Import Geant4 4.1.0 source tree
This commit is contained in:
Gabriele Cosmo
@@ -21,8 +21,8 @@
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// ********************************************************************
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//
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//
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// $Id: G4PhotoElectricEffect.cc,v 1.22 2001/10/01 15:00:29 maire Exp $
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// GEANT4 tag $Name: geant4-04-00 $
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// $Id: G4PhotoElectricEffect.cc,v 1.27 2002/05/02 11:37:22 maire Exp $
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// GEANT4 tag $Name: geant4-04-01 $
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//
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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@@ -48,9 +48,14 @@
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// 06-08-01, new methods Store/Retrieve PhysicsTable (mma)
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// 06-08-01, BuildThePhysicsTable() called from constructor (mma)
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// 17-09-01, migration of Materials to pure STL (mma)
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// 20-09-01, DoIt: fminimalEnergy = 1*eV (mma)
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// 20-09-01, DoIt: fminimalEnergy of generated electron = 1*eV (mma)
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// 01-10-01, come back to BuildPhysicsTable(const G4ParticleDefinition&)
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//
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// 10-01-02, moved few function from icc to cc
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// 17-04-02, Keep only Sandia crossSections. Remove BuildPhysicsTables.
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// Simplify public interface (mma)
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// 29-04-02, Generate theta angle of the photoelectron from Sauter-Gavrila
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// distribution (mma)
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//
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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@@ -62,180 +67,56 @@
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// constructor
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G4PhotoElectricEffect::G4PhotoElectricEffect(const G4String& processName)
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: G4VDiscreteProcess (processName), // initialization
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theCrossSectionTable(NULL),
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theMeanFreePathTable(NULL),
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LowestEnergyLimit (50*keV),
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HighestEnergyLimit(50*MeV),
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NumbBinTable(100),
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: G4VDiscreteProcess (processName),
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fminimalEnergy(1*eV)
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{}
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{ PrintInfoDefinition();}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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// destructor
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G4PhotoElectricEffect::~G4PhotoElectricEffect()
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{
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if (theCrossSectionTable) {
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theCrossSectionTable->clearAndDestroy();
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delete theCrossSectionTable;
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}
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if (theMeanFreePathTable) {
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theMeanFreePathTable->clearAndDestroy();
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delete theMeanFreePathTable;
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}
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}
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{ }
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void G4PhotoElectricEffect::SetPhysicsTableBining(
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G4double lowE, G4double highE, G4int nBins)
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{
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LowestEnergyLimit = lowE; HighestEnergyLimit = highE; NumbBinTable = nBins;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void G4PhotoElectricEffect::BuildPhysicsTable(const G4ParticleDefinition&)
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// Build cross section per atom and mean free path tables
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{
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G4double LowEdgeEnergy, Value;
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G4PhysicsLogVector* ptrVector;
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// Build cross section per atom tables for the Photo Electric Effect
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if (theCrossSectionTable) {
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theCrossSectionTable->clearAndDestroy(); delete theCrossSectionTable;}
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theCrossSectionTable = new G4PhysicsTable( G4Element::GetNumberOfElements());
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const G4ElementTable* theElementTable = G4Element::GetElementTable();
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G4double AtomicNumber;
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size_t J;
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for ( J=0 ; J < G4Element::GetNumberOfElements(); J++ )
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{
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//create physics vector then fill it ....
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ptrVector = new G4PhysicsLogVector(LowestEnergyLimit,HighestEnergyLimit,
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NumbBinTable ) ;
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AtomicNumber = (*theElementTable)[J]->GetZ();
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for ( G4int i = 0 ; i < NumbBinTable ; i++ )
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{
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LowEdgeEnergy = ptrVector->GetLowEdgeEnergy( i ) ;
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Value = ComputeCrossSectionPerAtom( LowEdgeEnergy, AtomicNumber);
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ptrVector->PutValue( i , Value ) ;
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}
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theCrossSectionTable->insertAt( J , ptrVector ) ;
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}
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// Build mean free path table for the Photo Electric Effect
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if (theMeanFreePathTable) {
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theMeanFreePathTable->clearAndDestroy(); delete theMeanFreePathTable;}
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theMeanFreePathTable= new G4PhysicsTable(G4Material::GetNumberOfMaterials());
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const G4MaterialTable* theMaterialTable = G4Material::GetMaterialTable() ;
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G4Material* material;
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for ( J=0 ; J < G4Material::GetNumberOfMaterials(); J++ )
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{
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//create physics vector then fill it ....
