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26 // 26 //
27 // ------------ G4GammaConversionToMuo 27 // ------------ G4GammaConversionToMuons physics process ------
28 // by H.Burkhardt, S. Kelner and R. Ko 28 // by H.Burkhardt, S. Kelner and R. Kokoulin, April 2002
29 // ------------------------------------------- 29 // -----------------------------------------------------------------------------
30 // 30 //
31 // 05-08-04: suppression of .icc file (mma) 31 // 05-08-04: suppression of .icc file (mma)
32 // 13-08-04, public ComputeCrossSectionPerAtom 32 // 13-08-04, public ComputeCrossSectionPerAtom() and ComputeMeanFreePath() (mma)
33 // 33 //
34 // class description 34 // class description
35 // 35 //
36 // gamma ---> mu+ mu- 36 // gamma ---> mu+ mu-
37 // inherit from G4VDiscreteProcess 37 // inherit from G4VDiscreteProcess
38 // 38 //
39 39
40 //....oooOO0OOooo........oooOO0OOooo........oo 40 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
41 41
42 #ifndef G4GammaConversionToMuons_h 42 #ifndef G4GammaConversionToMuons_h
43 #define G4GammaConversionToMuons_h 1 43 #define G4GammaConversionToMuons_h 1
44 44
45 #include "G4ios.hh" 45 #include "G4ios.hh"
46 #include "globals.hh" 46 #include "globals.hh"
47 #include "Randomize.hh" 47 #include "Randomize.hh"
48 #include "G4VDiscreteProcess.hh" 48 #include "G4VDiscreteProcess.hh"
49 #include "G4PhysicsTable.hh" 49 #include "G4PhysicsTable.hh"
50 #include "G4PhysicsLogVector.hh" 50 #include "G4PhysicsLogVector.hh"
51 #include "G4ParticleDefinition.hh" 51 #include "G4ParticleDefinition.hh"
52 #include "G4Element.hh" 52 #include "G4Element.hh"
53 #include "G4Step.hh" 53 #include "G4Step.hh"
54 #include <vector> <<
55 54
56 //....oooOO0OOooo........oooOO0OOooo........oo 55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
57 56
58 class G4LossTableManager; 57 class G4LossTableManager;
59 class G4BetheHeitler5DModel; 58 class G4BetheHeitler5DModel;
60 59
61 class G4GammaConversionToMuons : public G4VDis 60 class G4GammaConversionToMuons : public G4VDiscreteProcess
62 { 61 {
63 public: // with description 62 public: // with description
64 63
65 explicit G4GammaConversionToMuons( 64 explicit G4GammaConversionToMuons(
66 const G4String& proces 65 const G4String& processName ="GammaToMuPair",
67 G4ProcessType type = f 66 G4ProcessType type = fElectromagnetic);
68 67
69 ~G4GammaConversionToMuons() override; 68 ~G4GammaConversionToMuons() override;
70 69
71 G4bool IsApplicable(const G4ParticleDefiniti 70 G4bool IsApplicable(const G4ParticleDefinition&) override;
72 // true for Gamma only. 71 // true for Gamma only.
73 72
74 void BuildPhysicsTable(const G4ParticleDefin 73 void BuildPhysicsTable(const G4ParticleDefinition&) override;
75 // here dummy, the total cross section 74 // here dummy, the total cross section parametrization is used rather
76 // than tables, just calling PrintInfo 75 // than tables, just calling PrintInfoDefinition
77 76
78 void PrintInfoDefinition(); 77 void PrintInfoDefinition();
79 // Print few lines of informations abou 78 // Print few lines of informations about the process: validity range,
80 // origine ..etc.. 79 // origine ..etc..
81 // Invoked by BuildThePhysicsTable(). 80 // Invoked by BuildThePhysicsTable().
82 81
83 void SetCrossSecFactor(G4double fac); 82 void SetCrossSecFactor(G4double fac);
84 // Set the factor to artificially incre 83 // Set the factor to artificially increase the crossSection (default 1)
85 84
86 inline G4double GetCrossSecFactor() const { 85 inline G4double GetCrossSecFactor() const { return CrossSecFactor;}
87 // Get the factor to artificially incre 86 // Get the factor to artificially increase the cross section
88 87
89 G4double GetMeanFreePath(const G4Track& aTra 88 G4double GetMeanFreePath(const G4Track& aTrack,
90 G4double previousSt 89 G4double previousStepSize,
91 G4ForceCondition* c 90 G4ForceCondition* condition) override;
92 // It returns the MeanFreePath of the p 91 // It returns the MeanFreePath of the process for the current track :
93 // (energy, material) 92 // (energy, material)
94 // The previousStepSize and G4ForceCond 93 // The previousStepSize and G4ForceCondition* are not used.
