Gabriele Cosmo
104 lines
4.6 KiB
Plaintext
104 lines
4.6 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: G4MuPairProduction.icc,v 1.8 2001/10/24 16:36:40 maire Exp $
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// GEANT4 tag $Name: geant4-05-00 $
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//
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//--------------- G4MuPairProduction physics process ------------------
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// by Laszlo Urban, May 1998
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//------------------------------------------------------------------------------
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//
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// Modified:
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//
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// 17-09-01 migration of Materials to pure STL (mma)
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// 29.05.01 V.Ivanchenko minor changes to provide ANSI -wall compilation
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// 28-09-01 suppression of theMuonPlus ..etc..data members (mma)
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//
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//------------------------------------------------------------------------------
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline G4double G4MuPairProduction::GetMeanFreePath(const G4Track& trackData,
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G4double previousStepSize,
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G4ForceCondition* condition)
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{
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const G4DynamicParticle* aDynamicParticle;
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G4Material* aMaterial;
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G4double MeanFreePath;
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G4bool isOutRange ;
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*condition = NotForced ;
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aDynamicParticle = trackData.GetDynamicParticle();
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aMaterial = trackData.GetMaterial();
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G4double KineticEnergy = aDynamicParticle->GetKineticEnergy();
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if (KineticEnergy < LowestKineticEnergy)
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MeanFreePath = DBL_MAX ;
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else {
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if (KineticEnergy > HighestKineticEnergy)
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KineticEnergy = 0.99*HighestKineticEnergy ;
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MeanFreePath = (*theMeanFreePathTable)(aMaterial->GetIndex())->
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GetValue( KineticEnergy, 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 G4MuPairProduction::ComputeMeanFreePath(
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const G4ParticleDefinition* ParticleType,
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G4double KineticEnergy,
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const G4Material* aMaterial)
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{
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const G4ElementVector* theElementVector = aMaterial->GetElementVector();
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const G4double* theAtomNumDensityVector =
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aMaterial->GetAtomicNumDensityVector();
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G4double ElectronEnergyCut =
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G4Electron::Electron()->GetEnergyThreshold(aMaterial);
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G4double PositronEnergyCut =
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G4Positron::Positron()->GetEnergyThreshold(aMaterial);
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G4double SIGMA = 0;
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for ( size_t i=0 ; i < aMaterial->GetNumberOfElements() ; i++ )
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{
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SIGMA += theAtomNumDensityVector[i] *
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ComputeMicroscopicCrossSection( ParticleType, KineticEnergy,
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(*theElementVector)[i]->GetZ(),
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ElectronEnergyCut,PositronEnergyCut );
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}
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return SIGMA > 0. ? 1./SIGMA : DBL_MAX;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline G4bool G4MuPairProduction::IsApplicable(
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const G4ParticleDefinition& particle)
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{
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return ((&particle == G4MuonPlus::MuonPlus() ) ||
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(&particle == G4MuonMinus::MuonMinus()) );
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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