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ptrVector = new G4PhysicsLogVector(LowestEnergyLimit,HighestEnergyLimit,
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NumbBinTable );
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material = (*theMaterialTable)[J];
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for ( G4int i = 0 ; i < NumbBinTable ; i++ )
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{
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LowEdgeEnergy = ptrVector->GetLowEdgeEnergy( i ) ;
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Value = ComputeMeanFreePath( LowEdgeEnergy, material);
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ptrVector->PutValue( i , Value ) ;
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}
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theMeanFreePathTable->insertAt( J , ptrVector ) ;
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}
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PrintInfoDefinition();
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4double G4PhotoElectricEffect::ComputeCrossSectionPerAtom(
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G4double PhotonEnergy,
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G4double AtomicNumber)
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// Calculates the cross section per atom in GEANT4 internal units.
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// A parametrized formula from L. Urban is used to estimate the
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// total cross section.
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// It gives a good description of the elements : 5 < Atomic Number < 100 and
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// from 10 keV to 50 MeV.
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{
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G4double CrossSection = 0.0 ;
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if ( AtomicNumber < 1. ) return CrossSection;
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if ( PhotonEnergy > 50.*MeV ) return CrossSection;
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static const G4double
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p1K =-8.8893e+2*nanobarn, p2K = 2.4394 *nanobarn, p3K = 2.8835e+2*nanobarn,
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p4K = 1.2133e+1*nanobarn, p5K =-3.1104e+2*nanobarn, p6K =-1.7284e-1*nanobarn,
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p7K = 1.4400e+1*nanobarn, p8K = 6.8357e+1*nanobarn, p9K = 7.3945e-4*nanobarn,
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p10K=-4.8149e-2*nanobarn, p11K= 5.5823e-1*nanobarn, p12K=-1.0089e-1*nanobarn;
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static const G4double
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p1L1=-1.0927e+3*nanobarn, p2L1=-9.7897e-1*nanobarn, p3L1= 1.2854e+2*nanobarn;
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static const G4double
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p1L2=-4.5803e+3*nanobarn, p2L2= 1.6858e-3*nanobarn, p3L2= 1.2013e+2*nanobarn;
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static const G4double
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p1M = 1.6924e+1*nanobarn;
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const G4double pwZ = 3.845 , pwE = 2.975 ;
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G4double Z = AtomicNumber, Z2 = Z*Z, Z3 = Z*Z*Z;
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G4double Em = PhotonEnergy/electron_mass_c2, Em2 = Em*Em, Em3 = Em*Em*Em;
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CrossSection = pow(Z,pwZ)/pow(Em,pwE);
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if (PhotonEnergy > ComputeKBindingEnergy(Z) ) {
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CrossSection *= (p1K/Z + p2K/Em + p3K + p4K*Z + p5K*Em
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+ p6K*Z2 + p7K *Z *Em + p8K *Em2
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+ p9K*Z3 + p10K*Z2*Em + p11K*Z*Em2 + p12K*Em3);
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if (CrossSection < 0.) CrossSection = 0. ;
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}
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else if (PhotonEnergy > ComputeL1BindingEnergy(Z) ) {
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CrossSection *= (p1L1/Z + p2L1/Em + p3L1 );
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if (CrossSection < 0.) CrossSection = 0. ;
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}
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else if (PhotonEnergy > ComputeL2BindingEnergy(Z) ) {
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CrossSection *= (p1L2/Z + p2L2/Em + p3L2 );
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if (CrossSection < 0.) CrossSection = 0. ;
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}
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else CrossSection *= p1M;
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return CrossSection;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4double G4PhotoElectricEffect::ComputeSandiaCrossSection(G4double PhotonEnergy,
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G4double G4PhotoElectricEffect::ComputeCrossSectionPerAtom(G4double GammaEnergy,
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G4double AtomicNumber)
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{
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G4double energy2 = PhotonEnergy*PhotonEnergy, energy3 = PhotonEnergy*energy2,
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energy4 = energy2*energy2;
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G4double* SandiaCof
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= G4SandiaTable::GetSandiaCofPerAtom((int)AtomicNumber,PhotonEnergy);
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// returns the photoElectric cross Section in GEANT4 internal units
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{
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G4double* SandiaCof
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= G4SandiaTable::GetSandiaCofPerAtom((int)AtomicNumber,GammaEnergy);
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G4double energy2 = GammaEnergy*GammaEnergy, energy3 = GammaEnergy*energy2,
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energy4 = energy2*energy2;
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return SandiaCof[0]/PhotonEnergy + SandiaCof[1]/energy2 +
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SandiaCof[2]/energy3 + SandiaCof[3]/energy4;
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return SandiaCof[0]/GammaEnergy + SandiaCof[1]/energy2 +
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SandiaCof[2]/energy3 + SandiaCof[3]/energy4;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4double G4PhotoElectricEffect::ComputeMeanFreePath(G4double GammaEnergy,
