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25 // 22 //
26 // 23 //
27 // ------------------------------------------- 24 // -------------------------------------------------------------------
28 // 25 //
29 // GEANT4 Class header file 26 // GEANT4 Class header file
30 // 27 //
31 // 28 //
32 // File name: G4ionIonisation 29 // File name: G4ionIonisation
33 // 30 //
34 // Author: Vladimir Ivanchenko 31 // Author: Vladimir Ivanchenko
35 // 32 //
36 // Creation date: 07.05.2002 33 // Creation date: 07.05.2002
37 // 34 //
38 // Modifications: 35 // Modifications:
39 // 36 //
40 // 26-12-02 Secondary production moved to deri 37 // 26-12-02 Secondary production moved to derived classes (VI)
41 // 24-01-03 Make models region aware (V.Ivanch 38 // 24-01-03 Make models region aware (V.Ivanchenko)
42 // 05-02-03 Fix compilation warnings (V.Ivanch 39 // 05-02-03 Fix compilation warnings (V.Ivanchenko)
43 // 13-02-03 SubCutoff regime is assigned to a 40 // 13-02-03 SubCutoff regime is assigned to a region (V.Ivanchenko)
44 // 15-02-03 Add control on delta pointer (V.Iv 41 // 15-02-03 Add control on delta pointer (V.Ivanchenko)
45 // 23-05-03 Add fluctuation model as a member 42 // 23-05-03 Add fluctuation model as a member function (V.Ivanchenko)
46 // 03-08-03 Add effective charge and saturatio <<
47 // 12-11-03 Fix problem of negative effective <<
48 // 12-11-03 G4EnergyLossSTD -> G4EnergyLossPro <<
49 // 21-01-04 Migrade to G4ParticleChangeForLoss <<
50 // 08-11-04 Migration to new interface of Stor <<
51 // 08-04-05 Major optimisation of internal int <<
52 // 11-04-05 Move MaxSecondary energy to model <<
53 // 11-04-04 Move MaxSecondaryEnergy to models <<
54 // 10-05-06 Add a possibility to download user <<
55 // 22-07-06 Remove obsolete method (V.Ivantche <<
56 // 07-11-07 Moved CorrectionsAlongStep to cc ( <<
57 // 12-09-08 Removed InitialiseMassCharge and C <<
58 // 43 //
59 // Class Description: 44 // Class Description:
60 // 45 //
61 // This class manages the ionisation process f << 46 // This class manages the ionisation process for ions.
62 // nuclear stopping power, energy loss correct << 47 // it inherites from G4VContinuousDiscreteProcess via G4VEnergyLoss.
63 // It inherites from G4VEnergyLossLoss. <<
64 // 48 //
65 49
66 // ------------------------------------------- 50 // -------------------------------------------------------------------
67 // 51 //
68 52
69 #ifndef G4ionIonisation_h 53 #ifndef G4ionIonisation_h
70 #define G4ionIonisation_h 1 54 #define G4ionIonisation_h 1
71 55
72 #include "G4VEnergyLossProcess.hh" << 56 #include "G4VEnergyLossSTD.hh"
73 57
74 class G4Material; 58 class G4Material;
>> 59 class G4VEmFluctuationModel;
75 60
76 class G4ionIonisation : public G4VEnergyLossPr << 61 class G4ionIonisation : public G4VEnergyLossSTD
77 { 62 {
>> 63
78 public: 64 public:
79 65
80 explicit G4ionIonisation(const G4String& nam << 66 G4ionIonisation(const G4String& name = "ionIoni");
81 67
82 ~G4ionIonisation() override = default; << 68 ~G4ionIonisation();
83 69
84 G4bool IsApplicable(const G4ParticleDefiniti << 70 G4bool IsApplicable(const G4ParticleDefinition& p);
85 71
86 void AddStoppingData(G4int Z, G4int A, const << 72 virtual G4double MinPrimaryEnergy(const G4ParticleDefinition* p,
87 G4PhysicsVector* dVector); << 73 const G4Material*, G4double cut);
88 74
89 void ActivateStoppingData(G4bool); << 75 virtual std::vector<G4Track*>* SecondariesAlongStep(
>> 76 const G4Step&,
>> 77 G4double&,
>> 78 G4double&,
>> 79 G4double&);
90 80
91 // print documentation in html format << 81 virtual void SecondariesPostStep(
92 void ProcessDescription(std::ostream&) const << 82 G4VEmModel*,
>> 83 const G4MaterialCutsCouple*,
>> 84 const G4DynamicParticle*,
>> 85 G4double&,
>> 86 G4double&);
93 87
94 // hide assignment operator << 88 void SetSubCutoff(G4bool val);
95 G4ionIonisation & operator=(const G4ionIonis << 89
96 G4ionIonisation(const G4ionIonisation&) = de << 90 void PrintInfoDefinition();
>> 91 // Print out of the class parameters
97 92
98 protected: 93 protected:
99 94
100 void InitialiseEnergyLossProcess(const G4Par << 95 const G4ParticleDefinition* DefineBaseParticle(const G4ParticleDefinition* p);
101 const G4ParticleDefinition*) overri <<
102 96
103 G4double MinPrimaryEnergy(const G4ParticleDe << 97 virtual G4double GetMeanFreePath(const G4Track& track,
