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25 //
26 //
27 // -------------------------------------------------------------------
28 //
29 // GEANT4 Class file
30 //
31 //
32 // File name: G4MuonToMuonPairProduction
33 //
34 // Author: Siddharth Yajaman on the base of Vladamir Ivantchenko/Laszlo Urban code
35 //
36 // Creation date: 12.07.2022
37 //
38 // Modifications:
39 //
40 //
41 // -------------------------------------------------------------------
42 //
43 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
44 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
45
46 #include "G4MuonToMuonPairProduction.hh"
47 #include "G4SystemOfUnits.hh"
48 #include "G4MuonPlus.hh"
49 #include "G4VEmModel.hh"
50 #include "G4MuonToMuonPairProductionModel.hh"
51 #include "G4ElementData.hh"
52 #include "G4EmParameters.hh"
53
54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
55
56 G4MuonToMuonPairProduction::G4MuonToMuonPairProduction(const G4String& name)
57 : G4MuPairProduction(name)
58 {
59 SetProcessSubType(49);
60 SetSecondaryParticle(G4MuonPlus::MuonPlus());
61 }
62
63 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
64
65 void G4MuonToMuonPairProduction::InitialiseEnergyLossProcess(
66 const G4ParticleDefinition* part,
67 const G4ParticleDefinition*)
68 {
69 if (isInitialised) { return; }
70 isInitialised = true;
71
72 theParticle = part;
73 lowestKinEnergy = std::max(lowestKinEnergy, part->GetPDGMass()*8.0);
74
75 G4VEmModel* mod = EmModel(0);
76 if(nullptr == mod) {
77 mod = new G4MuonToMuonPairProductionModel(part);
78 SetEmModel(mod);
79 }
80
81 G4VEmFluctuationModel* fm = nullptr;
82 G4EmParameters* param = G4EmParameters::Instance();
83 mod->SetLowEnergyLimit(param->MinKinEnergy());
84 mod->SetHighEnergyLimit(param->MaxKinEnergy());
85 mod->SetSecondaryThreshold(param->MuHadBremsstrahlungTh());
86 AddEmModel(1, mod, fm);
87 }
88
89 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
90
91 void G4MuonToMuonPairProduction::ProcessDescription(std::ostream& out) const
92 {
93 out << " Muon-anti-muon pair production by muons";
94 G4MuPairProduction::ProcessDescription(out);
95 }
96
97 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
98