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25 //
26 //
27 // -------------------------------------------------------------------
28 //
29 // GEANT4 Class header file
30 //
31 //
32 // File name: G4BetheBlochModel
33 //
34 // Author: Vladimir Ivanchenko on base of Laszlo Urban code
35 //
36 // Creation date: 03.01.2002
37 //
38 // Modifications:
39 //
40 // Modified by Michel Maire and Vladimir Ivanchenko
41 //
42 // Class Description:
43 //
44 // Implementation of Bethe-Bloch model of energy loss and
45 // delta-electron production by heavy charged particles
46
47 // -------------------------------------------------------------------
48 //
49
50 #ifndef G4BetheBlochModel_h
51 #define G4BetheBlochModel_h 1
52
53 #include "G4VEmModel.hh"
54
55 class G4EmCorrections;
56 class G4ParticleChangeForLoss;
57 class G4ICRU90StoppingData;
58 class G4NistManager;
59
60 class G4BetheBlochModel : public G4VEmModel
61 {
62
63 public:
64
65 explicit G4BetheBlochModel(const G4ParticleDefinition* p = nullptr,
66 const G4String& nam = "BetheBloch");
67
68 ~G4BetheBlochModel() override;
69
70 void Initialise(const G4ParticleDefinition*, const G4DataVector&) override;
71
72 G4double MinEnergyCut(const G4ParticleDefinition*,
73 const G4MaterialCutsCouple* couple) override;
74
75 virtual G4double ComputeCrossSectionPerElectron(
76 const G4ParticleDefinition*,
77 G4double kineticEnergy,
78 G4double cutEnergy,
79 G4double maxEnergy);
80
81 G4double ComputeCrossSectionPerAtom(
82 const G4ParticleDefinition*,
83 G4double kineticEnergy,
84 G4double Z, G4double A,
85 G4double cutEnergy,
86 G4double maxEnergy) override;
87
88 G4double CrossSectionPerVolume(const G4Material*,
89 const G4ParticleDefinition*,
90 G4double kineticEnergy,
91 G4double cutEnergy,
92 G4double maxEnergy) override;
93
94 G4double ComputeDEDXPerVolume(const G4Material*,
95 const G4ParticleDefinition*,
96 G4double kineticEnergy,
97 G4double cutEnergy) override;
98
99 G4double GetChargeSquareRatio(const G4ParticleDefinition* p,
100 const G4Material* mat,
101 G4double kineticEnergy) override;
102
103 G4double GetParticleCharge(const G4ParticleDefinition* p,
104 const G4Material* mat,
105 G4double kineticEnergy) override;
106
107 void CorrectionsAlongStep(const G4MaterialCutsCouple* couple,
108 const G4DynamicParticle* dp,
109 const G4double& length,
110 G4double& eloss) override;
111
112 void SampleSecondaries(std::vector<G4DynamicParticle*>*,
113 const G4MaterialCutsCouple*,
114 const G4DynamicParticle*,
115 G4double tmin,
116 G4double maxEnergy) override;
117
118 // hide assignment operator
119 G4BetheBlochModel & operator=(const G4BetheBlochModel &right) = delete;
120 G4BetheBlochModel(const G4BetheBlochModel&) = delete;
121
122 protected:
123
124 G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
125 G4double kinEnergy) override;
126
127 inline G4double GetChargeSquareRatio() const;
128
129 inline void SetChargeSquareRatio(G4double val);
130
131 private:
132
133 void SetupParameters(const G4ParticleDefinition* p);
134
135 const G4ParticleDefinition* particle = nullptr;
136 const G4ParticleDefinition* theElectron;
137 G4EmCorrections* corr;
138 G4ParticleChangeForLoss* fParticleChange = nullptr;
139 G4NistManager* nist;
140 G4ICRU90StoppingData* fICRU90 = nullptr;
141 const G4Material* currentMaterial = nullptr;
142 const G4Material* baseMaterial = nullptr;
143
144 G4double mass = 0.0;
145 G4double tlimit = DBL_MAX;
146 G4double spin = 0.0;
147 G4double magMoment2 = 0.0;
148 G4double chargeSquare = 1.0;
149 G4double ratio = 1.0;
150 G4double formfact = 0.0;
151 G4double twoln10;
152 G4double fAlphaTlimit;
153 G4double fProtonTlimit;
154
155 G4int iICRU90 = -1;
156 G4bool isIon = false;
157 G4bool isAlpha = false;
158 };
159
160 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
161
162 inline G4double G4BetheBlochModel::GetChargeSquareRatio() const
163 {
164 return chargeSquare;
165 }
166
167 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
168
169 inline void G4BetheBlochModel::SetChargeSquareRatio(G4double val)
170 {
171 chargeSquare = val;
172 }
173
174 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
175
176 #endif
177