G4alphaIonisation Class Reference

#include <G4alphaIonisation.hh>

Inheritance diagram for G4alphaIonisation:

Public Member Functions
	G4alphaIonisation (const G4String &name="alphaIoni")
virtual	~G4alphaIonisation ()
virtual G4bool	IsApplicable (const G4ParticleDefinition &p)
virtual void	PrintInfo ()
Protected Member Functions
virtual void	InitialiseEnergyLossProcess (const G4ParticleDefinition *, const G4ParticleDefinition *)
virtual G4double	MinPrimaryEnergy (const G4ParticleDefinition *p, const G4Material *, G4double cut)
G4double	BetheBlochEnergyThreshold ()

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Detailed Description

Definition at line 59 of file G4alphaIonisation.hh.

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Constructor & Destructor Documentation

G4alphaIonisation::G4alphaIonisation

(

const G4String &

name = "alphaIoni"

)

Definition at line 65 of file G4alphaIonisation.cc.

References fIonisation, G4Exception(), JustWarning, G4VEnergyLossProcess::SetLinearLossLimit(), G4VProcess::SetProcessSubType(), and G4VEnergyLossProcess::SetStepFunction().

  : G4VEnergyLossProcess(name),
    theParticle(0),
    isInitialised(false)
{
  G4Exception("G4alphaIonisation::G4alphaIonisation","em0007",JustWarning,
              " The process is not ready for use - incorrect results are expected");
  SetLinearLossLimit(0.02);
  SetStepFunction(0.2, 0.01*mm);
  //  SetIntegral(true);
  SetProcessSubType(fIonisation);
  //  SetVerboseLevel(1);
  mass = 0.0;
  ratio = 0.0;
  eth = 8*MeV;
}

G4alphaIonisation::~G4alphaIonisation

(

)

[virtual]

Definition at line 84 of file G4alphaIonisation.cc.

{}

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Member Function Documentation

G4double G4alphaIonisation::BetheBlochEnergyThreshold

(

)

[inline, protected]

Definition at line 100 of file G4alphaIonisation.hh.

{
  return eth;
}

void G4alphaIonisation::InitialiseEnergyLossProcess	(	const G4ParticleDefinition *	,
		const G4ParticleDefinition *
	)			[protected, virtual]

Implements G4VEnergyLossProcess.

Definition at line 108 of file G4alphaIonisation.cc.

References G4VEnergyLossProcess::AddEmModel(), G4Alpha::Alpha(), G4Electron::Electron(), G4VEnergyLossProcess::EmModel(), G4VEnergyLossProcess::FluctModel(), G4ParticleDefinition::GetParticleName(), G4ParticleDefinition::GetPDGMass(), G4VEmModel::HighEnergyLimit(), G4VEnergyLossProcess::MaxKinEnergy(), G4VEnergyLossProcess::MinKinEnergy(), G4VEnergyLossProcess::SetBaseParticle(), G4VEnergyLossProcess::SetEmModel(), G4VEnergyLossProcess::SetFluctModel(), G4VEmModel::SetHighEnergyLimit(), G4VEmModel::SetLowEnergyLimit(), and G4VEnergyLossProcess::SetSecondaryParticle().

{
  if(!isInitialised) {

    theParticle = part;
    G4String pname = part->GetParticleName();

    // define base particle
    const G4ParticleDefinition* theBaseParticle = 0;
    if(bpart == 0) { 
      if(pname != "alpha") { theBaseParticle = G4Alpha::Alpha(); }
    } else { theBaseParticle = bpart; }

    mass  = part->GetPDGMass();
    ratio = electron_mass_c2/mass;

    SetBaseParticle(theBaseParticle);
    SetSecondaryParticle(G4Electron::Electron());

    if (!EmModel(1)) { SetEmModel(new G4BraggIonModel(), 1); }
    EmModel(1)->SetLowEnergyLimit(MinKinEnergy());

    // model limit defined for alpha
    eth = (EmModel(1)->HighEnergyLimit())*mass/proton_mass_c2;
    EmModel(1)->SetHighEnergyLimit(eth);

    if (!FluctModel()) { SetFluctModel(new G4UniversalFluctuation()); }
    AddEmModel(1, EmModel(1), new G4IonFluctuations());

    if (!EmModel(2)) { SetEmModel(new G4BetheBlochModel(),2); }  
    EmModel(2)->SetLowEnergyLimit(eth);
    EmModel(2)->SetHighEnergyLimit(MaxKinEnergy());
    AddEmModel(2, EmModel(2), FluctModel());    

    isInitialised = true;
  }
}

G4bool G4alphaIonisation::IsApplicable

(

const G4ParticleDefinition &

p

)

[virtual]

Implements G4VEnergyLossProcess.

Definition at line 89 of file G4alphaIonisation.cc.

References G4ParticleDefinition::GetPDGCharge(), and G4ParticleDefinition::IsShortLived().

{
  return (!p.IsShortLived() &&
          std::fabs(p.GetPDGCharge()/CLHEP::eplus - 2) < 0.01);
}

G4double G4alphaIonisation::MinPrimaryEnergy	(	const G4ParticleDefinition *	p,
		const G4Material *	,
		G4double	cut
	)			[protected, virtual]

Reimplemented from G4VEnergyLossProcess.

Definition at line 97 of file G4alphaIonisation.cc.

References G4InuclParticleNames::gam.

{
  G4double x = 0.5*cut/electron_mass_c2;
  G4double gam = x*ratio + std::sqrt((1. + x)*(1. + x*ratio*ratio));
  return mass*(gam - 1.0);
}

void G4alphaIonisation::PrintInfo

(

)

[virtual]

Implements G4VEnergyLossProcess.

Definition at line 150 of file G4alphaIonisation.cc.

{}

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

• G4alphaIonisation.hh
• G4alphaIonisation.cc

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