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This commit is contained in:
Gabriele Cosmo
2016-06-08 15:09:25 +02:00
parent b97f8d0df7
commit aaa409b6ee
2922 changed files with 55107 additions and 81674 deletions
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source/processes/electromagnetic/standard/src/G4PhotoElectricEffect.cc
+32 -20
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@@ -5,8 +5,8 @@
// based on the Program) you indicate your acceptance of this statement,
// and all its terms.
//
// $Id: G4PhotoElectricEffect.cc,v 2.10 1998/11/17 10:59:19 maire Exp $
// GEANT4 tag $Name: geant4-00 $
// $Id: G4PhotoElectricEffect.cc,v 1.7 1999/06/08 13:29:23 maire Exp $
// GEANT4 tag $Name: geant4-00-01 $
//
//
// --------------------------------------------------------------
@@ -30,6 +30,9 @@
// 04-06-98, in DoIt, secondary production condition: range>min(threshold,safety)
// 13-08-98, new methods SetBining() PrintInfo()
// 17-11-98, use table of Atomic shells in PostStepDoIt
// 06-01-99, use Sandia crossSection below 50 keV, V.Grichine mma
// 20-05-99, protection against very low energy photons ,L.Urban
// 08-06-99, removed this above protection from the DoIt. mma
// --------------------------------------------------------------
#include "G4PhotoElectricEffect.hh"
@@ -44,7 +47,7 @@ G4PhotoElectricEffect::G4PhotoElectricEffect(const G4String& processName)
: G4VDiscreteProcess (processName), // initialization
theCrossSectionTable(NULL),
theMeanFreePathTable(NULL),
LowestEnergyLimit (10*keV),
LowestEnergyLimit (50*keV),
HighestEnergyLimit(50*MeV),
NumbBinTable(100)
{ }
@@ -143,7 +146,7 @@ void G4PhotoElectricEffect::BuildPhysicsTable(const G4ParticleDefinition& Photon
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4double G4PhotoElectricEffect::ComputeCrossSectionPerAtom (G4double PhotonEnergy,
G4double AtomicNumber)
G4double AtomicNumber)
// Calculates the microscopic cross section in GEANT4 internal units.
// A parametrized formula from L. Urban is used to estimate the total cross section.
@@ -195,6 +198,21 @@ G4double G4PhotoElectricEffect::ComputeCrossSectionPerAtom (G4double PhotonEnerg
return CrossSection;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
G4double G4PhotoElectricEffect::ComputeSandiaCrossSection(G4double PhotonEnergy,
G4double AtomicNumber)
{
G4double energy2 = PhotonEnergy*PhotonEnergy, energy3 = PhotonEnergy*energy2,
energy4 = energy2*energy2;
G4double* SandiaCof
= G4SandiaTable::GetSandiaCofPerAtom((int)AtomicNumber,PhotonEnergy);
return SandiaCof[0]/PhotonEnergy + SandiaCof[1]/energy2 +
SandiaCof[2]/energy3 + SandiaCof[3]/energy4;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
@@ -206,15 +224,13 @@ G4VParticleChange* G4PhotoElectricEffect::PostStepDoIt(const G4Track& aTrack,
// GEANT4 internal units
//
{
aParticleChange.Initialize(aTrack);
{ aParticleChange.Initialize(aTrack);
G4Material* aMaterial = aTrack.GetMaterial();
const G4DynamicParticle* aDynamicPhoton = aTrack.GetDynamicParticle();
G4double PhotonEnergy = aDynamicPhoton->GetKineticEnergy();
G4ParticleMomentum PhotonDirection = aDynamicPhoton->GetMomentumDirection();
// select randomly one element constituing the material.
G4Element* anElement = SelectRandomAtom(aDynamicPhoton, aMaterial);
@@ -250,14 +266,11 @@ G4VParticleChange* G4PhotoElectricEffect::PostStepDoIt(const G4Track& aTrack,
//
// Kill the incident photon
//
aParticleChange.SetMomentumChange( 0., 0., 0. ) ;
aParticleChange.SetEnergyChange( 0. ) ;
aParticleChange.SetLocalEnergyDeposit( PhotonEnergy - ElecKineEnergy ) ;
aParticleChange.SetStatusChange( fStopAndKill ) ;
aParticleChange.SetLocalEnergyDeposit(PhotonEnergy-ElecKineEnergy);
aParticleChange.SetStatusChange(fStopAndKill);
// Reset NbOfInteractionLengthLeft and return aParticleChange
return G4VDiscreteProcess::PostStepDoIt( aTrack, aStep );
return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
@@ -275,26 +288,25 @@ G4PhotoElectricEffect::SelectRandomAtom(const G4DynamicParticle* aDynamicPhoton,
const G4double* NbOfAtomsPerVolume = aMaterial->GetVecNbOfAtomsPerVolume();
G4double PartialSumSigma = 0. ;
G4double rval = G4UniformRand()/MeanFreePath;
G4double rval = G4UniformRand();
for ( G4int elm=0 ; elm < NumberOfElements ; elm++ )
{ PartialSumSigma += NbOfAtomsPerVolume[elm] *
GetCrossSectionPerAtom(aDynamicPhoton,
(*theElementVector)(elm));
if (rval <= PartialSumSigma) return ((*theElementVector)(elm));
if (rval <= PartialSumSigma*MeanFreePath) return ((*theElementVector)(elm));
}
G4cout << " WARNING !!! - The Material '"<< aMaterial->GetName()
<< "' has no elements, NULL pointer returned." << endl;
return NULL;
return ((*theElementVector)(NumberOfElements-1));
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
void G4PhotoElectricEffect::PrintInfoDefinition()
{
G4String comments = "Total cross sections from a parametrisation(L.Urban). ";
G4String comments = "Total cross sections from a parametrisation. ";
comments += "Good description from 10 KeV to 50 MeV for all Z";
comments += "Sandia crossSection below 50 KeV";
G4cout << endl << GetProcessName() << ": " << comments
<< "\n PhysicsTables from " << G4BestUnit(LowestEnergyLimit,"Energy")
<< " to " << G4BestUnit(HighestEnergyLimit,"Energy")