G4UCNAbsorption Class Reference

#include <G4UCNAbsorption.hh>

Inheritance diagram for G4UCNAbsorption:

Public Member Functions
	G4UCNAbsorption (const G4String &processName="UCNAbsorption", G4ProcessType type=fUCN)
virtual	~G4UCNAbsorption ()
G4bool	IsApplicable (const G4ParticleDefinition &aParticleType)
G4double	GetMeanFreePath (const G4Track &aTrack, G4double, G4ForceCondition *condition)
G4VParticleChange *	PostStepDoIt (const G4Track &aTrack, const G4Step &aStep)
Public Member Functions inherited from G4VDiscreteProcess
	G4VDiscreteProcess (const G4String &aName, G4ProcessType aType=fNotDefined)
	G4VDiscreteProcess (G4VDiscreteProcess &)
virtual	~G4VDiscreteProcess ()
G4VDiscreteProcess &	operator= (const G4VDiscreteProcess &)=delete
virtual G4double	PostStepGetPhysicalInteractionLength (const G4Track &track, G4double previousStepSize, G4ForceCondition *condition)
virtual G4double	AlongStepGetPhysicalInteractionLength (const G4Track &, G4double, G4double, G4double &, G4GPILSelection *)
virtual G4double	AtRestGetPhysicalInteractionLength (const G4Track &, G4ForceCondition *)
virtual G4VParticleChange *	AtRestDoIt (const G4Track &, const G4Step &)
virtual G4VParticleChange *	AlongStepDoIt (const G4Track &, const G4Step &)
virtual G4double	GetCrossSection (const G4double, const G4MaterialCutsCouple *)
virtual G4double	MinPrimaryEnergy (const G4ParticleDefinition *, const G4Material *)
Public Member Functions inherited from G4VProcess
	G4VProcess (const G4String &aName="NoName", G4ProcessType aType=fNotDefined)
	G4VProcess (const G4VProcess &right)
virtual	~G4VProcess ()
G4VProcess &	operator= (const G4VProcess &)=delete
G4bool	operator== (const G4VProcess &right) const
G4bool	operator!= (const G4VProcess &right) const
G4double	GetCurrentInteractionLength () const
void	SetPILfactor (G4double value)
G4double	GetPILfactor () const
G4double	AlongStepGPIL (const G4Track &track, G4double previousStepSize, G4double currentMinimumStep, G4double &proposedSafety, G4GPILSelection *selection)
G4double	AtRestGPIL (const G4Track &track, G4ForceCondition *condition)
G4double	PostStepGPIL (const G4Track &track, G4double previousStepSize, G4ForceCondition *condition)
virtual void	BuildPhysicsTable (const G4ParticleDefinition &)
virtual void	PreparePhysicsTable (const G4ParticleDefinition &)
virtual G4bool	StorePhysicsTable (const G4ParticleDefinition *, const G4String &, G4bool)
virtual G4bool	RetrievePhysicsTable (const G4ParticleDefinition *, const G4String &, G4bool)
const G4String &	GetPhysicsTableFileName (const G4ParticleDefinition *, const G4String &directory, const G4String &tableName, G4bool ascii=false)
const G4String &	GetProcessName () const
G4ProcessType	GetProcessType () const
void	SetProcessType (G4ProcessType)
G4int	GetProcessSubType () const
void	SetProcessSubType (G4int)
virtual const G4VProcess *	GetCreatorProcess () const
virtual void	StartTracking (G4Track *)
virtual void	EndTracking ()
virtual void	SetProcessManager (const G4ProcessManager *)
virtual const G4ProcessManager *	GetProcessManager ()
virtual void	ResetNumberOfInteractionLengthLeft ()
G4double	GetNumberOfInteractionLengthLeft () const
G4double	GetTotalNumberOfInteractionLengthTraversed () const
G4bool	isAtRestDoItIsEnabled () const
G4bool	isAlongStepDoItIsEnabled () const
G4bool	isPostStepDoItIsEnabled () const
virtual void	DumpInfo () const
virtual void	ProcessDescription (std::ostream &outfile) const
void	SetVerboseLevel (G4int value)
G4int	GetVerboseLevel () const
virtual void	SetMasterProcess (G4VProcess *masterP)
const G4VProcess *	GetMasterProcess () const
virtual void	BuildWorkerPhysicsTable (const G4ParticleDefinition &part)
virtual void	PrepareWorkerPhysicsTable (const G4ParticleDefinition &)

Additional Inherited Members
Static Public Member Functions inherited from G4VProcess
static const G4String &	GetProcessTypeName (G4ProcessType)
Protected Member Functions inherited from G4VDiscreteProcess
Protected Member Functions inherited from G4VProcess
void	SubtractNumberOfInteractionLengthLeft (G4double prevStepSize)
void	ClearNumberOfInteractionLengthLeft ()
Protected Attributes inherited from G4VProcess
const G4ProcessManager *	aProcessManager = nullptr
G4VParticleChange *	pParticleChange = nullptr
G4ParticleChange	aParticleChange
G4double	theNumberOfInteractionLengthLeft = -1.0
G4double	currentInteractionLength = -1.0
G4double	theInitialNumberOfInteractionLength = -1.0
G4String	theProcessName
G4String	thePhysicsTableFileName
G4ProcessType	theProcessType = fNotDefined
G4int	theProcessSubType = -1
G4double	thePILfactor = 1.0
G4int	verboseLevel = 0
G4bool	enableAtRestDoIt = true
G4bool	enableAlongStepDoIt = true
G4bool	enablePostStepDoIt = true

Detailed Description

Definition at line 65 of file G4UCNAbsorption.hh.

