Gabriele Cosmo
136 lines
4.7 KiB
Plaintext
136 lines
4.7 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: G4eBremsstrahlungPlus.icc,v 1.1.10.1 1999/12/07 20:50:52 gunter Exp $
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// GEANT4 tag $Name: geant4-01-00 $
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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, IT 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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// ------------ G4eBremsstrahlungPlus physics process ---------
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// by Michel Maire, 27 July 1996
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// ***************************************************************
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// 13-12-96 : Sign corrected in the ScreenFunctions, L.Urban
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// 20/03/97 : new energy loss+ionisation+brems scheme, L.Urban
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// ***************************************************************
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4bool G4eBremsstrahlungPlus::IsApplicable(
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const G4ParticleDefinition& particle)
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{
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return( (&particle == G4Electron::Electron())
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||(&particle == G4Positron::Positron()) );
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4eBremsstrahlungPlus::GetMeanFreePath(const G4Track& track,
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G4double,
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G4ForceCondition*)
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// gives the MeanFreePath in GEANT4 internal units
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{
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const G4DynamicParticle* aDynamicParticle = track.GetDynamicParticle();
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G4double KineticEnergy = aDynamicParticle->GetKineticEnergy();
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G4Material* aMaterial = track.GetMaterial();
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G4double MeanFreePath;
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G4bool isOutRange ;
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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) 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 G4eBremsstrahlungPlus::ScreenFunction1(G4double ScreenVariable)
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// compute the value of the screening function 3*PHI1 - PHI2
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{
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G4double screenVal;
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if (ScreenVariable > 1.)
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screenVal = 42.24 - 8.368*log(ScreenVariable+0.952);
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else
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screenVal = 42.392 - ScreenVariable* (7.796 - 1.961*ScreenVariable);
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return screenVal;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4eBremsstrahlungPlus::ScreenFunction2(G4double ScreenVariable)
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// compute the value of the screening function 1.5*PHI1 - 0.5*PHI2
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{
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G4double screenVal;
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if (ScreenVariable > 1.)
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screenVal = 42.24 - 8.368*log(ScreenVariable+0.952);
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else
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screenVal = 41.734 - ScreenVariable* (6.484 - 1.250*ScreenVariable);
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return screenVal;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4eBremsstrahlungPlus::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 = aMaterial->GetAtomicNumDensityVector();
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G4double GammaEnergyCut = (G4Gamma::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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GammaEnergyCut );
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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 G4eBremsstrahlungPlus::GetLambda(
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G4double KineticEnergy,
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G4Material* material)
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{
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G4bool isOut;
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const G4MaterialTable* theMaterialTable =
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G4Material::GetMaterialTable() ;
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G4double lambda = (*theMeanFreePathTable)
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[material->GetIndex()]->
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GetValue(KineticEnergy,isOut);
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return lambda;
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}
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