Geant4 Cross Reference |
1 // 1 2 // ******************************************* 3 // * License and Disclaimer 4 // * 5 // * The Geant4 software is copyright of th 6 // * the Geant4 Collaboration. It is provided 7 // * conditions of the Geant4 Software License 8 // * LICENSE and available at http://cern.ch/ 9 // * include a list of copyright holders. 10 // * 11 // * Neither the authors of this software syst 12 // * institutes,nor the agencies providing fin 13 // * work make any representation or warran 14 // * regarding this software system or assum 15 // * use. Please see the license in the file 16 // * for the full disclaimer and the limitatio 17 // * 18 // * This code implementation is the result 19 // * technical work of the GEANT4 collaboratio 20 // * By using, copying, modifying or distri 21 // * any work based on the software) you ag 22 // * use in resulting scientific publicati 23 // * acceptance of all terms of the Geant4 Sof 24 // ******************************************* 25 // 26 // 27 // 28 // ------------ G4AnnihiToMuPair physi 29 // by H.Burkhardt, S. Kelner and R. Ko 30 // ------------------------------------------- 31 32 // class description 33 // 34 // (high energy) e+ (atomic) e- ---> mu+ mu- 35 // inherit from G4VDiscreteProcess 36 // 37 //....oooOO0OOooo........oooOO0OOooo........oo 38 // 39 // 04.02.03 : cosmetic simplifications (mma) 40 // 27.01.03 : first implementation (hbu) 41 // 42 //....oooOO0OOooo........oooOO0OOooo........oo 43 44 #ifndef G4AnnihiToMuPair_h 45 #define G4AnnihiToMuPair_h 1 46 47 #include "G4VDiscreteProcess.hh" 48 #include "globals.hh" 49 50 class G4LossTableManager; 51 class G4ParticleDefinition; 52 class G4Track; 53 class G4Step; 54 55 //....oooOO0OOooo........oooOO0OOooo........oo 56 57 class G4AnnihiToMuPair : public G4VDiscretePro 58 { 59 public: // with description 60 61 explicit G4AnnihiToMuPair(const G4String& pr 62 G4ProcessType type = fElectromagneti 63 64 ~G4AnnihiToMuPair() override; 65 66 G4bool IsApplicable(const G4ParticleDefiniti 67 // true for positron only. 68 69 void BuildPhysicsTable(const G4ParticleDefin 70 // here dummy, just calling PrintInfoDefinit 71 // the total cross section is calculated ana 72 73 void PrintInfoDefinition(); 74 // Print few lines of informations about the 75 // origine ..etc.. 76 // Invoked by BuildPhysicsTable(). 77 78 void SetCrossSecFactor(G4double fac); 79 // Set the factor to artificially increase t 80 81 G4double GetCrossSecFactor() {return fCrossS 82 // Get the factor to artificially increase t 83 84 G4double CrossSectionPerVolume(G4double posi 85 86 G4double ComputeCrossSectionPerElectron(cons 87 88 G4double ComputeCrossSectionPerAtom(const G4 89 90 G4double GetMeanFreePath(const G4Track& aTra 91 G4double previousStepSize, 92 G4ForceCondition* ) override; 93 // It returns the MeanFreePath of the proces 94 // (energy, material) 95 // The previousStepSize and G4ForceCondition 96 // This function overloads a virtual functio 97 // It is invoked by the ProcessManager of th 98 99 G4VParticleChange* PostStepDoIt(const G4Trac 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 105 106 // hide assignment operator as private 107 G4AnnihiToMuPair& operator=(const G4AnnihiTo 108 G4AnnihiToMuPair(const G4AnnihiToMuPair& ) = 109 110 private: 111 112 G4LossTableManager* fManager; 113 const G4ParticleDefinition* part1; 114 const G4ParticleDefinition* part2; 115 G4double fMass; 116 117 G4double fLowEnergyLimit; // Energy thresho 118 G4double fHighEnergyLimit; // Limit of valid 119 G4double fCurrentSigma; // the last value 120 G4double fCrossSecFactor; // factor to incr 121 G4String fInfo = "e+e->mu+mu-"; 122 }; 123 124 //....oooOO0OOooo........oooOO0OOooo........oo 125 126 #endif 127 128