Gabriele Cosmo
132 lines
5.2 KiB
Plaintext
132 lines
5.2 KiB
Plaintext
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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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 *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4eplusAnnihilation.icc,v 1.8 2001/09/17 17:07:11 maire Exp $
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// GEANT4 tag $Name: geant4-05-02-patch-01 $
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//
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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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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// 28-05-01, V.Ivanchenko minor changes to provide ANSI -wall compilation
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// 17-09-01, migration of Materials to pure STL (mma)
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//
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline G4bool G4eplusAnnihilation::IsApplicable(
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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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// return the total cross section per atom 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) MeanFreePath = DBL_MAX;
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else
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{
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if (PositronEnergy < LowestEnergyLimit)
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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(
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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 (size_t 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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