Gabriele Cosmo
114 lines
3.7 KiB
C++
114 lines
3.7 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: G4GammaConversion.hh,v 1.1 1999/01/07 16:11:09 gunter Exp $
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// GEANT4 tag $Name: geant4-00-01 $
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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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// ------------ G4GammaConversion physics process ------
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// by Michel Maire, 24 May 1996
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// ************************************************************
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// 11-06-96, Added GetRandomAtom() 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 inplementation, M.Maire
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// 16-09-96, Dynamical array PartialSumSigma, M.Maire
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// 14-01-97, crossection table + meanfreepath table.
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// PartialSumSigma removed, M.Maire
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// 14-03-97, new physics scheme for geant4alpha, M.Maire
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// 13-08-98, new methods SetBining() PrintInfo()
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// ------------------------------------------------------------
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#ifndef G4GammaConversion_h
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#define G4GammaConversion_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 "G4Element.hh"
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#include "G4Gamma.hh"
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#include "G4Electron.hh"
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#include "G4Positron.hh"
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#include "G4Step.hh"
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class G4GammaConversion : public G4VDiscreteProcess
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{
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public:
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G4GammaConversion(const G4String& processName ="conv");
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~G4GammaConversion();
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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& GammaType);
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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 GetMicroscopicCrossSection(const G4DynamicParticle* aDynamicGamma,
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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 G4double ComputeMicroscopicCrossSection(G4double GammaEnergy,
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G4double AtomicNumber);
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virtual G4double ComputeMeanFreePath (G4double GammaEnergy,
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G4Material* aMaterial);
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private:
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G4Element* SelectRandomAtom(const G4DynamicParticle* aDynamicGamma,
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G4Material* aMaterial);
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G4double ScreenFunction1(G4double ScreenVariable);
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G4double ScreenFunction2(G4double ScreenVariable);
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private:
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// hide assignment operator as private
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G4GammaConversion& operator=(const G4GammaConversion &right);
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G4GammaConversion(const G4GammaConversion& );
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private:
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G4PhysicsTable* theCrossSectionTable; // table for crossection
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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 "G4GammaConversion.icc"
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#endif
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