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25 // 25 //
>> 26 // $Id: G4PAIPhotModel.cc 73607 2013-09-02 10:04:03Z gcosmo $
26 // 27 //
27 // ------------------------------------------- 28 // -------------------------------------------------------------------
28 // 29 //
29 // GEANT4 Class 30 // GEANT4 Class
30 // File name: G4PAIPhotModel.cc 31 // File name: G4PAIPhotModel.cc
31 // 32 //
32 // Author: Vladimir.Grichine@cern.ch on base o 33 // Author: Vladimir.Grichine@cern.ch on base of G4PAIModel MT interface
33 // 34 //
34 // Creation date: 07.10.2013 35 // Creation date: 07.10.2013
35 // 36 //
36 // Modifications: 37 // Modifications:
37 // 38 //
38 // 39 //
39 40
40 #include "G4PAIPhotModel.hh" 41 #include "G4PAIPhotModel.hh"
41 42
42 #include "G4SystemOfUnits.hh" 43 #include "G4SystemOfUnits.hh"
43 #include "G4PhysicalConstants.hh" 44 #include "G4PhysicalConstants.hh"
44 #include "G4Region.hh" 45 #include "G4Region.hh"
>> 46 #include "G4PhysicsLogVector.hh"
>> 47 #include "G4PhysicsFreeVector.hh"
>> 48 #include "G4PhysicsTable.hh"
45 #include "G4ProductionCutsTable.hh" 49 #include "G4ProductionCutsTable.hh"
46 #include "G4MaterialCutsCouple.hh" 50 #include "G4MaterialCutsCouple.hh"
47 #include "G4MaterialTable.hh" 51 #include "G4MaterialTable.hh"
>> 52 #include "G4SandiaTable.hh"
>> 53 #include "G4OrderedTable.hh"
48 #include "G4RegionStore.hh" 54 #include "G4RegionStore.hh"
49 55
50 #include "Randomize.hh" 56 #include "Randomize.hh"
51 #include "G4Electron.hh" 57 #include "G4Electron.hh"
52 #include "G4Positron.hh" 58 #include "G4Positron.hh"
53 #include "G4Gamma.hh" 59 #include "G4Gamma.hh"
54 #include "G4Poisson.hh" 60 #include "G4Poisson.hh"
55 #include "G4Step.hh" 61 #include "G4Step.hh"
56 #include "G4Material.hh" 62 #include "G4Material.hh"
57 #include "G4DynamicParticle.hh" 63 #include "G4DynamicParticle.hh"
58 #include "G4ParticleDefinition.hh" 64 #include "G4ParticleDefinition.hh"
59 #include "G4ParticleChangeForLoss.hh" 65 #include "G4ParticleChangeForLoss.hh"
60 #include "G4PAIPhotData.hh" 66 #include "G4PAIPhotData.hh"
61 #include "G4DeltaAngle.hh" 67 #include "G4DeltaAngle.hh"
62 68
63 ////////////////////////////////////////////// 69 ////////////////////////////////////////////////////////////////////////
64 70
65 using namespace std; 71 using namespace std;
66 72
67 G4PAIPhotModel::G4PAIPhotModel(const G4Particl 73 G4PAIPhotModel::G4PAIPhotModel(const G4ParticleDefinition* p, const G4String& nam)
68 : G4VEmModel(nam),G4VEmFluctuationModel(nam) 74 : G4VEmModel(nam),G4VEmFluctuationModel(nam),
69 fVerbose(0), 75 fVerbose(0),
70 fModelData(nullptr), 76 fModelData(nullptr),
71 fParticle(nullptr) 77 fParticle(nullptr)
72 { 78 {
73 fElectron = G4Electron::Electron(); 79 fElectron = G4Electron::Electron();
74 fPositron = G4Positron::Positron(); 80 fPositron = G4Positron::Positron();
75 81
76 fParticleChange = nullptr; 82 fParticleChange = nullptr;
77 83
78 if(p) { SetParticle(p); } 84 if(p) { SetParticle(p); }
