Import Geant4 5.1.0 source tree

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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.                                    *
+// ********************************************************************
+//
+//
+// -------------------------------------------------------------------
+//
+// GEANT4 Class header file
+//
+//
+// File name:     G4IonFluctuations
+//
+// Author:        Vladimir Ivanchenko
+// 
+// Creation date: 02.04.2003
+//
+// Modifications:
+//
+// Class Description:
+//
+// Implementation of ion energy loss fluctuations
+
+// -------------------------------------------------------------------
+//
+
+#ifndef G4IonFluctuations_h
+#define G4IonFluctuations_h 1
+
+
+#include "G4VEmFluctuationModel.hh"
+
+class G4IonFluctuations : public G4VEmFluctuationModel
+{
+
+public:
+
+  G4IonFluctuations(const G4String& nam = "IonFluc");
+
+  ~G4IonFluctuations();
+
+  G4double SampleFluctuations(const G4Material*,
+                              const G4DynamicParticle*,
+                                    G4double&,
+                                    G4double&,
+                                    G4double&);
+
+  G4double Dispersion(    const G4Material*,
+                          const G4DynamicParticle*,
+ 				G4double&,
+                                G4double&);
+
+  void Initialise(const G4ParticleDefinition*);
+
+private:
+
+  G4double CoeffitientA(G4double&);
+  G4double CoeffitientB(const G4Material*, G4double&);
+
+  // hide assignment operator
+  G4IonFluctuations & operator=(const  G4IonFluctuations &right);
+  G4IonFluctuations(const  G4IonFluctuations&);
+
+  const G4ParticleDefinition* particle;
+
+  G4double particleMass;
+  G4double charge;
+  G4double chargeSquare;
+
+  // data members to speed up the fluctuation calculation
+  G4double minNumberInteractionsBohr;
+  G4double theBohrBeta2;
+  G4double minFraction;
+  // cash
+  G4double kineticEnergy;
+  G4double beta2;
+};
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
+
+#endif
+