Gabriele Cosmo
80 lines
3.1 KiB
Plaintext
80 lines
3.1 KiB
Plaintext
// This code implementation is the intellectual property of
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// the 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: G4MuPairProduction.icc,v 1.3 2000/02/10 08:29:13 urban Exp $
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// GEANT4 tag $Name: geant4-03-00 $
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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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// -------- G4MuPairProduction physics process ---------
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// by Laszlo Urban, May 1998
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// ***************************************************************
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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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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::GetCutsInEnergy())[aMaterial->GetIndex()];
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G4double PositronEnergyCut =
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(G4Positron::GetCutsInEnergy())[aMaterial->GetIndex()];
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G4double SIGMA = 0 ;
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for ( G4int 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<=0.0 ? DBL_MAX : 1./SIGMA ;
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}
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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 == (const G4ParticleDefinition *)theMuonMinus)
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||(&particle == (const G4ParticleDefinition *)theMuonPlus)
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) ;
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}
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