Import Geant4 3.0.0 source tree

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+// 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.
+//
+// -------------------------------------------------------------------
+//
+// GEANT4 Class file
+//
+// For information related to this code contact:
+// Geant4 Collaboration
+//
+// File name:     G4hBetheBlochModel
+//
+// Author:        V.Ivanchenko (Vladimir.Ivanchenko@cern.ch)
+// 
+// Creation date: 20 July 2000
+//
+// Modifications: 
+// 20/07/2000  V.Ivanchenko First implementation
+//
+// Class Description: 
+//
+// Bethe-Bloch ionisation model
+// Further documentation available from http://www.ge.infn.it/geant4/lowE
+
+// -------------------------------------------------------------------
+//
+
+#ifndef G4hBetheBlochModel_h
+#define G4hBetheBlochModel_h 1
+
+#include "G4VLowEnergyModel.hh"
+
+class G4hBetheBlochModel : public G4VLowEnergyModel
+{
+
+public:
+
+  G4hBetheBlochModel(const G4String& name) ;
+
+  ~G4hBetheBlochModel() ;
+
+  G4double TheValue(const G4DynamicParticle* particle,
+	       	          const G4Material* material);
+
+  G4double TheValue(const G4ParticleDefinition* aParticle,
+       		          const G4Material* material,
+                                G4double kineticEnergy);
+
+  G4double HighEnergyLimit(const G4ParticleDefinition* aParticle,
+                           const G4Material* material) const;
+
+  G4double LowEnergyLimit(const G4ParticleDefinition* aParticle,
+                          const G4Material* material) const;
+
+  G4double HighEnergyLimit(const G4ParticleDefinition* aParticle) const;
+
+  G4double LowEnergyLimit(const G4ParticleDefinition* aParticle) const;
+ 
+  G4bool IsInCharge(const G4DynamicParticle* particle,
+		    const G4Material* material) const;
+
+  G4bool IsInCharge(const G4ParticleDefinition* aParticle,
+		    const G4Material* material) const;
+
+protected:
+
+private:
+
+  G4double BetheBlochFormula(const G4Material* material,
+                                   G4double kineticEnergy,
+                                   G4double particleMass) const;
+
+  // Low energy limit of the model
+  G4double lowEnergyLimit;
+  G4double highEnergyLimit;
+
+  // constants needed for the energy loss calculation
+  
+  const G4double twoln10;
+  const G4double bg2lim;
+  const G4double taulim;    // energy to start to switch off shell corrections
+
+};
+
+#endif