[819] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // |
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| 27 | // $Id: G4GammaConversionToMuons.hh,v 1.2 2006/06/29 19:32:18 gunter Exp $ |
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[1196] | 28 | // GEANT4 tag $Name: geant4-09-03-cand-01 $ |
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[819] | 29 | // |
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| 30 | // ------------ G4GammaConversionToMuons physics process ------ |
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| 31 | // by H.Burkhardt, S. Kelner and R. Kokoulin, April 2002 |
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| 32 | // ----------------------------------------------------------------------------- |
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| 33 | // |
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| 34 | // 05-08-04: suppression of .icc file (mma) |
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| 35 | // 13-08-04, public ComputeCrossSectionPerAtom() and ComputeMeanFreePath() (mma) |
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| 36 | // |
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| 37 | // class description |
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| 38 | // |
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| 39 | // gamma ---> mu+ mu- |
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| 40 | // inherit from G4VDiscreteProcess |
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| 41 | // |
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| 42 | |
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| 43 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 44 | |
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| 45 | #ifndef G4GammaConversionToMuons_h |
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| 46 | #define G4GammaConversionToMuons_h 1 |
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| 47 | |
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| 48 | #include "G4ios.hh" |
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| 49 | #include "globals.hh" |
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| 50 | #include "Randomize.hh" |
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| 51 | #include "G4VDiscreteProcess.hh" |
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| 52 | #include "G4PhysicsTable.hh" |
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| 53 | #include "G4PhysicsLogVector.hh" |
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| 54 | #include "G4Element.hh" |
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| 55 | #include "G4Gamma.hh" |
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| 56 | #include "G4Electron.hh" |
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| 57 | #include "G4Positron.hh" |
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| 58 | #include "G4Step.hh" |
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| 59 | |
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| 60 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 61 | |
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| 62 | class G4GammaConversionToMuons : public G4VDiscreteProcess |
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| 63 | |
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| 64 | { |
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| 65 | public: // with description |
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| 66 | |
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| 67 | G4GammaConversionToMuons(const G4String& processName ="GammaToMuPair", |
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| 68 | G4ProcessType type = fElectromagnetic); |
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| 69 | |
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| 70 | ~G4GammaConversionToMuons(); |
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| 71 | |
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| 72 | G4bool IsApplicable(const G4ParticleDefinition&); |
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| 73 | // true for Gamma only. |
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| 74 | |
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| 75 | void BuildPhysicsTable(const G4ParticleDefinition&); |
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| 76 | // here dummy, the total cross section parametrization is used rather |
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| 77 | // than tables, just calling PrintInfoDefinition |
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| 78 | |
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| 79 | void PrintInfoDefinition(); |
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| 80 | // Print few lines of informations about the process: validity range, |
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| 81 | // origine ..etc.. |
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| 82 | // Invoked by BuildThePhysicsTable(). |
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| 83 | |
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| 84 | void SetCrossSecFactor(G4double fac); |
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| 85 | // Set the factor to artificially increase the crossSection (default 1) |
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| 86 | |
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| 87 | G4double GetCrossSecFactor() { return CrossSecFactor;} |
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| 88 | // Get the factor to artificially increase the cross section |
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| 89 | |
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| 90 | G4double GetMeanFreePath(const G4Track& aTrack, |
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| 91 | G4double previousStepSize, |
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| 92 | G4ForceCondition* condition); |
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| 93 | // It returns the MeanFreePath of the process for the current track : |
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| 94 | // (energy, material) |
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| 95 | // The previousStepSize and G4ForceCondition* are not used. |
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| 96 | // This function overloads a virtual function of the base class. |
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| 97 | // It is invoked by the ProcessManager of the Particle. |
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| 98 | |
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| 99 | G4double GetCrossSectionPerAtom(const G4DynamicParticle* aDynamicGamma, |
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| 100 | G4Element* anElement); |
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| 101 | // It returns the total CrossSectionPerAtom of the process, |
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| 102 | // for the current DynamicGamma (energy), in anElement. |
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| 103 | |
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| 104 | G4VParticleChange* PostStepDoIt(const G4Track& aTrack, |
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| 105 | const G4Step& aStep); |
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| 106 | // It computes the final state of the process (at end of step), |
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| 107 | // returned as a ParticleChange object. |
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| 108 | // This function overloads a virtual function of the base class. |
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| 109 | // It is invoked by the ProcessManager of the Particle. |
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| 110 | |
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| 111 | virtual |
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| 112 | G4double ComputeCrossSectionPerAtom(G4double GammaEnergy, |
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| 113 | G4double AtomicZ,G4double AtomicA); |
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| 114 | |
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| 115 | G4double ComputeMeanFreePath (G4double GammaEnergy, |
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| 116 | G4Material* aMaterial); |
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| 117 | |
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| 118 | private: |
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| 119 | |
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| 120 | G4Element* SelectRandomAtom(const G4DynamicParticle* aDynamicGamma, |
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| 121 | G4Material* aMaterial); |
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| 122 | |
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| 123 | private: |
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| 124 | |
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| 125 | // hide assignment operator as private |
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| 126 | G4GammaConversionToMuons& operator=(const G4GammaConversionToMuons &right); |
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| 127 | G4GammaConversionToMuons(const G4GammaConversionToMuons& ); |
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| 128 | |
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| 129 | private: |
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| 130 | |
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| 131 | G4double LowestEnergyLimit ; // low energy limit of the tables |
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| 132 | G4double HighestEnergyLimit ; // high energy limit of the tables |
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| 133 | |
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| 134 | G4double fminimalEnergy; // minimalEnergy of produced particles |
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| 135 | |
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| 136 | G4double MeanFreePath; // actual MeanFreePath (current medium) |
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| 137 | G4double CrossSecFactor; // factor to artificially increase |
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| 138 | // the cross section |
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| 139 | |
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| 140 | }; |
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| 141 | |
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| 142 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 143 | |
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| 144 | #endif |
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| 145 | |
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