95 // This function overloads a virtual fu 94 // This function overloads a virtual function of the base class.
96 // It is invoked by the ProcessManager 95 // It is invoked by the ProcessManager of the Particle.
97 96
98 G4double GetCrossSectionPerAtom(const G4Dyna 97 G4double GetCrossSectionPerAtom(const G4DynamicParticle* aDynamicGamma,
99 const G4Elem 98 const G4Element* anElement);
100 // It returns the total CrossSectionPer 99 // It returns the total CrossSectionPerAtom of the process,
101 // for the current DynamicGamma (energy 100 // for the current DynamicGamma (energy), in anElement.
102 101
103 G4VParticleChange* PostStepDoIt(const G4Trac 102 G4VParticleChange* PostStepDoIt(const G4Track& aTrack,
104 const G4Step& aStep) override; 103 const G4Step& aStep) override;
105 // It computes the final state of the p 104 // It computes the final state of the process (at end of step),
106 // returned as a ParticleChange object. 105 // returned as a ParticleChange object.
107 // This function overloads a virtual fu 106 // This function overloads a virtual function of the base class.
108 // It is invoked by the ProcessManager 107 // It is invoked by the ProcessManager of the Particle.
109 108
110 G4double ComputeCrossSectionPerAtom(G4double 109 G4double ComputeCrossSectionPerAtom(G4double GammaEnergy, G4int Z);
111 110
112 G4double ComputeMeanFreePath (G4double Gamma 111 G4double ComputeMeanFreePath (G4double GammaEnergy,
113 const G4Materi 112 const G4Material* aMaterial);
114 113
115 // hide assignment operator as private 114 // hide assignment operator as private
116 G4GammaConversionToMuons& 115 G4GammaConversionToMuons&
117 operator=(const G4GammaConversionToMuons &ri 116 operator=(const G4GammaConversionToMuons &right) = delete;
118 G4GammaConversionToMuons(const G4GammaConver 117 G4GammaConversionToMuons(const G4GammaConversionToMuons& ) = delete;
119 118
120 private: 119 private:
121 120
122 const G4Element* SelectRandomAtom(const G4Dy 121 const G4Element* SelectRandomAtom(const G4DynamicParticle* aDynamicGamma,
123 const G4Ma 122 const G4Material* aMaterial);
124 123
125 G4double Mmuon; 124 G4double Mmuon;
126 G4double Rc; 125 G4double Rc;
127 G4double LimitEnergy; // energy lim 126 G4double LimitEnergy; // energy limit for accurate x-section
128 G4double LowestEnergyLimit; // low energ 127 G4double LowestEnergyLimit; // low energy limit of the model
129 G4double HighestEnergyLimit; // high energ 128 G4double HighestEnergyLimit; // high energy limit of the model
130 G4double Energy5DLimit = 0.0; // high energ 129 G4double Energy5DLimit = 0.0; // high energy limit for 5D final state sampling
131 130
132 G4double MeanFreePath = DBL_MAX;// actual Me 131 G4double MeanFreePath = DBL_MAX;// actual MeanFreePath (current medium)
133 G4double CrossSecFactor = 1.0; // factor to 132 G4double CrossSecFactor = 1.0; // factor to artificially increase
134 // the cross 133 // the cross section
135 134
136 G4LossTableManager* fManager; 135 G4LossTableManager* fManager;
137 G4BetheHeitler5DModel* f5Dmodel = nullptr; 136 G4BetheHeitler5DModel* f5Dmodel = nullptr;
138 const G4ParticleDefinition* theGamma; 137 const G4ParticleDefinition* theGamma;
139 const G4ParticleDefinition* theMuonPlus; 138 const G4ParticleDefinition* theMuonPlus;
140 const G4ParticleDefinition* theMuonMinus; 139 const G4ParticleDefinition* theMuonMinus;
141 std::vector<G4double> temp; <<
142 }; 140 };
143 141
144 //....oooOO0OOooo........oooOO0OOooo........oo 142 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
145 143
146 #endif 144 #endif
147 145
148 146