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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:
>> 36 //
39 // 37 //
40 // 26-12-02 Secondary production moved to deri << 38 // Class Description:
41 // 24-01-03 Make models region aware (V.Ivanch <<
42 // 05-02-03 Fix compilation warnings (V.Ivanch <<
43 // 13-02-03 SubCutoff regime is assigned to a <<
44 // 15-02-03 Add control on delta pointer (V.Iv <<
45 // 23-05-03 Add fluctuation model as a member <<
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 // <<
59 // Class Description: <<
60 // <<
61 // This class manages the ionisation process f <<
62 // nuclear stopping power, energy loss correct <<
63 // It inherites from G4VEnergyLossLoss. <<
64 // 39 //
>> 40 // This class manages the ionisation process for ions.
>> 41 // it inherites from G4VContinuousDiscreteProcess via G4VEnergyLoss.
>> 42 //
65 43
66 // ------------------------------------------- 44 // -------------------------------------------------------------------
67 // 45 //
68 46
69 #ifndef G4ionIonisation_h 47 #ifndef G4ionIonisation_h
70 #define G4ionIonisation_h 1 48 #define G4ionIonisation_h 1
71 49
72 #include "G4VEnergyLossProcess.hh" << 50 #include "G4VEnergyLossSTD.hh"
73 51
>> 52 class G4ParticleDefinition;
>> 53 class G4Track;
>> 54 class G4Step;
74 class G4Material; 55 class G4Material;
>> 56 class G4VEffectiveChargeModel;
75 57
76 class G4ionIonisation : public G4VEnergyLossPr << 58 class G4ionIonisation : public G4VEnergyLossSTD
77 { 59 {
78 public: <<
79 <<
80 explicit G4ionIonisation(const G4String& nam <<
81 60
82 ~G4ionIonisation() override = default; << 61 public:
83 <<
84 G4bool IsApplicable(const G4ParticleDefiniti <<
85 62
86 void AddStoppingData(G4int Z, G4int A, const << 63 G4ionIonisation(const G4String& name = "ionIoni");
87 G4PhysicsVector* dVector); <<
88 64
89 void ActivateStoppingData(G4bool); << 65 ~G4ionIonisation();
>> 66
>> 67 G4bool IsApplicable(const G4ParticleDefinition& p)
>> 68 {return (p.GetPDGCharge() != 0.0 && p.GetPDGMass() > 10.0*MeV);};
90 69
91 // print documentation in html format << 70 virtual G4double MinPrimaryEnergy(const G4ParticleDefinition* p,
92 void ProcessDescription(std::ostream&) const << 71 const G4Material*, G4double cut);
93 72
94 // hide assignment operator << 73 void PrintInfoDefinition() const;
95 G4ionIonisation & operator=(const G4ionIonis << 74 // Print out of the class parameters
96 G4ionIonisation(const G4ionIonisation&) = de <<
97 75
98 protected: 76 protected:
99 77
100 void InitialiseEnergyLossProcess(const G4Par << 78 const G4ParticleDefinition* DefineBaseParticle(const G4ParticleDefinition* p);
101 const G4ParticleDefinition*) overri <<
102 79
103 G4double MinPrimaryEnergy(const G4ParticleDe << 80 virtual G4double GetMeanFreePath(const G4Track& track,
104 const G4Material*, G4double cut) fin << 81 G4double previousStepSize,
>> 82 G4ForceCondition* condition);
105 83
106 inline G4double BetheBlochEnergyThreshold(); << 84 virtual G4double MaxSecondaryEnergy(const G4DynamicParticle* dynParticle);
107 85
108 private: 86 private:
109 87
>> 88 void InitialiseProcess();
110 89
111 const G4ParticleDefinition* theParticle = nu << 90 // hide assignment operator
112 G4double eth; << 91 G4ionIonisation & operator=(const G4ionIonisation &right);
>> 92 G4ionIonisation(const G4ionIonisation&);
>> 93
>> 94 const G4ParticleDefinition* theParticle;
>> 95 const G4ParticleDefinition* theBaseParticle;
113 96
114 G4bool isInitialised = false; <<
115 }; 97 };
116 98
117 //....oooOO0OOooo........oooOO0OOooo........oo 99 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
>> 100 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
>> 101
>> 102 inline G4double G4ionIonisation::MinPrimaryEnergy(
>> 103 const G4ParticleDefinition* p, const G4Material*, G4double cut)
>> 104 {
>> 105 G4double mass = p->GetPDGMass();
>> 106 G4double x = 0.5*cut/electron_mass_c2;
>> 107 // G4double y = electron_mass_c2/mass;
>> 108 // G4double g = x*y + sqrt((1. + x)*(1. + x*y*y));
>> 109 G4double g = sqrt(1. + x);
>> 110 return mass*(g - 1.0);
>> 111 }
>> 112
>> 113 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
>> 114
>> 115 inline G4double G4ionIonisation::MaxSecondaryEnergy(const G4DynamicParticle* dynParticle)
>> 116 {
>> 117 G4double mass = dynParticle->GetMass();
>> 118 G4double gamma = dynParticle->GetKineticEnergy()/mass + 1.0;
>> 119 G4double ratio = electron_mass_c2/mass;
>> 120 G4double tmax = 2.0*electron_mass_c2*(gamma*gamma - 1.) /
>> 121 (1. + 2.0*gamma*ratio + ratio*ratio);
>> 122 return tmax;
>> 123 }
>> 124
>> 125 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
118 126
119 inline G4double G4ionIonisation::BetheBlochEne << 127
>> 128 inline G4double G4ionIonisation::GetMeanFreePath(const G4Track& track,
>> 129 G4double step,
>> 130 G4ForceCondition* cond)
120 { 131 {
121 return eth; << 132 const G4DynamicParticle* dp = track.GetDynamicParticle();
>> 133 G4double mRatio = proton_mass_c2/dp->GetMass();
>> 134 G4double q = dp->GetCharge()/eplus;
>> 135 G4double q_2 = q*q;
>> 136 SetMassRatio(mRatio);
>> 137 SetReduceFactor(1.0/(q_2*mRatio));
>> 138 SetChargeSquare(q_2);
>> 139 SetChargeSquareRatio(q_2);
>> 140
>> 141 return G4VEnergyLossSTD::GetMeanFreePath(track, step, cond);
122 } 142 }
123 143
124 //....oooOO0OOooo........oooOO0OOooo........oo 144 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
125 145
126 #endif 146 #endif
127 147