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G4MuPairProduction.cc
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25 //
26 // $Id$
27 //
28 // -------------------------------------------------------------------
29 //
30 // GEANT4 Class file
31 //
32 //
33 // File name: G4MuPairProduction
34 //
35 // Author: Laszlo Urban
36 //
37 // Creation date: 30.05.1998
38 //
39 // Modifications:
40 //
41 // 04-06-98 in DoIt,secondary production condition:
42 // range>std::min(threshold,safety)
43 // 26-10-98 new stuff from R. Kokoulin + cleanup , L.Urban
44 // 06-05-99 bug fixed , L.Urban
45 // 10-02-00 modifications+bug fix , new e.m. structure, L.Urban
46 // 29-05-01 V.Ivanchenko minor changes to provide ANSI -wall compilation
47 // 10-08-01 new methods Store/Retrieve PhysicsTable (mma)
48 // 17-09-01 migration of Materials to pure STL (mma)
49 // 20-09-01 (L.Urban) in ComputeMicroscopicCrossSection, remove:
50 // if(MaxPairEnergy<CutInPairEnergy) MaxPairEnergy=CutInPairEnergy
51 // 26-09-01 completion of store/retrieve PhysicsTable
52 // 28-09-01 suppression of theMuonPlus ..etc..data members (mma)
53 // 29-10-01 all static functions no more inlined (mma)
54 // 07-11-01 particleMass becomes a local variable (mma)
55 // 19-08-02 V.Ivanchenko update to new design
56 // 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko)
57 // 26-12-02 Secondary production moved to derived classes (V.Ivanchenko)
58 // 13-02-03 SubCutoff regime is assigned to a region (V.Ivanchenko)
59 // 08-08-03 STD substitute standard (V.Ivanchenko)
60 // 27-09-03 e+ set to be a secondary particle (V.Ivanchenko)
61 // 12-11-03 G4EnergyLossSTD -> G4EnergyLossProcess (V.Ivanchenko)
62 // 10-02-04 Add lowestKinEnergy (V.Ivanchenko)
63 // 17-08-04 Utilise mu+ tables for mu- (V.Ivanchenko)
64 // 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko)
65 // 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
66 //
67 // -------------------------------------------------------------------
68 //
69 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
71 
72 #include "G4MuPairProduction.hh"
73 #include "G4SystemOfUnits.hh"
74 #include "G4Electron.hh"
75 #include "G4Positron.hh"
76 #include "G4MuonPlus.hh"
77 #include "G4MuonMinus.hh"
78 #include "G4MuPairProductionModel.hh"
79 #include "G4UniversalFluctuation.hh"
80 
81 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
82 
83 using namespace std;
84 
85 G4MuPairProduction::G4MuPairProduction(const G4String& name)
86  : G4VEnergyLossProcess(name),
87  theParticle(0),
88  theBaseParticle(0),
89  lowestKinEnergy(1.*GeV),
90  isInitialised(false)
91 {
92  SetProcessSubType(fPairProdByCharged);
93  SetSecondaryParticle(G4Positron::Positron());
94  SetIonisation(false);
95 }
96 
97 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
98 
99 G4MuPairProduction::~G4MuPairProduction()
100 {}
101 
102 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
103 
104 G4bool G4MuPairProduction::IsApplicable(const G4ParticleDefinition& p)
105 {
106  return (p.GetPDGCharge() != 0.0 && p.GetPDGMass() > 10.0*MeV);
107 }
108 
109 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
110 
111 G4double G4MuPairProduction::MinPrimaryEnergy(const G4ParticleDefinition*,
112  const G4Material*,
113  G4double)
114 {
115  return lowestKinEnergy;
116 }
117 
118 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
119 
120 void G4MuPairProduction::InitialiseEnergyLossProcess(
121  const G4ParticleDefinition* part,
122  const G4ParticleDefinition*)
123 {
124  if (!isInitialised) {
125  isInitialised = true;
126 
127  theParticle = part;
128 
129  if (!EmModel()) { SetEmModel(new G4MuPairProductionModel()); }
130 
131  G4VEmFluctuationModel* fm = 0;
132  EmModel()->SetLowEnergyLimit(MinKinEnergy());
133  EmModel()->SetHighEnergyLimit(MaxKinEnergy());
134  AddEmModel(1, EmModel(), fm);
135  }
136 }
137 
138 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
139 
140 void G4MuPairProduction::PrintInfo()
141 {}
142 
143 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
144 
145 
146 
147 
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