G4eplusAnnihilation Class Reference

#include <G4eplusAnnihilation.hh>

Inheritance diagram for G4eplusAnnihilation:

Public Member Functions
	G4eplusAnnihilation (const G4String &name="annihil")
virtual	~G4eplusAnnihilation ()
virtual G4bool	IsApplicable (const G4ParticleDefinition &p)
virtual G4VParticleChange *	AtRestDoIt (const G4Track &track, const G4Step &stepData)
virtual G4double	AtRestGetPhysicalInteractionLength (const G4Track &track, G4ForceCondition *condition)
virtual void	PrintInfo ()
Protected Member Functions
virtual void	InitialiseProcess (const G4ParticleDefinition *)

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Detailed Description

Definition at line 67 of file G4eplusAnnihilation.hh.

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Constructor & Destructor Documentation

G4eplusAnnihilation::G4eplusAnnihilation

(

const G4String &

name = "annihil"

)

Definition at line 68 of file G4eplusAnnihilation.cc.

References G4VProcess::enableAtRestDoIt, fAnnihilation, G4Gamma::Gamma(), G4VEmProcess::SetBuildTableFlag(), G4VEmProcess::SetIntegral(), G4VProcess::SetProcessSubType(), G4VEmProcess::SetSecondaryParticle(), and G4VEmProcess::SetStartFromNullFlag().

  : G4VEmProcess(name), isInitialised(false)
{
  theGamma = G4Gamma::Gamma();
  SetIntegral(true);
  SetBuildTableFlag(false);
  SetStartFromNullFlag(false);
  SetSecondaryParticle(theGamma);
  SetProcessSubType(fAnnihilation);
  enableAtRestDoIt = true;
}

G4eplusAnnihilation::~G4eplusAnnihilation

(

)

[virtual]

Definition at line 82 of file G4eplusAnnihilation.cc.

{}

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Member Function Documentation

G4VParticleChange * G4eplusAnnihilation::AtRestDoIt	(	const G4Track &	track,
		const G4Step &	stepData
	)			[virtual]

Reimplemented from G4VDiscreteProcess.

Definition at line 121 of file G4eplusAnnihilation.cc.

References G4ParticleChangeForGamma::AddSecondary(), G4VEmProcess::fParticleChange, fStopAndKill, G4UniformRand, G4Track::GetWeight(), G4ParticleChangeForGamma::InitializeForPostStep(), G4VParticleChange::ProposeTrackStatus(), G4VParticleChange::ProposeWeight(), G4VParticleChange::SetNumberOfSecondaries(), and G4DynamicParticle::SetPolarization().

        : Effects due to binding of atomic electrons are negliged.
{
  fParticleChange.InitializeForPostStep(aTrack);

  G4double cosTeta = 2.*G4UniformRand()-1.; 
  G4double sinTeta = sqrt((1.-cosTeta)*(1.0 + cosTeta));
  G4double phi     = twopi * G4UniformRand();
  G4ThreeVector dir(sinTeta*cos(phi), sinTeta*sin(phi), cosTeta);
  phi = twopi * G4UniformRand();
  G4ThreeVector pol(cos(phi), sin(phi), 0.0);
  pol.rotateUz(dir);
  
  fParticleChange.ProposeWeight(aTrack.GetWeight());
  // add gammas
  fParticleChange.SetNumberOfSecondaries(2);
  G4DynamicParticle* dp = 
    new G4DynamicParticle(theGamma, dir, electron_mass_c2);
  dp->SetPolarization(pol.x(),pol.y(),pol.z()); 
  fParticleChange.AddSecondary(dp);

  dp = new G4DynamicParticle(theGamma,-dir, electron_mass_c2);
  dp->SetPolarization(-pol.x(),-pol.y(),-pol.z()); 
  fParticleChange.AddSecondary(dp);

  // Kill the incident positron
  //
  fParticleChange.ProposeTrackStatus(fStopAndKill);
  return &fParticleChange;
}

G4double G4eplusAnnihilation::AtRestGetPhysicalInteractionLength	(	const G4Track &	track,
		G4ForceCondition *	condition
	)			[virtual]

Reimplemented from G4VDiscreteProcess.

Definition at line 94 of file G4eplusAnnihilation.cc.

References NotForced.

{
  *condition = NotForced;
  return 0.0;
}

void G4eplusAnnihilation::InitialiseProcess

(

const G4ParticleDefinition *

)

[protected, virtual]

Implements G4VEmProcess.

Definition at line 103 of file G4eplusAnnihilation.cc.

References G4VEmProcess::AddEmModel(), G4VEmProcess::EmModel(), G4VEmProcess::MaxKinEnergy(), G4VEmProcess::MinKinEnergy(), G4VEmProcess::SetEmModel(), G4VEmModel::SetHighEnergyLimit(), and G4VEmModel::SetLowEnergyLimit().

{
  if(!isInitialised) {
    isInitialised = true;
    if(!EmModel(1)) { SetEmModel(new G4eeToTwoGammaModel(),1); }
    EmModel(1)->SetLowEnergyLimit(MinKinEnergy());
    EmModel(1)->SetHighEnergyLimit(MaxKinEnergy());
    AddEmModel(1, EmModel(1));
  }
}

G4bool G4eplusAnnihilation::IsApplicable

(

const G4ParticleDefinition &

p

)

[virtual]

Implements G4VEmProcess.

Definition at line 87 of file G4eplusAnnihilation.cc.

References G4Positron::Positron().

{
  return (&p == G4Positron::Positron());
}

void G4eplusAnnihilation::PrintInfo

(

)

[virtual]

Implements G4VEmProcess.

Definition at line 116 of file G4eplusAnnihilation.cc.

{} 

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

• G4eplusAnnihilation.hh
• G4eplusAnnihilation.cc

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