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";
}