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0001 //
0002 // ********************************************************************
0003 // * License and Disclaimer                                           *
0004 // *                                                                  *
0005 // * The  Geant4 software  is  copyright of the Copyright Holders  of *
0006 // * the Geant4 Collaboration.  It is provided  under  the terms  and *
0007 // * conditions of the Geant4 Software License,  included in the file *
0008 // * LICENSE and available at  http://cern.ch/geant4/license .  These *
0009 // * include a list of copyright holders.                             *
0010 // *                                                                  *
0011 // * Neither the authors of this software system, nor their employing *
0012 // * institutes,nor the agencies providing financial support for this *
0013 // * work  make  any representation or  warranty, express or implied, *
0014 // * regarding  this  software system or assume any liability for its *
0015 // * use.  Please see the license in the file  LICENSE  and URL above *
0016 // * for the full disclaimer and the limitation of liability.         *
0017 // *                                                                  *
0018 // * This  code  implementation is the result of  the  scientific and *
0019 // * technical work of the GEANT4 collaboration.                      *
0020 // * By using,  copying,  modifying or  distributing the software (or *
0021 // * any work based  on the software)  you  agree  to acknowledge its *
0022 // * use  in  resulting  scientific  publications,  and indicate your *
0023 // * acceptance of all terms of the Geant4 Software license.          *
0024 // ********************************************************************
0025 //
0026 //
0027 // -------------------------------------------------------------------
0028 //
0029 // GEANT4 Class file
0030 //
0031 //
0032 // File name:     G4hBetheBlochModel
0033 //
0034 // Author:        V.Ivanchenko (Vladimir.Ivanchenko@cern.ch)
0035 // 
0036 // Creation date: 20 July 2000
0037 //
0038 // Modifications: 
0039 // 20/07/2000  V.Ivanchenko First implementation
0040 //
0041 // Class Description: 
0042 //
0043 // Bethe-Bloch ionisation model
0044 // Further documentation available from http://www.ge.infn.it/geant4/lowE
0045 
0046 // -------------------------------------------------------------------
0047 //
0048 
0049 #ifndef G4hBetheBlochModel_h
0050 #define G4hBetheBlochModel_h 1
0051 
0052 #include "globals.hh"
0053 #include "G4VLowEnergyModel.hh"
0054 
0055 class G4Material;
0056 class G4ParticleDefinition;
0057 class G4DynamicParticle;
0058 
0059 class G4hBetheBlochModel : public G4VLowEnergyModel
0060 {
0061 
0062 public:
0063 
0064   explicit G4hBetheBlochModel(const G4String& name) ;
0065 
0066   ~G4hBetheBlochModel() ;
0067 
0068   G4double TheValue(const G4DynamicParticle* particle,
0069                       const G4Material* material);
0070 
0071   G4double TheValue(const G4ParticleDefinition* aParticle,
0072                       const G4Material* material,
0073                                 G4double kineticEnergy);
0074 
0075   G4double HighEnergyLimit(const G4ParticleDefinition* aParticle,
0076                            const G4Material* material) const;
0077 
0078   G4double LowEnergyLimit(const G4ParticleDefinition* aParticle,
0079                           const G4Material* material) const;
0080 
0081   G4double HighEnergyLimit(const G4ParticleDefinition* aParticle) const;
0082 
0083   G4double LowEnergyLimit(const G4ParticleDefinition* aParticle) const;
0084  
0085   G4bool IsInCharge(const G4DynamicParticle* particle,
0086             const G4Material* material) const;
0087 
0088   G4bool IsInCharge(const G4ParticleDefinition* aParticle,
0089             const G4Material* material) const;
0090 
0091 protected:
0092 
0093 private:
0094 
0095   G4double BetheBlochFormula(const G4Material* material,
0096                                    G4double kineticEnergy,
0097                                    G4double particleMass) const;
0098 
0099   // constants needed for the energy loss calculation  
0100   const G4double twoln10;
0101   const G4double bg2lim;
0102   const G4double taulim;    // energy to start to switch off shell corrections
0103 
0104   // Low energy limit of the model
0105   G4double lowEnergyLimit;
0106   G4double highEnergyLimit;
0107 
0108 };
0109 
0110 #endif