G4ThermalNeutrons.cc

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//
//---------------------------------------------------------------------------
//
// ClassName:   G4ThermalNeutrons
//
// Author: 4 May 2017 V. Ivanchenko
//
// Modified:
//
//----------------------------------------------------------------------------
//
 
#include "G4ThermalNeutrons.hh"
 
#include "G4ParticleDefinition.hh"
#include "G4ProcessManager.hh"
#include "G4HadronicProcess.hh"
 
#include "G4ParticleHPThermalScattering.hh"
#include "G4ParticleHPThermalScatteringData.hh"
#include "G4HadronicParameters.hh"
 
#include "G4BuilderType.hh"
#include "G4PhysListUtil.hh"
#include "G4SystemOfUnits.hh"
 
#include "G4PhysicsConstructorFactory.hh"
G4_DECLARE_PHYSCONSTR_FACTORY(G4ThermalNeutrons);
 
G4ThermalNeutrons::G4ThermalNeutrons(G4int ver) :
  G4VHadronPhysics("ThermalNeutrons", ver) {
  // because it is an addition, the type of this constructor is 0
}
 
G4ThermalNeutrons::~G4ThermalNeutrons() {}
 
void G4ThermalNeutrons::ConstructProcess() {
 
  if(G4HadronicParameters::Instance()->GetVerboseLevel() > 1) {
    G4cout << "### " << GetPhysicsName() << " Construct Processes " << G4endl;
  }
  G4Neutron* part = G4Neutron::Neutron();
  G4HadronicProcess* hpel = G4PhysListUtil::FindElasticProcess(part);
  if(nullptr == hpel) {
    G4cout << "### " << GetPhysicsName() 
       << " WARNING: Fail to add thermal neutron scattering" << G4endl;
    return;
  }
 
  std::size_t ni = (hpel->GetHadronicInteractionList()).size();
  if(ni < 1) {
    G4cout << "### " << GetPhysicsName() 
       << " WARNING: Fail to add thermal neutron scattering - Nint= " 
       << ni << G4endl;
    return;
  }
  (hpel->GetHadronicInteractionList())[ni-1]->SetMinEnergy(4*CLHEP::eV);
 
  hpel->RegisterMe(new G4ParticleHPThermalScattering());
  hpel->AddDataSet(new G4ParticleHPThermalScatteringData());
  
}