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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; <<
51 class G4ParticleDefinition; 50 class G4ParticleDefinition;
52 class G4Track; 51 class G4Track;
53 class G4Step; 52 class G4Step;
54 53
55 //....oooOO0OOooo........oooOO0OOooo........oo 54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
56 55
57 class G4AnnihiToMuPair : public G4VDiscretePro 56 class G4AnnihiToMuPair : public G4VDiscreteProcess
58 { 57 {
59 public: // with description << 58 public: // with description
60 59
61 explicit G4AnnihiToMuPair(const G4String& pr << 60 explicit G4AnnihiToMuPair(const G4String& processName ="AnnihiToMuPair",
62 G4ProcessType type = fElectromagneti << 61 G4ProcessType type = fElectromagnetic);
63 62
64 ~G4AnnihiToMuPair() override; << 63 ~G4AnnihiToMuPair();
65 64
66 G4bool IsApplicable(const G4ParticleDefiniti << 65 G4bool IsApplicable(const G4ParticleDefinition&) override;
67 // true for positron only. << 66 // true for positron only.
68 67
69 void BuildPhysicsTable(const G4ParticleDefin << 68 void BuildPhysicsTable(const G4ParticleDefinition&) override;
70 // here dummy, just calling PrintInfoDefinit << 69 // here dummy, just calling PrintInfoDefinition
71 // the total cross section is calculated ana << 70 // the total cross section is calculated analytically
72 71
73 void PrintInfoDefinition(); << 72 void PrintInfoDefinition();
74 // Print few lines of informations about the << 73 // Print few lines of informations about the process: validity range,
75 // origine ..etc.. << 74 // origine ..etc..
76 // Invoked by BuildPhysicsTable(). << 75 // Invoked by BuildPhysicsTable().
77 76
78 void SetCrossSecFactor(G4double fac); << 77 void SetCrossSecFactor(G4double fac);
79 // Set the factor to artificially increase t << 78 // Set the factor to artificially increase the crossSection (default 1)
80 79
81 G4double GetCrossSecFactor() {return fCrossS << 80 G4double GetCrossSecFactor() {return CrossSecFactor;};
82 // Get the factor to artificially increase t << 81 // Get the factor to artificially increase the cross section
83 82
84 G4double CrossSectionPerVolume(G4double posi << 83 G4double CrossSectionPerVolume(G4double PositronEnergy,
>> 84 const G4Material*);
>> 85 // Compute total cross section
85 86
86 G4double ComputeCrossSectionPerElectron(cons << 87 G4double ComputeCrossSectionPerAtom(G4double PositronEnergy,
>> 88 G4double AtomicZ);
>> 89 // Compute total cross section
87 90
88 G4double ComputeCrossSectionPerAtom(const G4 << 91 G4double GetMeanFreePath(const G4Track& aTrack,
>> 92 G4double previousStepSize,
>> 93 G4ForceCondition* ) override;
>> 94 // It returns the MeanFreePath of the process for the current track :
>> 95 // (energy, material)
>> 96 // The previousStepSize and G4ForceCondition* are not used.
>> 97 // This function overloads a virtual function of the base class.
>> 98 // It is invoked by the ProcessManager of the Particle.
89 99
90 G4double GetMeanFreePath(const G4Track& aTra << 100 G4VParticleChange* PostStepDoIt(const G4Track& aTrack,
91 G4double previousStepSize, << 101 const G4Step& aStep) override;
92 G4ForceCondition* ) override; << 102 // It computes the final state of the process (at end of step),
93 // It returns the MeanFreePath of the proces << 103 // returned as a ParticleChange object.
94 // (energy, material) << 104 // This function overloads a virtual function of the base class.
95 // The previousStepSize and G4ForceCondition << 105 // It is invoked by the ProcessManager of the Particle.
96 // This function overloads a virtual functio <<
97 // It is invoked by the ProcessManager of th <<
98 106
99 G4VParticleChange* PostStepDoIt(const G4Trac << 107 private:
100 const G4Step& aStep) override; <<
101 // It computes the final state of the proces <<
102 // returned as a ParticleChange object. <<
103 // This function overloads a virtual functio <<
104 // It is invoked by the ProcessManager of th <<
105 108
106 // hide assignment operator as private << 109 // hide assignment operator as private
107 G4AnnihiToMuPair& operator=(const G4AnnihiTo << 110 G4AnnihiToMuPair& operator=(const G4AnnihiToMuPair &right) = delete;
108 G4AnnihiToMuPair(const G4AnnihiToMuPair& ) = << 111 G4AnnihiToMuPair(const G4AnnihiToMuPair& ) = delete;
109 112
110 private: << 113 G4double LowestEnergyLimit; // Energy threshold of e+
>> 114 G4double HighestEnergyLimit; // Limit of validity of the model
111 115
112 G4LossTableManager* fManager; << 116 G4double CurrentSigma; // the last value of cross section per volume
113 const G4ParticleDefinition* part1; <<
114 const G4ParticleDefinition* part2; <<
115 G4double fMass; <<
116 117
117 G4double fLowEnergyLimit; // Energy thresho << 118 G4double CrossSecFactor; // factor to artificially increase
118 G4double fHighEnergyLimit; // Limit of valid << 119 // the cross section, static to make sure
119 G4double fCurrentSigma; // the last value << 120 // to have single value
120 G4double fCrossSecFactor; // factor to incr <<
121 G4String fInfo = "e+e->mu+mu-"; <<
122 }; 121 };
123 122
124 //....oooOO0OOooo........oooOO0OOooo........oo 123 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
125 124
126 #endif 125 #endif
127 126
128 127