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G4EmMultiModel.cc
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27 // -------------------------------------------------------------------
28 //
29 // GEANT4 Class file
30 //
31 //
32 // File name: G4EmMultiModel
33 //
34 // Author: Vladimir Ivanchenko
35 //
36 // Creation date: 03.05.2004
37 //
38 // Modifications:
39 // 15-04-05 optimize internal interface (V.Ivanchenko)
40 // 04-07-10 updated interfaces according to g4 9.4 (V.Ivanchenko)
41 //
42 
43 
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46 
47 #include "G4EmMultiModel.hh"
48 #include "Randomize.hh"
49 
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51 
53  : G4VEmModel(nam), nModels(0)
54 {
55  model.clear();
56  cross_section.clear();
57 }
58 
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60 
62 {}
63 
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65 
67 {
68  cross_section.push_back(0.0);
69  model.push_back(p);
70  ++nModels;
71 }
72 
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74 
76  const G4DataVector& cuts)
77 {
78  if(nModels > 0) {
79  G4cout << "### Initialisation of EM MultiModel " << GetName()
80  << " including following list of models:" << G4endl;
81  for(G4int i=0; i<nModels; ++i) {
82  G4cout << " " << (model[i])->GetName();
84  (model[i])->Initialise(p, cuts);
85  }
86  G4cout << G4endl;
87  }
88 }
89 
90 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
91 
93  const G4ParticleDefinition* p,
94  G4double kineticEnergy,
95  G4double cutEnergy)
96 {
97  SetCurrentCouple(couple);
98  G4double dedx = 0.0;
99 
100  if(nModels > 0) {
101  for(G4int i=0; i<nModels; i++) {
102  dedx += (model[i])->ComputeDEDX(couple, p, cutEnergy, kineticEnergy);
103  }
104  }
105 
106  return dedx;
107 }
108 
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110 
112  G4double kinEnergy,
113  G4double Z,
114  G4double A,
115  G4double cutEnergy,
116  G4double maxEnergy)
117 {
118  G4double cross = 0.0;
119  if(nModels>0) {
120  for(G4int i=0; i<nModels; ++i) {
122  cross += (model[i])->ComputeCrossSectionPerAtom(p, kinEnergy, Z, A,
123  cutEnergy, maxEnergy);
124  }
125  }
126  return cross;
127 }
128 
129 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
130 
131 void G4EmMultiModel::SampleSecondaries(std::vector<G4DynamicParticle*>* vdp,
132  const G4MaterialCutsCouple* couple,
133  const G4DynamicParticle* dp,
134  G4double minEnergy,
135  G4double maxEnergy)
136 {
137  SetCurrentCouple(couple);
138  if(nModels > 0) {
139  G4int i;
140  G4double cross = 0.0;
141  for(i=0; i<nModels; ++i) {
142  cross += (model[i])->CrossSection(couple, dp->GetParticleDefinition(),
143  dp->GetKineticEnergy(), minEnergy, maxEnergy);
144  cross_section[i] = cross;
145  }
146 
147  cross *= G4UniformRand();
148 
149  for(i=0; i<nModels; ++i) {
150  if(cross <= cross_section[i]) {
151  (model[i])->SampleSecondaries(vdp, couple, dp, minEnergy, maxEnergy);
152  return;
153  }
154  }
155  }
156 }
157 
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159