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G4Material* aMaterial)
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// returns the gamma mean free path in GEANT4 internal units
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{
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G4double* SandiaCof = aMaterial->GetSandiaTable()
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->GetSandiaCofForMaterial(GammaEnergy);
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G4double energy2 = GammaEnergy*GammaEnergy, energy3 = GammaEnergy*energy2,
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energy4 = energy2*energy2;
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G4double SIGMA = SandiaCof[0]/GammaEnergy + SandiaCof[1]/energy2 +
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SandiaCof[2]/energy3 + SandiaCof[3]/energy4;
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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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G4VParticleChange* G4PhotoElectricEffect::PostStepDoIt(const G4Track& aTrack,
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@@ -271,11 +152,19 @@ G4VParticleChange* G4PhotoElectricEffect::PostStepDoIt(const G4Track& aTrack,
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if (ElecKineEnergy > fminimalEnergy)
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{
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// the electron is created in the direction of the incident photon ...
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// direction of the photo electron
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//
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G4double cosTeta = ElecThetaDistribution(ElecKineEnergy);
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G4double sinTeta = sqrt(1.-cosTeta*cosTeta);
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G4double Phi = twopi * G4UniformRand();
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G4double dirx = sinTeta*cos(Phi),diry = sinTeta*sin(Phi),dirz = cosTeta;
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G4ThreeVector ElecDirection(dirx,diry,dirz);
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ElecDirection.rotateUz(PhotonDirection);
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//
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G4DynamicParticle* aElectron = new G4DynamicParticle (
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G4Electron::Electron(),PhotonDirection, ElecKineEnergy);
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G4Electron::Electron(),ElecDirection, ElecKineEnergy);
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aParticleChange.SetNumberOfSecondaries(1);
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aParticleChange.AddSecondary( aElectron );
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aParticleChange.AddSecondary(aElectron);
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}
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else
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{
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@@ -306,6 +195,7 @@ G4Element* G4PhotoElectricEffect::SelectRandomAtom(
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const G4ElementVector* theElementVector = aMaterial->GetElementVector();
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if (NumberOfElements == 1) return (*theElementVector)[0];
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G4double GammaEnergy = aDynamicPhoton->GetKineticEnergy();
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const G4double* NbOfAtomsPerVolume = aMaterial->GetVecNbOfAtomsPerVolume();
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G4double PartialSumSigma = 0. ;
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@@ -313,8 +203,8 @@ G4Element* G4PhotoElectricEffect::SelectRandomAtom(
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for ( G4int elm=0 ; elm < NumberOfElements ; elm++ )
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{PartialSumSigma += NbOfAtomsPerVolume[elm] *
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GetCrossSectionPerAtom(aDynamicPhoton,
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(*theElementVector)[elm]);
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ComputeCrossSectionPerAtom(GammaEnergy,
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(*theElementVector)[elm]->GetZ());
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if (rval<=PartialSumSigma*MeanFreePath) return ((*theElementVector)[elm]);
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}
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return ((*theElementVector)[NumberOfElements-1]);
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@@ -322,90 +212,37 @@ G4Element* G4PhotoElectricEffect::SelectRandomAtom(
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4bool G4PhotoElectricEffect::StorePhysicsTable(G4ParticleDefinition* particle,
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const G4String& directory,
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G4bool ascii)
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G4double G4PhotoElectricEffect::ElecThetaDistribution(G4double kineEnergy)
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{
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G4String filename;
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// store cross section table
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filename = GetPhysicsTableFileName(particle,directory,"CrossSection",ascii);
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if ( !theCrossSectionTable->StorePhysicsTable(filename, ascii) ){
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G4cout << " FAIL theCrossSectionTable->StorePhysicsTable in " << filename
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<< G4endl;
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return false;
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}
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// store mean free path table
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filename = GetPhysicsTableFileName(particle,directory,"MeanFreePath",ascii);
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if ( !theMeanFreePathTable->StorePhysicsTable(filename, ascii) ){
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G4cout << " FAIL theMeanFreePathTable->StorePhysicsTable in " << filename
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<< G4endl;
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return false;
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}
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// Compute Theta distribution of the emitted electron, with respect to the
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// incident Gamma.
