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27 // -------------------------------------------------------------------
28 //
29 // GEANT4 Class file
30 //
31 //
32 // File name: G4eeToHadronsMultiModel
33 //
34 // Author: Vladimir Ivanchenko
35 //
36 // Creation date: 02.08.2004
37 //
38 // Modifications:
39 // 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko)
40 // 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
41 //
42
43 //
44 // -------------------------------------------------------------------
45 //
46 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
47 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
48
49 #include "G4eeToHadronsMultiModel.hh"
50 #include "G4PhysicalConstants.hh"
51 #include "G4SystemOfUnits.hh"
52 #include "G4eeToTwoPiModel.hh"
53 #include "G4eeTo3PiModel.hh"
54 #include "G4eeToPGammaModel.hh"
55 #include "G4ee2KNeutralModel.hh"
56 #include "G4ee2KChargedModel.hh"
57 #include "G4eeCrossSections.hh"
58 #include "G4Vee2hadrons.hh"
59 #include "G4Positron.hh"
60
61 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
62
63 using namespace std;
64
65 G4eeToHadronsMultiModel::G4eeToHadronsMultiModel(G4int ver,
66 const G4String& mname) : G4VEmModel(mname), verbose(ver)
67 {
68 maxKineticEnergy = 4.521*CLHEP::GeV; //crresponding to 10TeV in lab
69 delta = 1.0*CLHEP::MeV; //for bin width
70 }
71
72 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
73
74 G4eeToHadronsMultiModel::~G4eeToHadronsMultiModel()
75 {
76 delete cross;
77 }
78
79 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
80
81 void G4eeToHadronsMultiModel::Initialise(const G4ParticleDefinition*,
82 const G4DataVector& cuts)
83 {
84 if(!isInitialised) {
85 isInitialised = true;
86
87 //G4cout<<"###Initialise in HadronMultiModel###"<<G4endl;
88
89 cross = new G4eeCrossSections();
90
91 G4eeToTwoPiModel* m2pi =
92 new G4eeToTwoPiModel(cross,maxKineticEnergy,delta);
93 AddEEModel(m2pi,cuts);
94
95 G4eeTo3PiModel* m3pi =
96 new G4eeTo3PiModel(cross,maxKineticEnergy,delta);
97 AddEEModel(m3pi,cuts);
98
99 G4ee2KChargedModel* m2kc =
100 new G4ee2KChargedModel(cross,maxKineticEnergy,delta);
101 AddEEModel(m2kc,cuts);
102
103 G4ee2KNeutralModel* m2kn =
104 new G4ee2KNeutralModel(cross,maxKineticEnergy,delta);
105 AddEEModel(m2kn,cuts);
106
107 G4eeToPGammaModel* mpg1 =
108 new G4eeToPGammaModel(cross,"pi0",maxKineticEnergy,delta);
109 AddEEModel(mpg1,cuts);
110
111 G4eeToPGammaModel* mpg2 =
112 new G4eeToPGammaModel(cross,"eta",maxKineticEnergy,delta);
113 AddEEModel(mpg2,cuts);
114
115 nModels = (G4int)models.size();
116
117 fParticleChange = GetParticleChangeForGamma();
118 }
119 }
120
121 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
122
123 void G4eeToHadronsMultiModel::AddEEModel(G4Vee2hadrons* mod,
124 const G4DataVector& cuts)
125 {
126 G4eeToHadronsModel* model = new G4eeToHadronsModel(mod, verbose);
127 models.push_back(model);
128 G4double elow = mod->LowEnergy();
129 ekinMin.push_back(elow);
130 if(thKineticEnergy > elow) { thKineticEnergy = elow; }
131 ekinMax.push_back(mod->HighEnergy());
132 ekinPeak.push_back(mod->PeakEnergy());
133 cumSum.push_back(0.0);
134
135 const G4ParticleDefinition* positron = G4Positron::Positron();
136 model->Initialise(positron,cuts);
137 }
138
139 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
140
141 G4double G4eeToHadronsMultiModel::CrossSectionPerVolume(
142 const G4Material* mat,
143 const G4ParticleDefinition* p,
144 G4double kineticEnergy,
145 G4double, G4double)
146 {
147 return mat->GetElectronDensity()*
148 ComputeCrossSectionPerElectron(p, kineticEnergy);
149 }
150
151 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
152
153 G4double G4eeToHadronsMultiModel::ComputeCrossSectionPerAtom(
154 const G4ParticleDefinition* p,
155 G4double kineticEnergy,
156 G4double Z, G4double,
157 G4double, G4double)
158 {
159 return Z*ComputeCrossSectionPerElectron(p, kineticEnergy);
160 }
161
162 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
163
164 G4double G4eeToHadronsMultiModel::ComputeCrossSectionPerElectron(const G4ParticleDefinition*,
165 G4double kineticEnergy,
166 G4double, G4double)
167 {
168 G4double res = 0.0;
169
170 G4double energy = LabToCM(kineticEnergy);
171
172 if (energy > thKineticEnergy) {
173 for(G4int i=0; i<nModels; i++) {
174 if(energy >= ekinMin[i] && energy <= ekinMax[i]){
175 res += (models[i])->ComputeCrossSectionPerElectron(0,energy);
176 }
177 cumSum[i] = res;
178 }
179 }
180 return res*csFactor;
181 }
182
183 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
184
185 void G4eeToHadronsMultiModel::SampleSecondaries(
186 std::vector<G4DynamicParticle*>* newp,
187 const G4MaterialCutsCouple* couple,
188 const G4DynamicParticle* dp,
189 G4double, G4double)
190 {
191 G4double kinEnergy = dp->GetKineticEnergy();
192 G4double energy = LabToCM(kinEnergy);
193 if (energy > thKineticEnergy) {
194 G4double q = cumSum[nModels-1]*G4UniformRand();
195 for(G4int i=0; i<nModels; ++i) {
196 if(q <= cumSum[i]) {
197 (models[i])->SampleSecondaries(newp, couple,dp);
198 if(newp->size() > 0) {
199 fParticleChange->ProposeTrackStatus(fStopAndKill);
200 }
201 break;
202 }
203 }
204 }
205 }
206
207 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
208
209 void G4eeToHadronsMultiModel::ModelDescription(std::ostream& outFile) const
210 {
211 if(verbose > 0) {
212 G4double e1 = 0.5*thKineticEnergy*thKineticEnergy/electron_mass_c2
213 - 2.0*electron_mass_c2;
214 G4double e2 = 0.5*maxKineticEnergy*maxKineticEnergy/electron_mass_c2
215 - 2.0*electron_mass_c2;
216 outFile << " e+ annihilation into hadrons active from "
217 << e1/GeV << " GeV to " << e2/GeV << " GeV" << G4endl;
218 }
219 }
220
221 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
222
223 void G4eeToHadronsMultiModel::SetCrossSecFactor(G4double fac)
224 {
225 if(fac > 1.0) {
226 csFactor = fac;
227 if(verbose > 0) {
228 G4cout << "### G4eeToHadronsMultiModel: The cross section for "
229 << "G4eeToHadronsMultiModel is increased by "
230 << csFactor << " times" << G4endl;
231 }
232 }
233 }
234
235 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
236