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1 //
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25 //
26 //
27 // -------------------------------------------------------------------
28 //
29 // GEANT4 Class file
30 //
31 //
32 // File name: G4hBetheBlochModel
33 //
34 // Author: V.Ivanchenko (Vladimir.Ivanchenko@cern.ch)
35 //
36 // Creation date: 20 July 2000
37 //
38 // Modifications:
39 // 20/07/2000 V.Ivanchenko First implementation
40 //
41 // Class Description:
42 //
43 // Bethe-Bloch ionisation model
44 // Further documentation available from http://www.ge.infn.it/geant4/lowE
45
46 // -------------------------------------------------------------------
47 //
48
49 #ifndef G4hBetheBlochModel_h
50 #define G4hBetheBlochModel_h 1
51
52 #include "globals.hh"
53 #include "G4VLowEnergyModel.hh"
54
55 class G4Material;
56 class G4ParticleDefinition;
57 class G4DynamicParticle;
58
59 class G4hBetheBlochModel : public G4VLowEnergyModel
60 {
61
62 public:
63
64 explicit G4hBetheBlochModel(const G4String& name) ;
65
66 ~G4hBetheBlochModel() ;
67
68 G4double TheValue(const G4DynamicParticle* particle,
69 const G4Material* material);
70
71 G4double TheValue(const G4ParticleDefinition* aParticle,
72 const G4Material* material,
73 G4double kineticEnergy);
74
75 G4double HighEnergyLimit(const G4ParticleDefinition* aParticle,
76 const G4Material* material) const;
77
78 G4double LowEnergyLimit(const G4ParticleDefinition* aParticle,
79 const G4Material* material) const;
80
81 G4double HighEnergyLimit(const G4ParticleDefinition* aParticle) const;
82
83 G4double LowEnergyLimit(const G4ParticleDefinition* aParticle) const;
84
85 G4bool IsInCharge(const G4DynamicParticle* particle,
86 const G4Material* material) const;
87
88 G4bool IsInCharge(const G4ParticleDefinition* aParticle,
89 const G4Material* material) const;
90
91 protected:
92
93 private:
94
95 G4double BetheBlochFormula(const G4Material* material,
96 G4double kineticEnergy,
97 G4double particleMass) const;
98
99 // constants needed for the energy loss calculation
100 const G4double twoln10;
101 const G4double bg2lim;
102 const G4double taulim; // energy to start to switch off shell corrections
103
104 // Low energy limit of the model
105 G4double lowEnergyLimit;
106 G4double highEnergyLimit;
107
108 };
109
110 #endif
111