Gabriele Cosmo
143 lines
5.6 KiB
C++
143 lines
5.6 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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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 *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4GammaConversionToMuons.hh,v 1.6 2004/05/11 18:22:20 vnivanch Exp $
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// GEANT4 tag $Name: geant4-06-02 $
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//
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// ------------ G4GammaConversionToMuons physics process ------
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// by H.Burkhardt, S. Kelner and R. Kokoulin, April 2002
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// -----------------------------------------------------------------------------
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// class description
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//
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// gamma ---> mu+ mu-
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// inherit from G4VDiscreteProcess
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//
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#ifndef G4GammaConversionToMuons_h
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#define G4GammaConversionToMuons_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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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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class G4GammaConversionToMuons : public G4VDiscreteProcess
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{
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public: // with description
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G4GammaConversionToMuons(const G4String& processName ="GammaToMuPair",
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G4ProcessType type = fElectromagnetic);
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~G4GammaConversionToMuons();
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G4bool IsApplicable(const G4ParticleDefinition&);
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// true for Gamma only.
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void BuildPhysicsTable(const G4ParticleDefinition&);
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// here dummy, the total cross section parametrization is used rather
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// than tables, just calling PrintInfoDefinition
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void PrintInfoDefinition();
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// Print few lines of informations about the process: validity range,
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// origine ..etc..
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// Invoked by BuildThePhysicsTable().
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void SetCrossSecFactor(G4double fac);
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// Set the factor to artificially increase the crossSection (default 1)
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G4double GetCrossSecFactor() { return CrossSecFactor;}
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// Get the factor to artificially increase the cross section
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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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// It returns the MeanFreePath of the process for the current track :
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// (energy, material)
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// The previousStepSize and G4ForceCondition* are not used.
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// This function overloads a virtual function of the base class.
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// It is invoked by the ProcessManager of the Particle.
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G4double GetCrossSectionPerAtom(const G4DynamicParticle* aDynamicGamma,
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G4Element* anElement);
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// It returns the total CrossSectionPerAtom of the process,
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// for the current DynamicGamma (energy), in anElement.
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G4VParticleChange* PostStepDoIt(const G4Track& aTrack,
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const G4Step& aStep);
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// It computes the final state of the process (at end of step),
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// returned as a ParticleChange object.
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// This function overloads a virtual function of the base class.
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// It is invoked by the ProcessManager of the Particle.
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protected:
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virtual G4double ComputeCrossSectionPerAtom(G4double GammaEnergy,
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G4double AtomicZ,G4double AtomicA);
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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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private:
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// hide assignment operator as private
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G4GammaConversionToMuons& operator=(const G4GammaConversionToMuons &right);
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G4GammaConversionToMuons(const G4GammaConversionToMuons& );
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private:
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G4double LowestEnergyLimit ; // low energy limit of the tables
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G4double HighestEnergyLimit ; // high energy limit of the tables
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G4double fminimalEnergy; // minimalEnergy of produced particles
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G4double MeanFreePath; // actual MeanFreePath (current medium)
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G4double CrossSecFactor; // factor to artificially increase
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// the cross section
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};
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#include "G4GammaConversionToMuons.icc"
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#endif
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