Gabriele Cosmo
120 lines
4.0 KiB
C++
120 lines
4.0 KiB
C++
// This code implementation is the intellectual property of
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// the RD44 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: G4PhotoAbsorption.hh,v 2.2 1998/11/11 16:13:10 maire Exp $
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// GEANT4 tag $Name: geant4-00 $
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//
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//
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// ------------------------------------------------------------
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// GEANT 4 class header file
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// CERN Geneva Switzerland
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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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// ------------ G4PhotoElectricEffect physics process ------
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// by Michel Maire, April 1996
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// ************************************************************
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// 12-06-96, Added SelectRandomAtom() method and new data member
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// for cumulative total cross section, by M.Maire
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// 21-06-96, SetCuts implementation, M.Maire
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// 17-09-96, Dynamic array PartialSumSigma
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// split ComputeBindingEnergy(), M.Maire
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// 08-01-97, crossection table + meanfreepath table, M.Maire
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// 13-03-97, adapted for the new physics scheme, M.Maire
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// 13-08-98, new methods SetBining() PrintInfo()
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// 10-11-98, new treatment of energies < 50 keV, V.Grichine
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// ------------------------------------------------------------
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#ifndef G4PhotoAbsorption_h
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#define G4PhotoAbsorption_h 1
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#include "G4ios.hh"
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#include "globals.hh"
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#include "Randomize.hh"
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#include "G4VDiscreteProcess.hh"
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#include "G4PhysicsTable.hh"
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#include "G4PhysicsLogVector.hh"
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#include "G4ElementTable.hh"
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#include "G4Gamma.hh"
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#include "G4Electron.hh"
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#include "G4Step.hh"
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class G4PhotoAbsorption : public G4VDiscreteProcess
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{
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public:
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G4PhotoAbsorption(const G4String& processName ="photAbs");
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~G4PhotoAbsorption();
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G4bool IsApplicable(const G4ParticleDefinition&);
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void SetPhysicsTableBining(G4double lowE, G4double highE, G4int nBins);
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void BuildPhysicsTable(const G4ParticleDefinition& PhotonType);
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void PrintInfoDefinition();
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G4double GetMeanFreePath(const G4Track& aTrack,
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G4double previousStepSize,
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G4ForceCondition* condition);
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G4double GetCrossSectionPerAtom(const G4DynamicParticle* aDynamicPhoton,
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G4Element* anElement);
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G4VParticleChange* PostStepDoIt(const G4Track& aTrack,
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const G4Step& aStep);
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protected:
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virtual inline G4double ComputeKBindingEnergy(G4double AtomicNumber);
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virtual inline G4double ComputeL1BindingEnergy(G4double AtomicNumber);
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virtual inline G4double ComputeL2BindingEnergy(G4double AtomicNumber);
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virtual G4double ComputeCrossSectionPerAtom(G4double PhotonEnergy,
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G4double AtomicNumber);
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virtual G4double ComputeMeanFreePath(G4double PhotonEnergy,
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G4Material* aMaterial);
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G4double ComputeSandiaMeanFreePath(G4double PhotonEnergy,
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G4Material* aMaterial);
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private:
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G4Element* SelectRandomAtom(const G4DynamicParticle* aDynamicPhoton,
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G4Material* aMaterial);
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private:
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// hide assignment operator as private
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G4PhotoAbsorption& operator=(const G4PhotoAbsorption &right);
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G4PhotoAbsorption(const G4PhotoAbsorption& );
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private:
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G4PhysicsTable* theCrossSectionTable;
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G4PhysicsTable* theMeanFreePathTable;
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G4double LowestEnergyLimit ; // low energy limit of the crossection formula
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G4double HighestEnergyLimit ; // high energy limit of the crossection formula
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G4int NumbBinTable ; // number of bins in the crossection table
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G4double MeanFreePath; // actual Mean Free Path (current medium)
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};
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#include "G4PhotoAbsorption.icc"
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#endif
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