GetReactionWhiteBoard()->GetTargA())
       break;
   }
   // G4cout << "Target Material of this reaction is " << theMaterial->GetName() << G4endl;
   // G4cout << "Target Element of this reaction is " << target_element->GetName() << G4endl;
   // G4cout << "Target Isotope of this reaction is " << target_isotope->GetName() << G4endl;
   aNucleus.SetIsotope(target_isotope);
 
   G4ParticleHPManager::GetInstance()->CloseReactionWhiteBoard();
   return result;
 }
 
 const std::pair<G4double, G4double>
 G4NeutronHPCapture::GetFatalEnergyCheckLevels() const
 {
   // max energy non-conservation is mass of heavy nucleus
   return std::pair<G4double, G4double>(10.0 * perCent, 350.0 * CLHEP::GeV);
 }
 
 G4int G4NeutronHPCapture::GetVerboseLevel() const
 {
   return G4ParticleHPManager::GetInstance()->GetVerboseLevel();
 }
 
 void G4NeutronHPCapture::SetVerboseLevel(G4int newValue)
 {
   G4ParticleHPManager::GetInstance()->SetVerboseLevel(newValue);
 }
 
 void G4NeutronHPCapture::BuildPhysicsTable(const G4ParticleDefinition&)
 {
   G4ParticleHPManager* hpmanager = G4ParticleHPManager::GetInstance();
 
   theCapture = hpmanager->GetCaptureFinalStates();
 
   if (G4Threading::IsMasterThread()) {
     if (theCapture == nullptr)
       theCapture = new std::vector<G4ParticleHPChannel*>;
 
     if (numEle == (G4int)G4Element::GetNumberOfElements()) return;
 
     if (theCapture->size() == G4Element::GetNumberOfElements()) {
       numEle = (G4int)G4Element::GetNumberOfElements();
       return;
     }
 
     if (G4FindDataDir("G4NEUTRONHPDATA") == nullptr)
       throw G4HadronicException(
         __FILE__, __LINE__,
         "Please setenv G4NEUTRONHPDATA to point to the neutron cross-section files.");
     dirName = G4FindDataDir("G4NEUTRONHPDATA");
     G4String tString = "/Capture";
     dirName = dirName + tString;
 
     auto theFS = new G4NeutronHPCaptureFS;
     for (G4int i = numEle; i < (G4int)G4Element::GetNumberOfElements(); ++i) {
       theCapture->push_back(new G4ParticleHPChannel);
       ((*theCapture)[i])->Init((*(G4Element::GetElementTable()))[i], dirName);
       ((*theCapture)[i])->Register(theFS);
     }
     delete theFS;
     hpmanager->RegisterCaptureFinalStates(theCapture);
   }
   numEle = (G4int)G4Element::GetNumberOfElements();
 }
 
 void G4NeutronHPCapture::ModelDescription(std::ostream& outFile) const
 {
   outFile << "High Precision model based on Evaluated Nuclear Data Files (ENDF)"
           << " for radiative capture reaction of neutrons below 20 MeV";
 }