Import Geant4 0.0.0 source tree

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+// This code implementation is the intellectual property of
+// the RD44 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: G4PhotoAbsorption.hh,v 2.2 1998/11/11 16:13:10 maire Exp $
+// GEANT4 tag $Name: geant4-00 $
+//
+// 
+// ------------------------------------------------------------
+//      GEANT 4 class header file
+//      CERN Geneva Switzerland
+//
+//      For information related to this code contact:
+//      CERN, CN Division, ASD group
+//      History: first implementation, based on object model of
+//      2nd December 1995, G.Cosmo
+//      ------------ G4PhotoElectricEffect physics process ------
+//                   by Michel Maire, April 1996
+// ************************************************************
+// 12-06-96, Added SelectRandomAtom() method and new data member
+//           for cumulative total cross section, by M.Maire
+// 21-06-96, SetCuts implementation, M.Maire
+// 17-09-96, Dynamic array PartialSumSigma
+//           split ComputeBindingEnergy(), M.Maire
+// 08-01-97, crossection table + meanfreepath table, M.Maire
+// 13-03-97, adapted for the new physics scheme, M.Maire
+// 13-08-98, new methods SetBining() PrintInfo() 
+// 10-11-98, new treatment of energies < 50 keV, V.Grichine 
+// ------------------------------------------------------------
+
+#ifndef G4PhotoAbsorption_h
+#define G4PhotoAbsorption_h 1
+
+#include "G4ios.hh" 
+#include "globals.hh"
+#include "Randomize.hh" 
+#include "G4VDiscreteProcess.hh"
+#include "G4PhysicsTable.hh"
+#include "G4PhysicsLogVector.hh"
+#include "G4ElementTable.hh"
+#include "G4Gamma.hh" 
+#include "G4Electron.hh"
+#include "G4Step.hh" 
+ 
+class G4PhotoAbsorption : public G4VDiscreteProcess
+ 
+{
+  public:
+ 
+     G4PhotoAbsorption(const G4String& processName ="photAbs");
+ 
+    ~G4PhotoAbsorption();
+
+     G4bool IsApplicable(const G4ParticleDefinition&);
+     
+     void SetPhysicsTableBining(G4double lowE, G4double highE, G4int nBins);
+
+     void BuildPhysicsTable(const G4ParticleDefinition& PhotonType);
+     
+     void PrintInfoDefinition();
+     
+     G4double GetMeanFreePath(const G4Track&    aTrack,
+                              G4double          previousStepSize,
+                              G4ForceCondition* condition);
+ 
+     G4double GetCrossSectionPerAtom(const G4DynamicParticle* aDynamicPhoton,
+                                           G4Element*         anElement);
+
+     G4VParticleChange* PostStepDoIt(const G4Track& aTrack,
+                                     const G4Step& aStep);
+ 
+  protected:
+
+     virtual inline G4double ComputeKBindingEnergy(G4double AtomicNumber);
+
+     virtual inline G4double ComputeL1BindingEnergy(G4double AtomicNumber);
+
+     virtual inline G4double ComputeL2BindingEnergy(G4double AtomicNumber);
+
+     virtual G4double ComputeCrossSectionPerAtom(G4double PhotonEnergy, 
+                                                 G4double AtomicNumber);
+
+     virtual G4double ComputeMeanFreePath(G4double PhotonEnergy, 
+                                          G4Material* aMaterial);
+
+
+     G4double ComputeSandiaMeanFreePath(G4double PhotonEnergy, 
+                                        G4Material* aMaterial);
+
+
+  private:
+
+     G4Element* SelectRandomAtom(const G4DynamicParticle* aDynamicPhoton,
+                                 G4Material* aMaterial);
+  private:
+  
+  // hide assignment operator as private 
+  G4PhotoAbsorption& operator=(const G4PhotoAbsorption &right);
+  G4PhotoAbsorption(const G4PhotoAbsorption& ); 
+      
+  private:
+  
+     G4PhysicsTable* theCrossSectionTable;  
+     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 "G4PhotoAbsorption.icc"
+  
+#endif
+