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