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GammaLeptoNuclearPhysics.cc
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1 // $Id: $
3 // //
4 // File: GammaLeptoNuclearPhysics.cc //
5 // Description: Gamma-nuclear, electro-nuclear and muon-nuclear physics //
6 // constructor for EICPhysicsList //
7 // //
8 // Author: Dennis H. Wright (SLAC) //
9 // Date: 20 July 2018 //
10 // //
12 
13 
14 #include "GammaLeptoNuclearPhysics.hh"
15 
16 #include <Geant4/G4ProcessManager.hh>
17 #include <Geant4/G4PhotoNuclearProcess.hh>
18 #include <Geant4/G4ElectronNuclearProcess.hh>
19 #include <Geant4/G4PositronNuclearProcess.hh>
20 #include <Geant4/G4MuonNuclearProcess.hh>
21 
22 #include <Geant4/G4CascadeInterface.hh>
23 #include <Geant4/G4ElectroVDNuclearModel.hh>
24 #include <Geant4/G4MuonVDNuclearModel.hh>
25 
26 #include <Geant4/G4TheoFSGenerator.hh>
27 #include <Geant4/G4ExcitedStringDecay.hh>
28 #include <Geant4/G4QGSMFragmentation.hh>
29 #include <Geant4/G4GeneratorPrecompoundInterface.hh>
30 
31 #include <Geant4/G4SystemOfUnits.hh>
32 
33 
34 GammaLeptoNuclearPhysics::GammaLeptoNuclearPhysics():
35  qgsp(nullptr),
36  stringModel(nullptr),
37  stringDecay(nullptr),
38  fragModel(nullptr),
39  preCompoundModel(nullptr)
40 {}
41 
42 
43 GammaLeptoNuclearPhysics::~GammaLeptoNuclearPhysics()
44 {
45  delete stringDecay;
46  delete stringModel;
47  delete fragModel;
48  delete preCompoundModel;
49 }
50 
51 
52 void GammaLeptoNuclearPhysics::ConstructProcess()
53 {
54  // Use Bertini cascade for low energies
55  G4CascadeInterface* theGammaReaction = new G4CascadeInterface;
56  theGammaReaction->SetMinEnergy(0.0);
57  theGammaReaction->SetMaxEnergy(3.5*GeV);
58 
59  // Use QGSP for high energies
60  qgsp = new G4TheoFSGenerator("QGSP");
61  stringModel = new G4QGSModel<G4GammaParticipants>;
62  stringDecay =
63  new G4ExcitedStringDecay(fragModel = new G4QGSMFragmentation);
64  stringModel->SetFragmentationModel(stringDecay);
65  preCompoundModel = new G4GeneratorPrecompoundInterface();
66 
67  qgsp->SetHighEnergyGenerator(stringModel);
68  qgsp->SetTransport(preCompoundModel);
69  qgsp->SetMinEnergy(3*GeV);
70  qgsp->SetMaxEnergy(100*TeV);
71 
72  // Lepto-nuclear models
73  G4ElectroVDNuclearModel* evdn = new G4ElectroVDNuclearModel;
74  G4MuonVDNuclearModel* mvdn = new G4MuonVDNuclearModel;
75 
76 
77  G4ProcessManager* procMan = 0;
78 
79  // Gamma
80  procMan = G4Gamma::Gamma()->GetProcessManager();
81  G4PhotoNuclearProcess* pnProc = new G4PhotoNuclearProcess;
82  pnProc->RegisterMe(theGammaReaction);
83  pnProc->RegisterMe(qgsp);
84  procMan->AddDiscreteProcess(pnProc);
85 
86  // Electron
87  procMan = G4Electron::Electron()->GetProcessManager();
88  G4ElectronNuclearProcess* emn = new G4ElectronNuclearProcess;
89  emn->RegisterMe(evdn);
90  procMan->AddDiscreteProcess(emn);
91 
92  // Positron
93  procMan = G4Positron::Positron()->GetProcessManager();
94  G4PositronNuclearProcess* epn = new G4PositronNuclearProcess;
95  epn->RegisterMe(evdn);
96  procMan->AddDiscreteProcess(epn);
97 
98  // Muon-
99  procMan = G4MuonMinus::MuonMinus()->GetProcessManager();
100  G4MuonNuclearProcess* mun = new G4MuonNuclearProcess;
101  mun->RegisterMe(mvdn);
102  procMan->AddDiscreteProcess(mun);
103 
104  // Muon+
105  procMan = G4MuonPlus::MuonPlus()->GetProcessManager();
106  procMan->AddDiscreteProcess(mun);
107 
108 }
109 
110 
111 void GammaLeptoNuclearPhysics::ConstructParticle()
112 {}
113