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Please see the license in the file LICENSE and URL above * 16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. * 17 // * 17 // * * 18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and * 19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. * 20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or * 21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its * 22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your * 23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. * 24 // ******************************************* 24 // ******************************************************************** 25 // 25 // 26 // 26 // >> 27 // $Id: G4AnnihiToMuPair.hh 97391 2016-06-02 10:08:45Z gcosmo $ 27 // 28 // 28 // ------------ G4AnnihiToMuPair physi 29 // ------------ G4AnnihiToMuPair physics process ------ 29 // by H.Burkhardt, S. Kelner and R. Ko 30 // by H.Burkhardt, S. Kelner and R. Kokoulin, November 2002 30 // ------------------------------------------- 31 // ----------------------------------------------------------------------------- 31 32 32 // class description 33 // class description 33 // 34 // 34 // (high energy) e+ (atomic) e- ---> mu+ mu- 35 // (high energy) e+ (atomic) e- ---> mu+ mu- 35 // inherit from G4VDiscreteProcess 36 // inherit from G4VDiscreteProcess 36 // 37 // 37 //....oooOO0OOooo........oooOO0OOooo........oo 38 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......// 38 // 39 // 39 // 04.02.03 : cosmetic simplifications (mma) 40 // 04.02.03 : cosmetic simplifications (mma) 40 // 27.01.03 : first implementation (hbu) 41 // 27.01.03 : first implementation (hbu) 41 // 42 // 42 //....oooOO0OOooo........oooOO0OOooo........oo 43 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 43 44 44 #ifndef G4AnnihiToMuPair_h 45 #ifndef G4AnnihiToMuPair_h 45 #define G4AnnihiToMuPair_h 1 46 #define G4AnnihiToMuPair_h 1 46 47 47 #include "G4VDiscreteProcess.hh" 48 #include "G4VDiscreteProcess.hh" 48 #include "globals.hh" 49 #include "globals.hh" 49 50 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(); 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 CrossSecFactor;}; 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, >> 85 const G4Material*); >> 86 // Compute total cross section 85 87 86 G4double ComputeCrossSectionPerElectron(cons << 88 G4double ComputeCrossSectionPerAtom(G4double PositronEnergy, >> 89 G4double AtomicZ); >> 90 // Compute total cross section 87 91 88 G4double ComputeCrossSectionPerAtom(const G4 << 92 G4double GetMeanFreePath(const G4Track& aTrack, >> 93 G4double previousStepSize, >> 94 G4ForceCondition* ) override; >> 95 // It returns the MeanFreePath of the process for the current track : >> 96 // (energy, material) >> 97 // The previousStepSize and G4ForceCondition* are not used. >> 98 // This function overloads a virtual function of the base class. >> 99 // It is invoked by the ProcessManager of the Particle. 89 100 90 G4double GetMeanFreePath(const G4Track& aTra << 101 G4VParticleChange* PostStepDoIt(const G4Track& aTrack, 91 G4double previousStepSize, << 102 const G4Step& aStep) override; 92 G4ForceCondition* ) override; << 103 // It computes the final state of the process (at end of step), 93 // It returns the MeanFreePath of the proces << 104 // returned as a ParticleChange object. 94 // (energy, material) << 105 // This function overloads a virtual function of the base class. 95 // The previousStepSize and G4ForceCondition << 106 // 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 << 98 107 99 G4VParticleChange* PostStepDoIt(const G4Trac << 108 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 << 105 109 106 // hide assignment operator as private << 110 // hide assignment operator as private 107 G4AnnihiToMuPair& operator=(const G4AnnihiTo << 111 G4AnnihiToMuPair& operator=(const G4AnnihiToMuPair &right) = delete; 108 G4AnnihiToMuPair(const G4AnnihiToMuPair& ) = << 112 G4AnnihiToMuPair(const G4AnnihiToMuPair& ) = delete; 109 113 110 private: << 114 G4double LowestEnergyLimit; // Energy threshold of e+ >> 115 G4double HighestEnergyLimit; // Limit of validity of the model 111 116 112 G4LossTableManager* fManager; << 117 G4double CurrentSigma; // the last value of cross section per volume 113 const G4ParticleDefinition* part1; << 114 const G4ParticleDefinition* part2; << 115 G4double fMass; << 116 118 117 G4double fLowEnergyLimit; // Energy thresho << 119 G4double CrossSecFactor; // factor to artificially increase 118 G4double fHighEnergyLimit; // Limit of valid << 120 // the cross section, static to make sure 119 G4double fCurrentSigma; // the last value << 121 // to have single value 120 G4double fCrossSecFactor; // factor to incr << 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