Gabriele Cosmo
101 lines
4.3 KiB
Plaintext
101 lines
4.3 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 1.4.2.2 2001/06/28 20:19:44 gunter Exp $
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// GEANT4 tag $Name: $
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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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// 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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//
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// Modified:
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//
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// 29.05.01 V.Ivanchenko minor changes to provide ANSI -wall compilation
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//
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// ---------------------------------------------------------------
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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 ( 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<=0.0 ? 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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