Gabriele Cosmo
120 lines
4.1 KiB
Plaintext
120 lines
4.1 KiB
Plaintext
// This code implementation is the intellectual property of
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// the RD44 GEANT4 collaboration.
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//
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// By copying, distributing or modifying the Program (or any work
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// based on the Program) you indicate your acceptance of this statement,
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// and all its terms.
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//
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// $Id: G4eplusAnnihilation.icc,v 1.1 1999/01/07 16:11:18 gunter Exp $
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// GEANT4 tag $Name: geant4-00-01 $
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//
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//
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// ---------------------------------------------------------------
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// GEANT 4 class inlined methods file
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//
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// For information related to this code contact:
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// CERN, CN Division, ASD group
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// History: first implementation, based on object model of
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// 2nd December 1995, G.Cosmo
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// ------------ G4eplusAnnihilation process ---------
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// by Michel Maire, 7 July 1996
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// ***************************************************************
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// 10-01-97, crossection table + meanfreepath table, M.Maire
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// 17-03-97, merge 'in fly' and 'at rest', M.Maire
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// ---------------------------------------------------------------
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4bool G4eplusAnnihilation::IsApplicable(const G4ParticleDefinition& particle)
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{
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return ( &particle == G4Positron::Positron() );
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4eplusAnnihilation::GetCrossSectionPerAtom(
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G4DynamicParticle* aDynamicPositron,
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G4Element* anElement)
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// gives the microscopic total cross section in GEANT4 internal units
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{
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G4double crossSection;
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G4double PositronEnergy = aDynamicPositron->GetKineticEnergy();
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G4bool isOutRange ;
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if (PositronEnergy > HighestEnergyLimit)
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crossSection = 0. ;
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else {
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if (PositronEnergy < LowestEnergyLimit) PositronEnergy = 1.01*LowestEnergyLimit;
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crossSection = (*theCrossSectionTable)(anElement->GetIndex())->
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GetValue( PositronEnergy, isOutRange );
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}
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return crossSection;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4eplusAnnihilation::GetMeanFreePath(const G4Track& aTrack,
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G4double,
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G4ForceCondition*)
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// returns the positron mean free path in GEANT4 internal units
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{
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const G4DynamicParticle* aDynamicPositron = aTrack.GetDynamicParticle();
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G4double PositronEnergy = aDynamicPositron->GetKineticEnergy();
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G4Material* aMaterial = aTrack.GetMaterial();
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G4double MeanFreePath;
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G4bool isOutRange ;
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if (PositronEnergy > HighestEnergyLimit)
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MeanFreePath = DBL_MAX;
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else {
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if (PositronEnergy < LowestEnergyLimit) PositronEnergy = 1.01*LowestEnergyLimit;
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MeanFreePath = (*theMeanFreePathTable)(aMaterial->GetIndex())->
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GetValue( PositronEnergy, isOutRange );
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}
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return MeanFreePath;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4eplusAnnihilation::ComputeMeanFreePath(G4double PositKinEnergy,
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G4Material* aMaterial)
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// returns the positron mean free path in GEANT4 internal units
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{
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const G4ElementVector* theElementVector = aMaterial->GetElementVector() ;
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const G4double* NbOfAtomsPerVolume = aMaterial->GetVecNbOfAtomsPerVolume();
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G4double SIGMA = 0 ;
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for ( G4int elm=0 ; elm < aMaterial->GetNumberOfElements() ; elm++ )
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{
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SIGMA += NbOfAtomsPerVolume[elm] *
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ComputeCrossSectionPerAtom(PositKinEnergy,
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(*theElementVector)(elm)->GetZ());
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}
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return SIGMA > DBL_MIN ? 1./SIGMA : DBL_MAX;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4eplusAnnihilation::GetMeanLifeTime(const G4Track&,
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G4ForceCondition*)
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// returns the annihilation mean life time in GEANT4 internal units
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{
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return 0.0;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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