104 const G4Material*, G4double cut) fin << 98 G4double previousStepSize,
>> 99 G4ForceCondition* condition);
105 100
106 inline G4double BetheBlochEnergyThreshold(); << 101 virtual G4double MaxSecondaryEnergy(const G4DynamicParticle* dynParticle);
107 102
108 private: 103 private:
109 104
>> 105 void InitialiseProcess();
110 106
111 const G4ParticleDefinition* theParticle = nu << 107 // hide assignment operator
112 G4double eth; << 108 G4ionIonisation & operator=(const G4ionIonisation &right);
>> 109 G4ionIonisation(const G4ionIonisation&);
113 110
114 G4bool isInitialised = false; << 111 const G4ParticleDefinition* theParticle;
>> 112 const G4ParticleDefinition* theBaseParticle;
>> 113 G4VEmFluctuationModel* flucModel;
>> 114 G4bool subCutoff;
115 }; 115 };
116 116
117 //....oooOO0OOooo........oooOO0OOooo........oo 117 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
>> 118 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
>> 119
>> 120 inline G4bool G4ionIonisation::IsApplicable(const G4ParticleDefinition& p)
>> 121 {
>> 122 return (p.GetPDGCharge() != 0.0 && p.GetParticleType() == "nucleus");
>> 123 }
>> 124
>> 125 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
>> 126
>> 127 inline G4double G4ionIonisation::MinPrimaryEnergy(
>> 128 const G4ParticleDefinition* p, const G4Material*, G4double cut)
>> 129 {
>> 130 G4double mass = p->GetPDGMass();
>> 131 G4double x = 0.5*cut/electron_mass_c2;
>> 132 // G4double y = electron_mass_c2/mass;
>> 133 // G4double g = x*y + sqrt((1. + x)*(1. + x*y*y));
>> 134 G4double g = sqrt(1. + x);
>> 135 return mass*(g - 1.0);
>> 136 }
>> 137
>> 138 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
>> 139
>> 140 inline G4double G4ionIonisation::MaxSecondaryEnergy(const G4DynamicParticle* dynParticle)
>> 141 {
>> 142 G4double mass = dynParticle->GetMass();
>> 143 G4double gamma = dynParticle->GetKineticEnergy()/mass + 1.0;
>> 144 G4double ratio = electron_mass_c2/mass;
>> 145 G4double tmax = 2.0*electron_mass_c2*(gamma*gamma - 1.) /
>> 146 (1. + 2.0*gamma*ratio + ratio*ratio);
>> 147 return tmax;
>> 148 }
>> 149
>> 150 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
>> 151
>> 152
>> 153 inline G4double G4ionIonisation::GetMeanFreePath(const G4Track& track,
>> 154 G4double step,
>> 155 G4ForceCondition* cond)
>> 156 {
>> 157 const G4DynamicParticle* dp = track.GetDynamicParticle();
>> 158 G4double mRatio = proton_mass_c2/dp->GetMass();
>> 159 G4double q = dp->GetCharge()/eplus;
>> 160 G4double q_2 = q*q;
>> 161 SetMassRatio(mRatio);
>> 162 SetReduceFactor(1.0/(q_2*mRatio));
>> 163 SetChargeSquare(q_2);
>> 164 SetChargeSquareRatio(q_2);
>> 165
>> 166 return G4VEnergyLossSTD::GetMeanFreePath(track, step, cond);
>> 167 }
>> 168
>> 169 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
>> 170
>> 171 #include "G4VSubCutoffProcessor.hh"
>> 172
>> 173 inline std::vector<G4Track*>* G4ionIonisation::SecondariesAlongStep(
>> 174 const G4Step& step,
>> 175 G4double& tmax,
>> 176 G4double& eloss,
>> 177 G4double& kinEnergy)
>> 178 {
>> 179 std::vector<G4Track*>* newp = 0;
>> 180 if(subCutoff) {
>> 181 G4VSubCutoffProcessor* sp = SubCutoffProcessor(CurrentMaterialCutsCoupleIndex());
>> 182 if (sp) {
>> 183 G4VEmModel* model = SelectModel(kinEnergy);
>> 184 newp = sp->SampleSecondaries(step,tmax,eloss,model);
>> 185 }
>> 186 }
>> 187 return newp;
>> 188 }
>> 189
>> 190 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
>> 191
>> 192 #include "G4VEmModel.hh"
118 193
119 inline G4double G4ionIonisation::BetheBlochEne << 194 inline void G4ionIonisation::SecondariesPostStep(
>> 195 G4VEmModel* model,
>> 196 const G4MaterialCutsCouple* couple,
>> 197 const G4DynamicParticle* dp,
>> 198 G4double& tcut,
>> 199 G4double& kinEnergy)
120 { 200 {
121 return eth; << 201 G4DynamicParticle* delta = model->SampleSecondary(couple, dp, tcut, kinEnergy);
>> 202 if(delta) {
>> 203 aParticleChange.SetNumberOfSecondaries(1);
>> 204 aParticleChange.AddSecondary(delta);
>> 205 G4ThreeVector finalP = dp->GetMomentum();
>> 206 kinEnergy -= delta->GetKineticEnergy();
>> 207 finalP -= delta->GetMomentum();
>> 208 finalP = finalP.unit();
>> 209 aParticleChange.SetMomentumDirectionChange(finalP);
>> 210 }
122 } 211 }
123 212
124 //....oooOO0OOooo........oooOO0OOooo........oo 213 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
125 214
126 #endif 215 #endif
127 216