Import Geant4 4.1.0 source tree

2016-06-08 16:39:52 +02:00
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+//
+// ********************************************************************
+// * DISCLAIMER                                                       *
+// *                                                                  *
+// * The following disclaimer summarizes all the specific disclaimers *
+// * of contributors to this software. The specific disclaimers,which *
+// * govern, are listed with their locations in:                      *
+// *   http://cern.ch/geant4/license                                  *
+// *                                                                  *
+// * Neither the authors of this software system, nor their employing *
+// * institutes,nor the agencies providing financial support for this *
+// * work  make  any representation or  warranty, express or implied, *
+// * regarding  this  software system or assume any liability for its *
+// * use.                                                             *
+// *                                                                  *
+// * 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: G4GammaConversionToMuons.hh,v 1.2 2002/05/06 09:32:41 maire Exp $
+// GEANT4 tag $Name: geant4-04-01 $
+//
+//         ------------ G4GammaConversionToMuons physics process ------
+//         by H.Burkhardt, S. Kelner and R. Kokoulin, April 2002
+// -----------------------------------------------------------------------------
+
+// class description
+//
+// gamma ---> mu+ mu-
+// inherit from G4VDiscreteProcess
+//
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
+
+#ifndef G4GammaConversionToMuons_h
+#define G4GammaConversionToMuons_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 G4GammaConversionToMuons : public G4VDiscreteProcess
+
+{
+  public:  // with description
+
+     G4GammaConversionToMuons(const G4String& processName ="GammaToMuPair");
+
+    ~G4GammaConversionToMuons();
+
+     G4bool IsApplicable(const G4ParticleDefinition&);
+       // true for Gamma only.
+
+     void BuildPhysicsTable(const G4ParticleDefinition&);
+       // here dummy, the total cross section parametrization is used rather
+       // than tables,  just calling PrintInfoDefinition
+
+     void PrintInfoDefinition();
+       // Print few lines of informations about the process: validity range,
+       // origine ..etc..
+       // Invoked by BuildThePhysicsTable().
+
+     void SetCrossSecFactor(G4double fac);
+       // Set the factor to artificially increase the crossSection (default 1)
+
+     G4double inline GetCrossSecFactor() { return CrossSecFactor;}
+       // Get the factor to artificially increase the cross section
+
+     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 GetCrossSectionPerAtom(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 ComputeCrossSectionPerAtom(G4double GammaEnergy,
+               G4double AtomicZ,G4double AtomicA);
+
+     virtual G4double ComputeMeanFreePath (G4double GammaEnergy,
+                                           G4Material* aMaterial);
+
+  private:
+
+     G4Element* SelectRandomAtom(const G4DynamicParticle* aDynamicGamma,
+                                 G4Material* aMaterial);
+
+  private:
+
+     // hide assignment operator as private
+     G4GammaConversionToMuons& operator=(const G4GammaConversionToMuons &right);
+     G4GammaConversionToMuons(const G4GammaConversionToMuons& );
+
+  private:
+
+     G4double LowestEnergyLimit ;     // low  energy limit of the tables
+     G4double HighestEnergyLimit ;    // high energy limit of the tables
+
+     G4double fminimalEnergy;         // minimalEnergy of produced particles
+
+     G4double MeanFreePath;           // actual MeanFreePath (current medium)
+     G4double CrossSecFactor;         // factor to artificially increase
+                                      // the cross section
+
+};
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
+
+#include "G4GammaConversionToMuons.icc"
+
+#endif
+