Constructor & Destructor Documentation

G4UCNAbsorption()

G4UCNAbsorption::G4UCNAbsorption	(	const G4String &	processName = "UCNAbsorption",
		G4ProcessType	type = fUCN )

Definition at line 73 of file G4UCNAbsorption.cc.

               : G4VDiscreteProcess(processName, type)
{
  if (verboseLevel>0) G4cout << GetProcessName() << " is created " << G4endl;
 
  SetProcessSubType(fUCNAbsorption);
}

~G4UCNAbsorption()

G4UCNAbsorption::~G4UCNAbsorption ( )

virtual

Definition at line 89 of file G4UCNAbsorption.cc.

{}

Member Function Documentation

GetMeanFreePath()

G4double G4UCNAbsorption::GetMeanFreePath ( const G4Track & aTrack, G4double , G4ForceCondition * condition )

virtual

Implements G4VDiscreteProcess.

Definition at line 119 of file G4UCNAbsorption.cc.

{
  G4double AttenuationLength = DBL_MAX;
 
  const G4Material* aMaterial = aTrack.GetMaterial();
  G4MaterialPropertiesTable* aMaterialPropertiesTable =
                                     aMaterial->GetMaterialPropertiesTable();
 
  G4double losscs = 0.0;
  if (aMaterialPropertiesTable) {
     losscs = aMaterialPropertiesTable->GetConstProperty("ABSCS");
//     if (losscs == 0.0)
//       G4cout << "No UCN Absorption length specified" << G4endl;
  }
//  else G4cout << "No UCN Absorption length specified" << G4endl;
 
  if (losscs) {
 
    // Calculate a UCN absorption length for this cross section
 
    // *** Thermal boost ***
 
    // Prepare neutron
 
    //G4double theA = aMaterial->GetElement(0)->GetN();
    //G4double theZ = aMaterial->GetElement(0)->GetZ();
 
    //G4ReactionProduct 
    //  theNeutron(const_cast<G4ParticleDefinition *>(aTrack.GetDefinition()));
    //theNeutron.SetMomentum(aTrack.GetMomentum());
    //theNeutron.SetKineticEnergy(aTrack.GetKineticEnergy());
    //G4ThreeVector neuVelo = theNeutron.GetMomentum()/
    //                        aTrack.GetDefinition()->GetPDGMass());
 
    // Prepare properly biased thermal nucleus
 
    //G4double theA = aMaterial->GetElement(0)->GetN();
    //G4double theZ = aMaterial->GetElement(0)->GetZ();
 
    //G4double eps = 0.0001;
 
    //G4double eleMass =
    //             G4NucleiPropertiesTable::
    //               GetNuclearMass(static_cast<G4int>(theZ+eps),
    //                              static_cast<G4int>(theA+eps))) 
    //                              / G4Neutron::Neutron()->GetPDGMass();
 
    //G4Nucleus aNuc;
 
    //G4ReactionProduct aThermalNuc =
    //  aNuc.GetBiasedThermalNucleus(eleMass,
    //                               neuVelo,
    //                               aMaterial->GetTemperature());
 
    // Boost to rest system and return
 
    //G4ReactionProduct boosted;
    //boosted.Lorentz(theNeutron, aThermalNuc);
 
    //G4double vel = sqrt(2*boosted.GetKineticEnergy()/
    //                       neutron_mass_c2*c_squared);
 
    G4double density = aMaterial->GetTotNbOfAtomsPerVolume();
 
    // Calculate cross section for a constant loss 
 
    G4double vel = aTrack.GetVelocity();
    
    //G4cout << aTrack.GetVelocity()/meter*second << " "
    //       << vel/meter*second << "meters/second" << G4endl;
   
    // Input data is normally taken from the website:
    // http://rrdjazz.nist.gov/resources/n-lengths/list.html
    // and coresponds to 2200 m/s fast neutrons
 
    G4double crossect = losscs*barn*2200.*meter/second/vel;   
    
    // In principle, if one asks for the MaterialProperty incoherent cross
    // section, one could put the formula for inelastic up scattering here
    // and add the cross section to the absorption
    
    //    sigma inelastic = ... ignatovic, p. 174.
    
    // attenuation length in mm
    AttenuationLength = 1./density/crossect;
 
    if (verboseLevel>0) G4cout << "UCNABSORPTION with" 
        << " AttenuationLength: " << AttenuationLength/m << "m"
        << " CrossSection: " << crossect/barn << "barn" << G4endl;
  }
 
  return AttenuationLength;
}

IsApplicable()

G4bool G4UCNAbsorption::IsApplicable ( const G4ParticleDefinition & aParticleType )

inlinevirtual

Reimplemented from G4VProcess.

Definition at line 113 of file G4UCNAbsorption.hh.

{
   return ( &aParticleType == G4Neutron::NeutronDefinition() );
}

PostStepDoIt()

G4VParticleChange * G4UCNAbsorption::PostStepDoIt ( const G4Track & aTrack, const G4Step & aStep )

virtual

Reimplemented from G4VDiscreteProcess.

Definition at line 99 of file G4UCNAbsorption.cc.

{
  aParticleChange.Initialize(aTrack);
 
  aParticleChange.ProposeTrackStatus(fStopAndKill);
 
  if ( verboseLevel > 0 ) G4cout << "UCNABSORPTION at: " 
     << aTrack.GetProperTime()/s << "s, "
     << aTrack.GetGlobalTime()/s << "s. "
     << ", after track length " << aTrack.GetTrackLength()/cm << "cm, "
           << "in volume "
           << aStep.GetPostStepPoint()->GetPhysicalVolume()->GetName()
           << G4endl;
  
  return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}

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

• G4UCNAbsorption.hh
• G4UCNAbsorption.cc