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27 // 27 //
28 // ------------ G4AnnihiToMuPair physi 28 // ------------ G4AnnihiToMuPair physics process ------
29 // by H.Burkhardt, S. Kelner and R. Ko 29 // by H.Burkhardt, S. Kelner and R. Kokoulin, November 2002
30 // ------------------------------------------- 30 // -----------------------------------------------------------------------------
31 31
32 // class description 32 // class description
33 // 33 //
34 // (high energy) e+ (atomic) e- ---> mu+ mu- 34 // (high energy) e+ (atomic) e- ---> mu+ mu-
35 // inherit from G4VDiscreteProcess 35 // inherit from G4VDiscreteProcess
36 // 36 //
37 //....oooOO0OOooo........oooOO0OOooo........oo 37 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......//
38 // 38 //
39 // 04.02.03 : cosmetic simplifications (mma) 39 // 04.02.03 : cosmetic simplifications (mma)
40 // 27.01.03 : first implementation (hbu) 40 // 27.01.03 : first implementation (hbu)
41 // 41 //
42 //....oooOO0OOooo........oooOO0OOooo........oo 42 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
43 43
44 #ifndef G4AnnihiToMuPair_h 44 #ifndef G4AnnihiToMuPair_h
45 #define G4AnnihiToMuPair_h 1 45 #define G4AnnihiToMuPair_h 1
46 46
47 #include "G4VDiscreteProcess.hh" 47 #include "G4VDiscreteProcess.hh"
48 #include "globals.hh" 48 #include "globals.hh"
49 49
50 class G4LossTableManager; 50 class G4LossTableManager;
51 class G4ParticleDefinition; 51 class G4ParticleDefinition;
52 class G4Track; 52 class G4Track;
53 class G4Step; 53 class G4Step;
54 54
55 //....oooOO0OOooo........oooOO0OOooo........oo 55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
56 56
57 class G4AnnihiToMuPair : public G4VDiscretePro 57 class G4AnnihiToMuPair : public G4VDiscreteProcess
58 { 58 {
59 public: // with description 59 public: // with description
60 60
61 explicit G4AnnihiToMuPair(const G4String& pr 61 explicit G4AnnihiToMuPair(const G4String& processName ="AnnihiToMuPair",
62 G4ProcessType type = fElectromagneti 62 G4ProcessType type = fElectromagnetic);
63 63
64 ~G4AnnihiToMuPair() override; 64 ~G4AnnihiToMuPair() override;
65 65
66 G4bool IsApplicable(const G4ParticleDefiniti 66 G4bool IsApplicable(const G4ParticleDefinition&) override;
67 // true for positron only. 67 // true for positron only.
68 68
69 void BuildPhysicsTable(const G4ParticleDefin 69 void BuildPhysicsTable(const G4ParticleDefinition&) override;
70 // here dummy, just calling PrintInfoDefinit 70 // here dummy, just calling PrintInfoDefinition
71 // the total cross section is calculated ana 71 // the total cross section is calculated analytically
72 72
73 void PrintInfoDefinition(); 73 void PrintInfoDefinition();
74 // Print few lines of informations about the 74 // Print few lines of informations about the process: validity range,
75 // origine ..etc.. 75 // origine ..etc..
76 // Invoked by BuildPhysicsTable(). 76 // Invoked by BuildPhysicsTable().
77 77
78 void SetCrossSecFactor(G4double fac); 78 void SetCrossSecFactor(G4double fac);
79 // Set the factor to artificially increase t 79 // Set the factor to artificially increase the crossSection (default 1)
80 80
81 G4double GetCrossSecFactor() {return fCrossS 81 G4double GetCrossSecFactor() {return fCrossSecFactor;};
82 // Get the factor to artificially increase t 82 // Get the factor to artificially increase the cross section
83 83
84 G4double CrossSectionPerVolume(G4double posi 84 G4double CrossSectionPerVolume(G4double positronEnergy, const G4Material*);
85 85
86 G4double ComputeCrossSectionPerElectron(cons 86 G4double ComputeCrossSectionPerElectron(const G4double energy);
87 87
88 G4double ComputeCrossSectionPerAtom(const G4 88 G4double ComputeCrossSectionPerAtom(const G4double energy, const G4double Z);
89 89
90 G4double GetMeanFreePath(const G4Track& aTra 90 G4double GetMeanFreePath(const G4Track& aTrack,
91 G4double previousStepSize, 91 G4double previousStepSize,
92 G4ForceCondition* ) override; 92 G4ForceCondition* ) override;
93 // It returns the MeanFreePath of the proces 93 // It returns the MeanFreePath of the process for the current track :
94 // (energy, material) 94 // (energy, material)
95 // The previousStepSize and G4ForceCondition 95 // The previousStepSize and G4ForceCondition* are not used.
96 // This function overloads a virtual functio 96 // This function overloads a virtual function of the base class.
97 // It is invoked by the ProcessManager of th 97 // It is invoked by the ProcessManager of the Particle.
98 98
99 G4VParticleChange* PostStepDoIt(const G4Trac 99 G4VParticleChange* PostStepDoIt(const G4Track& aTrack,
100 const G4Step& aStep) override; 100 const G4Step& aStep) override;
101 // It computes the final state of the proces 101 // It computes the final state of the process (at end of step),
102 // returned as a ParticleChange object. 102 // returned as a ParticleChange object.
103 // This function overloads a virtual functio 103 // This function overloads a virtual function of the base class.
104 // It is invoked by the ProcessManager of th 104 // It is invoked by the ProcessManager of the Particle.
105 105
106 // hide assignment operator as private 106 // hide assignment operator as private
107 G4AnnihiToMuPair& operator=(const G4AnnihiTo 107 G4AnnihiToMuPair& operator=(const G4AnnihiToMuPair &right) = delete;
108 G4AnnihiToMuPair(const G4AnnihiToMuPair& ) = 108 G4AnnihiToMuPair(const G4AnnihiToMuPair& ) = delete;
109 109
110 private: 110 private:
111 111
112 G4LossTableManager* fManager; 112 G4LossTableManager* fManager;
113 const G4ParticleDefinition* part1; 113 const G4ParticleDefinition* part1;
114 const G4ParticleDefinition* part2; 114 const G4ParticleDefinition* part2;
115 G4double fMass; 115 G4double fMass;
116 116
117 G4double fLowEnergyLimit; // Energy thresho 117 G4double fLowEnergyLimit; // Energy threshold of e+
118 G4double fHighEnergyLimit; // Limit of valid 118 G4double fHighEnergyLimit; // Limit of validity of the model
119 G4double fCurrentSigma; // the last value 119 G4double fCurrentSigma; // the last value of cross section per volume
120 G4double fCrossSecFactor; // factor to incr 120 G4double fCrossSecFactor; // factor to increase the cross section
121 G4String fInfo = "e+e->mu+mu-"; 121 G4String fInfo = "e+e->mu+mu-";
122 }; 122 };
123 123
124 //....oooOO0OOooo........oooOO0OOooo........oo 124 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
125 125
126 #endif 126 #endif
127 127
128 128