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G4LivermoreRayleighModel.cc
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25 //
26 // Author: Sebastien Incerti
27 // 31 March 2012
28 // on base of G4LivermoreRayleighModel
29 //
30 
32 #include "G4SystemOfUnits.hh"
34 
35 using namespace std;
36 
37 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
38 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
39 
41  :G4VEmModel("LivermoreRayleigh"),isInitialised(false),maxZ(100)
42 {
43  fParticleChange = 0;
44  lowEnergyLimit = 10 * eV;
45 
46  dataCS.resize(maxZ+1,0);
47 
49 
50  verboseLevel= 0;
51  // Verbosity scale for debugging purposes:
52  // 0 = nothing
53  // 1 = calculation of cross sections, file openings...
54  // 2 = entering in methods
55 
56  if(verboseLevel > 0)
57  {
58  G4cout << "G4LivermoreRayleighModel is constructed " << G4endl;
59  }
60 
61 }
62 
63 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
64 
66 {
67  for(G4int i=0; i<=maxZ; ++i) { delete dataCS[i]; }
68 }
69 
70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
71 
73  const G4DataVector& cuts)
74 {
75  if (verboseLevel > 1)
76  {
77  G4cout << "Calling Initialise() of G4LivermoreRayleighModel." << G4endl
78  << "Energy range: "
79  << LowEnergyLimit() / eV << " eV - "
80  << HighEnergyLimit() / GeV << " GeV"
81  << G4endl;
82  }
83 
84  // Initialise element selector
85  InitialiseElementSelectors(particle, cuts);
86 
87  // Access to elements
88 
89  char* path = getenv("G4LEDATA");
90  G4ProductionCutsTable* theCoupleTable =
92  G4int numOfCouples = theCoupleTable->GetTableSize();
93 
94  for(G4int i=0; i<numOfCouples; ++i)
95  {
96  const G4MaterialCutsCouple* couple =
97  theCoupleTable->GetMaterialCutsCouple(i);
98  const G4Material* material = couple->GetMaterial();
99  const G4ElementVector* theElementVector = material->GetElementVector();
100  G4int nelm = material->GetNumberOfElements();
101 
102  for (G4int j=0; j<nelm; ++j)
103  {
104  G4int Z = G4lrint((*theElementVector)[j]->GetZ());
105  if(Z < 1) { Z = 1; }
106  else if(Z > maxZ) { Z = maxZ; }
107  if( (!dataCS[Z]) ) { ReadData(Z, path); }
108  }
109  }
110  //
111 
112  //fGenerator->PrintGeneratorInformation();
113 
114  if(isInitialised) { return; }
115  fParticleChange = GetParticleChangeForGamma();
116  isInitialised = true;
117 
118 }
119 
120 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
121 
122 void G4LivermoreRayleighModel::ReadData(size_t Z, const char* path)
123 {
124  if (verboseLevel > 1)
125  {
126  G4cout << "Calling ReadData() of G4LivermoreRayleighModel"
127  << G4endl;
128  }
129 
130  if(dataCS[Z]) { return; }
131 
132  const char* datadir = path;
133 
134  if(!datadir)
135  {
136  datadir = getenv("G4LEDATA");
137  if(!datadir)
138  {
139  G4Exception("G4LivermoreRayleighModelModel::ReadData()","em0006",
141  "Environment variable G4LEDATA not defined");
142  return;
143  }
144  }
145 
146  //
147 
148  dataCS[Z] = new G4LPhysicsFreeVector();
149 
150  // Activation of spline interpolation
151  //dataCS[Z] ->SetSpline(true);
152 
153  std::ostringstream ostCS;
154  ostCS << datadir << "/livermore/rayl/re-cs-" << Z <<".dat";
155  std::ifstream finCS(ostCS.str().c_str());
156 
157  if( !finCS .is_open() )
158  {
160  ed << "G4LivermoreRayleighModel data file <" << ostCS.str().c_str()
161  << "> is not opened!" << G4endl;
162  G4Exception("G4LivermoreRayleighModel::ReadData()","em0003",FatalException,
163  ed,"G4LEDATA version should be G4EMLOW6.27 or later.");
164  return;
165  }
166  else
167  {
168  if(verboseLevel > 3) {
169  G4cout << "File " << ostCS.str()
170  << " is opened by G4LivermoreRayleighModel" << G4endl;
171  }
172  dataCS[Z]->Retrieve(finCS, true);
173  }
174 }
175 
176 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
177 
179  const G4ParticleDefinition*,
180  G4double GammaEnergy,
181  G4double Z, G4double,
183 {
184  if (verboseLevel > 1)
185  {
186  G4cout << "Calling ComputeCrossSectionPerAtom() of G4LivermoreRayleighModel"
187  << G4endl;
188  }
189 
190  if(GammaEnergy < lowEnergyLimit) { return 0.0; }
191 
192  G4double xs = 0.0;
193 
194  G4int intZ = G4lrint(Z);
195 
196  if(intZ < 1 || intZ > maxZ) { return xs; }
197 
198  G4LPhysicsFreeVector* pv = dataCS[intZ];
199 
200  // element was not initialised
201  if(!pv)
202  {
203  char* path = getenv("G4LEDATA");
204  ReadData(intZ, path);
205  pv = dataCS[intZ];
206  if(!pv) { return xs; }
207  }
208 
209  G4int n = pv->GetVectorLength() - 1;
210  G4double e = GammaEnergy/MeV;
211  if(e >= pv->Energy(n)) {
212  xs = (*pv)[n]/(e*e);
213  } else if(e >= pv->Energy(0)) {
214  xs = pv->Value(e)/(e*e);
215  }
216 
217  if(verboseLevel > 0)
218  {
219  G4cout << "****** DEBUG: tcs value for Z=" << Z << " at energy (MeV)=" << e << G4endl;
220  G4cout << " cs (Geant4 internal unit)=" << xs << G4endl;
221  G4cout << " -> first E*E*cs value in CS data file (iu) =" << (*pv)[0] << G4endl;
222  G4cout << " -> last E*E*cs value in CS data file (iu) =" << (*pv)[n] << G4endl;
223  G4cout << "*********************************************************" << G4endl;
224  }
225  return xs;
226 }
227 
228 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
229 
231  std::vector<G4DynamicParticle*>*,
232  const G4MaterialCutsCouple* couple,
233  const G4DynamicParticle* aDynamicGamma,
235 {
236  if (verboseLevel > 1) {
237  G4cout << "Calling SampleSecondaries() of G4LivermoreRayleighModel"
238  << G4endl;
239  }
240  G4double photonEnergy0 = aDynamicGamma->GetKineticEnergy();
241 
242  // absorption of low-energy gamma
243  if (photonEnergy0 <= lowEnergyLimit)
244  {
245  fParticleChange->ProposeTrackStatus(fStopAndKill);
246  fParticleChange->SetProposedKineticEnergy(0.);
247  fParticleChange->ProposeLocalEnergyDeposit(photonEnergy0);
248  return ;
249  }
250 
251  // Select randomly one element in the current material
252  const G4ParticleDefinition* particle = aDynamicGamma->GetDefinition();
253  const G4Element* elm = SelectRandomAtom(couple,particle,photonEnergy0);
254  G4int Z = G4lrint(elm->GetZ());
255 
256  // Sample the angle of the scattered photon
257 
258  G4ThreeVector photonDirection =
259  GetAngularDistribution()->SampleDirection(aDynamicGamma,
260  photonEnergy0, Z, couple->GetMaterial());
261  fParticleChange->ProposeMomentumDirection(photonDirection);
262 }
263 
264 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....