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// The Sauter-Gavrila distribution for the K-shell is used.
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//
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G4double gamma = 1. + kineEnergy/electron_mass_c2;
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G4double beta = sqrt(gamma*gamma-1.)/gamma;
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G4double b = 0.5*gamma*(gamma-1.)*(gamma-2);
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G4double rndm,costeta,term,greject,grejsup;
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if (gamma < 2.) grejsup = gamma*gamma*(1.+b-beta*b);
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else grejsup = gamma*gamma*(1.+b+beta*b);
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G4cout << GetProcessName() << " for " << particle->GetParticleName()
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<< ": Success to store the PhysicsTables in "
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<< directory << G4endl;
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return true;
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}
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do { rndm = 1.-2*G4UniformRand();
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costeta = (rndm+beta)/(rndm*beta+1.);
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term = 1.-beta*costeta;
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greject = (1.-costeta*costeta)*(1.+b*term)/(term*term);
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} while(greject < G4UniformRand()*grejsup);
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return costeta;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4bool G4PhotoElectricEffect::RetrievePhysicsTable(
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G4ParticleDefinition* particle,
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const G4String& directory,
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G4bool ascii)
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{
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// delete theCrossSectionTable and theMeanFreePathTable
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if (theCrossSectionTable != 0) {
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theCrossSectionTable->clearAndDestroy();
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delete theCrossSectionTable;
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}
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if (theMeanFreePathTable != 0) {
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theMeanFreePathTable->clearAndDestroy();
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delete theMeanFreePathTable;
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}
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G4String filename;
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// retreive cross section table
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filename = GetPhysicsTableFileName(particle,directory,"CrossSection",ascii);
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theCrossSectionTable = new G4PhysicsTable(G4Element::GetNumberOfElements());
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if ( !theCrossSectionTable->RetrievePhysicsTable(filename, ascii) ){
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G4cout << " FAIL theCrossSectionTable->RetrievePhysicsTable in " << filename
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<< G4endl;
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return false;
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}
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// retreive mean free path table
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filename = GetPhysicsTableFileName(particle,directory,"MeanFreePath",ascii);
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theMeanFreePathTable = new G4PhysicsTable(G4Material::GetNumberOfMaterials());
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if ( !theMeanFreePathTable->RetrievePhysicsTable(filename, ascii) ){
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G4cout << " FAIL theMeanFreePathTable->RetrievePhysicsTable in " << filename
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<< G4endl;
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return false;
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}
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G4cout << GetProcessName() << " for " << particle->GetParticleName()
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<< ": Success to retrieve the PhysicsTables from "
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<< directory << G4endl;
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return true;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void G4PhotoElectricEffect::PrintInfoDefinition()
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{
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G4String comments = "Total cross sections from a parametrisation. ";
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comments += "Good description from 10 KeV to 50 MeV for all Z";
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comments += "\n Sandia crossSection below 50 KeV";
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G4String comments = "Total cross sections from Sandia parametrisation. ";
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G4cout << G4endl << GetProcessName() << ": " << comments
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<< "\n PhysicsTables from "
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<< G4BestUnit(LowestEnergyLimit, "Energy")
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<< " to " << G4BestUnit(HighestEnergyLimit,"Energy")
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<< " in " << NumbBinTable << " bins. \n";
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G4cout << G4endl << GetProcessName() << ": " << comments << G4endl;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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