NeutronPhysics Class Reference

Neutron hadronic physics constructor for Belle II physics list. More...

#include <NeutronPhysics.h>

Inheritance diagram for NeutronPhysics:

Public Member Functions
virtual void	ConstructParticle () override
	Build processes, models, cross sections used in physics list.
virtual void	ConstructProcess () override
	Build all particle types used in physics list (empty in this class)

Private Attributes
G4TheoFSGenerator *	m_ftfp
	Final state generator for QCD string models.
G4FTFModel *	m_stringModel
	Fritiof string model.
G4ExcitedStringDecay *	m_stringDecay
	Model to decay strings into hadrons.
G4LundStringFragmentation *	m_fragModel
	Lund string fragmentation model.
G4GeneratorPrecompoundInterface *	m_preCompoundModel
	Precompound model to deexcite post-collision nucleus.

Detailed Description

Neutron hadronic physics constructor for Belle II physics list.

Definition at line 31 of file NeutronPhysics.h.

Constructor & Destructor Documentation

NeutronPhysics()

NeutronPhysics

(

)

Definition at line 36 of file NeutronPhysics.cc.

  : m_ftfp(nullptr), m_stringModel(nullptr), m_stringDecay(nullptr),
    m_fragModel(nullptr), m_preCompoundModel(nullptr)
{}

~NeutronPhysics()

~NeutronPhysics

(

)

Definition at line 42 of file NeutronPhysics.cc.

{
  delete m_stringDecay;
  delete m_stringModel;
  delete m_fragModel;
  delete m_preCompoundModel;
}

Member Function Documentation

ConstructParticle()

void ConstructParticle ( )

overridevirtual

Build processes, models, cross sections used in physics list.

Definition at line 51 of file NeutronPhysics.cc.

{}

ConstructProcess()

void ConstructProcess ( )

overridevirtual

Build all particle types used in physics list (empty in this class)

Definition at line 55 of file NeutronPhysics.cc.

{
  // Low energy elastic model
  G4ChipsElasticModel* elMod = new G4ChipsElasticModel();
 
  // Use Bertini cascade for low energies
  G4CascadeInterface* loInelModel = new G4CascadeInterface;
  loInelModel->SetMinEnergy(0.0);
  loInelModel->SetMaxEnergy(12.0 * GeV);
 
  // Capture model
  G4NeutronRadCapture* capModel = new G4NeutronRadCapture();
 
  // Use FTFP for high energies   ==>>   eventually replace this with new class FTFPInterface
  m_ftfp = new G4TheoFSGenerator("FTFP");
  m_stringModel = new G4FTFModel;
  m_stringDecay =
    new G4ExcitedStringDecay(m_fragModel = new G4LundStringFragmentation);
  m_stringModel->SetFragmentationModel(m_stringDecay);
  m_preCompoundModel = new G4GeneratorPrecompoundInterface();
 
  m_ftfp->SetHighEnergyGenerator(m_stringModel);
  m_ftfp->SetTransport(m_preCompoundModel);
  m_ftfp->SetMinEnergy(5 * GeV);
  m_ftfp->SetMaxEnergy(100 * TeV);
 
  // Cross section sets
  G4BGGNucleonInelasticXS* inelCS = new G4BGGNucleonInelasticXS(G4Neutron::Neutron());
  G4NeutronElasticXS* elCS = new G4NeutronElasticXS;
  G4NeutronCaptureXS* capCS = new G4NeutronCaptureXS;
 
  G4ProcessManager* procMan = G4Neutron::Neutron()->GetProcessManager();
 
  // Elastic process
  G4HadronElasticProcess* nProcEl = new G4HadronElasticProcess;
  nProcEl->RegisterMe(elMod);
  nProcEl->AddDataSet(elCS);
  procMan->AddDiscreteProcess(nProcEl);
 
  // Inelastic process
  G4HadronInelasticProcess* nProcInel = new G4HadronInelasticProcess("neutronInelastic", G4Neutron::Definition());
  nProcInel->RegisterMe(loInelModel);
  nProcInel->RegisterMe(m_ftfp);
  nProcInel->AddDataSet(inelCS);
  procMan->AddDiscreteProcess(nProcInel);
 
  // Capture process
  G4NeutronCaptureProcess* nProcCap = new G4NeutronCaptureProcess;
  nProcCap->RegisterMe(capModel);
  nProcCap->AddDataSet(capCS);
  procMan->AddDiscreteProcess(nProcCap);
 
  // Neutron cut (kill neutrons that live too long or have too little energy)
  G4NeutronKiller* nKiller = new G4NeutronKiller();
  nKiller->SetKinEnergyLimit(0.0 * MeV);
  nKiller->SetTimeLimit(10.*microsecond);
  procMan->AddDiscreteProcess(nKiller);
 
}

Member Data Documentation

m_fragModel

G4LundStringFragmentation* m_fragModel

private

Lund string fragmentation model.

Definition at line 53 of file NeutronPhysics.h.

m_ftfp

G4TheoFSGenerator* m_ftfp

private

Final state generator for QCD string models.

Definition at line 44 of file NeutronPhysics.h.

m_preCompoundModel

G4GeneratorPrecompoundInterface* m_preCompoundModel

private

Precompound model to deexcite post-collision nucleus.

Definition at line 56 of file NeutronPhysics.h.

m_stringDecay

G4ExcitedStringDecay* m_stringDecay

private

Model to decay strings into hadrons.

Definition at line 50 of file NeutronPhysics.h.

m_stringModel

G4FTFModel* m_stringModel

private

Fritiof string model.

Definition at line 47 of file NeutronPhysics.h.

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The documentation for this class was generated from the following files:

• simulation/physicslist/include/NeutronPhysics.h
• simulation/physicslist/src/NeutronPhysics.cc