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Geant4/physics_lists/constructors/hadron_elastic/src/G4HadronElasticPhysicsVI.cc

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 25 //
 26 //---------------------------------------------------------------------------
 27 //
 28 // ClassName:   G4HadronElasticPhysicsVI
 29 //
 30 // Author: 17.10.2023 V.Ivanchenko
 31 //
 32 //----------------------------------------------------------------------------
 33 //
 34 // neutron HP model for E < 20 MeV
 35 
 36 #include "G4HadronElasticPhysicsVI.hh"
 37 #include "G4Neutron.hh"
 38 #include "G4HadronicProcess.hh"
 39 #include "G4ProcessManager.hh"
 40 #include "G4HadronElastic.hh"
 41 #include "G4NeutronHPElasticVI.hh"
 42 #include "G4ParticleHPElastic.hh"
 43 #include "G4NeutronHPElasticXS.hh"
 44 #include "G4SystemOfUnits.hh"
 45 #include "G4HadronicParameters.hh"
 46 #include "G4PhysListUtil.hh"
 47 
 48 // factory
 49 #include "G4PhysicsConstructorFactory.hh"
 50 //
 51 G4_DECLARE_PHYSCONSTR_FACTORY(G4HadronElasticPhysicsVI);
 52 //
 53 
 54 G4HadronElasticPhysicsVI::G4HadronElasticPhysicsVI(G4int ver)
 55   : G4HadronElasticPhysics(ver, "nElasticPhysics_HP")
 56 {
 57   if(ver > 1) { 
 58     G4cout << "### G4HadronElasticPhysicsVI: " << GetPhysicsName() 
 59      << G4endl; 
 60   }
 61   auto param = G4HadronicParameters::Instance();
 62   // HP is inconsistent with the neutron general process
 63   param->SetEnableNeutronGeneralProcess(false);
 64 }
 65 
 66 void G4HadronElasticPhysicsVI::ConstructProcess()
 67 {
 68   G4HadronElasticPhysics::ConstructProcess();
 69 
 70   const G4ParticleDefinition* neutron = G4Neutron::Neutron();
 71   G4HadronicProcess* hel = G4PhysListUtil::FindElasticProcess( neutron );
 72   if ( nullptr == hel ) {
 73     hel = new G4HadronicProcess();
 74     neutron->GetProcessManager()->AddDiscreteProcess(hel);
 75   } else {
 76     G4HadronElastic* he = GetElasticModel(neutron);
 77     he->SetMinEnergy(19.5*CLHEP::MeV); 
 78   }
 79   // apply alternative cross section
 80   hel->AddDataSet( new G4NeutronHPElasticXS() );
 81 
 82   // add HP elastic
 83   auto he = new G4NeutronHPElasticVI();
 84   he->SetMaxEnergy(20*CLHEP::MeV); 
 85   hel->RegisterMe( he );
 86 
 87   if ( G4HadronicParameters::Instance()->GetVerboseLevel() > 1 ) {
 88     G4cout << "### HadronElasticPhysicsVI is constructed " 
 89      << G4endl;
 90   }
 91 }
 92 
 93 
 94