Gabriele Cosmo
139 lines
5.1 KiB
C++
139 lines
5.1 KiB
C++
// This code implementation is the intellectual property of
|
|
// the GEANT4 collaboration.
|
|
//
|
|
// By copying, distributing or modifying the Program (or any work
|
|
// based on the Program) you indicate your acceptance of this statement,
|
|
// and all its terms.
|
|
//
|
|
// $Id: G4GammaConversion.hh,v 1.4 1999/12/17 18:26:11 maire Exp $
|
|
// GEANT4 tag $Name: geant4-03-00 $
|
|
//
|
|
// ------------ G4GammaConversion physics process ------
|
|
// by Michel Maire, 24 May 1996
|
|
//
|
|
// 11-06-96, Added GetRandomAtom() method and new data member
|
|
// for cumulative total cross section, by M.Maire
|
|
// 21-06-96, SetCuts inplementation, M.Maire
|
|
// 16-09-96, Dynamical array PartialSumSigma, M.Maire
|
|
// 14-01-97, crossection table + meanfreepath table.
|
|
// PartialSumSigma removed, M.Maire
|
|
// 14-03-97, new physics scheme for geant4alpha, M.Maire
|
|
// 13-08-98, new methods SetBining() PrintInfo()
|
|
// ------------------------------------------------------------
|
|
|
|
// class description
|
|
//
|
|
// gamma ---> e+ e-
|
|
// inherit from G4VDiscreteProcess
|
|
//
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
|
|
|
|
#ifndef G4GammaConversion_h
|
|
#define G4GammaConversion_h 1
|
|
|
|
#include "G4ios.hh"
|
|
#include "globals.hh"
|
|
#include "Randomize.hh"
|
|
#include "G4VDiscreteProcess.hh"
|
|
#include "G4PhysicsTable.hh"
|
|
#include "G4PhysicsLogVector.hh"
|
|
#include "G4Element.hh"
|
|
#include "G4Gamma.hh"
|
|
#include "G4Electron.hh"
|
|
#include "G4Positron.hh"
|
|
#include "G4Step.hh"
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
|
|
|
|
class G4GammaConversion : public G4VDiscreteProcess
|
|
|
|
{
|
|
public: // with description
|
|
|
|
G4GammaConversion(const G4String& processName ="conv");
|
|
|
|
~G4GammaConversion();
|
|
|
|
G4bool IsApplicable(const G4ParticleDefinition&);
|
|
// true for Gamma only.
|
|
|
|
void SetPhysicsTableBining(G4double lowE, G4double highE, G4int nBins);
|
|
// Allows to define the binning of the PhysicsTables,
|
|
// before to build them.
|
|
|
|
void BuildPhysicsTable(const G4ParticleDefinition& GammaType);
|
|
// It builds the total CrossSectionPerAtom table, for Gamma,
|
|
// and for every element contained in the elementTable.
|
|
// It builds the MeanFreePath table, for Gamma,
|
|
// and for every material contained in the materialTable.
|
|
// This function overloads a virtual function of the base class.
|
|
// It is invoked by the G4ParticleWithCuts::SetCut() method.
|
|
|
|
void PrintInfoDefinition();
|
|
// Print few lines of informations about the process: validity range,
|
|
// origine ..etc..
|
|
// Invoked by BuildPhysicsTable().
|
|
|
|
G4double GetMeanFreePath(const G4Track& aTrack,
|
|
G4double previousStepSize,
|
|
G4ForceCondition* condition);
|
|
// It returns the MeanFreePath of the process for the current track :
|
|
// (energy, material)
|
|
// The previousStepSize and G4ForceCondition* are not used.
|
|
// This function overloads a virtual function of the base class.
|
|
// It is invoked by the ProcessManager of the Particle.
|
|
|
|
G4double GetMicroscopicCrossSection(const G4DynamicParticle* aDynamicGamma,
|
|
G4Element* anElement);
|
|
// It returns the total CrossSectionPerAtom of the process,
|
|
// for the current DynamicGamma (energy), in anElement.
|
|
|
|
G4VParticleChange* PostStepDoIt(const G4Track& aTrack,
|
|
const G4Step& aStep);
|
|
// It computes the final state of the process (at end of step),
|
|
// returned as a ParticleChange object.
|
|
// This function overloads a virtual function of the base class.
|
|
// It is invoked by the ProcessManager of the Particle.
|
|
|
|
protected:
|
|
|
|
virtual G4double ComputeMicroscopicCrossSection(G4double GammaEnergy,
|
|
G4double AtomicNumber);
|
|
|
|
virtual G4double ComputeMeanFreePath (G4double GammaEnergy,
|
|
G4Material* aMaterial);
|
|
|
|
private:
|
|
|
|
G4Element* SelectRandomAtom(const G4DynamicParticle* aDynamicGamma,
|
|
G4Material* aMaterial);
|
|
|
|
G4double ScreenFunction1(G4double ScreenVariable);
|
|
|
|
G4double ScreenFunction2(G4double ScreenVariable);
|
|
|
|
private:
|
|
|
|
// hide assignment operator as private
|
|
G4GammaConversion& operator=(const G4GammaConversion &right);
|
|
G4GammaConversion(const G4GammaConversion& );
|
|
|
|
private:
|
|
|
|
G4PhysicsTable* theCrossSectionTable; // table for crossection
|
|
G4PhysicsTable* theMeanFreePathTable;
|
|
|
|
G4double LowestEnergyLimit ; // low energy limit of the crossection formula
|
|
G4double HighestEnergyLimit ; // high energy limit of the crossection formula
|
|
G4int NumbBinTable ; // number of bins in the crossection table
|
|
|
|
G4double MeanFreePath; // actual Mean Free Path (current medium)
|
|
};
|
|
|
|
#include "G4GammaConversion.icc"
|
|
|
|
#endif
|
|
|