79 else { SetParticle(fElectron); } 85 else { SetParticle(fElectron); }
80 86
81 // default generator 87 // default generator
82 SetAngularDistribution(new G4DeltaAngle()); 88 SetAngularDistribution(new G4DeltaAngle());
83 fLowestTcut = 12.5*CLHEP::eV; 89 fLowestTcut = 12.5*CLHEP::eV;
84 } 90 }
85 91
86 ////////////////////////////////////////////// 92 ////////////////////////////////////////////////////////////////////////////
87 93
88 G4PAIPhotModel::~G4PAIPhotModel() 94 G4PAIPhotModel::~G4PAIPhotModel()
89 { 95 {
>> 96 //G4cout << "G4PAIPhotModel::~G4PAIPhotModel() " << this << G4endl;
90 if(IsMaster()) { delete fModelData; fModelDa 97 if(IsMaster()) { delete fModelData; fModelData = nullptr; }
91 } 98 }
92 99
93 ////////////////////////////////////////////// 100 ////////////////////////////////////////////////////////////////////////////
94 101
95 void G4PAIPhotModel::Initialise(const G4Partic 102 void G4PAIPhotModel::Initialise(const G4ParticleDefinition* p,
96 const G4DataVector& cuts) 103 const G4DataVector& cuts)
97 { 104 {
98 if(fVerbose > 1) << 105 if(fVerbose > 0)
99 { 106 {
100 G4cout<<"G4PAIPhotModel::Initialise for "< 107 G4cout<<"G4PAIPhotModel::Initialise for "<<p->GetParticleName()<<G4endl;
101 } 108 }
102 SetParticle(p); 109 SetParticle(p);
103 fParticleChange = GetParticleChangeForLoss() 110 fParticleChange = GetParticleChangeForLoss();
104 111
105 if( IsMaster() ) 112 if( IsMaster() )
106 { 113 {
>> 114
>> 115 InitialiseElementSelectors(p, cuts);
>> 116
107 delete fModelData; 117 delete fModelData;
108 fMaterialCutsCoupleVector.clear(); 118 fMaterialCutsCoupleVector.clear();
109 119
110 G4double tmin = LowEnergyLimit()*fRatio; 120 G4double tmin = LowEnergyLimit()*fRatio;
111 G4double tmax = HighEnergyLimit()*fRatio; 121 G4double tmax = HighEnergyLimit()*fRatio;
112 fModelData = new G4PAIPhotData(tmin, tmax, 122 fModelData = new G4PAIPhotData(tmin, tmax, fVerbose);
113 123
114 // Prepare initialization 124 // Prepare initialization
115 const G4MaterialTable* theMaterialTable = 125 const G4MaterialTable* theMaterialTable = G4Material::GetMaterialTable();
116 size_t numOfMat = G4Material::GetNumberO 126 size_t numOfMat = G4Material::GetNumberOfMaterials();
117 size_t numRegions = fPAIRegionVector.size( 127 size_t numRegions = fPAIRegionVector.size();
118 128
119 // protect for unit tests 129 // protect for unit tests
120 if(0 == numRegions) { 130 if(0 == numRegions) {
121 G4Exception("G4PAIModel::Initialise()"," 131 G4Exception("G4PAIModel::Initialise()","em0106",JustWarning,
122 "no G4Regions are registered 132 "no G4Regions are registered for the PAI model - World is used");
123 fPAIRegionVector.push_back(G4RegionStore 133 fPAIRegionVector.push_back(G4RegionStore::GetInstance()
124 ->GetRegion("DefaultRegionForTheWorld 134 ->GetRegion("DefaultRegionForTheWorld", false));
125 numRegions = 1; 135 numRegions = 1;
126 } 136 }
127 137
128 for( size_t iReg = 0; iReg < numRegions; + 138 for( size_t iReg = 0; iReg < numRegions; ++iReg )
129 { 139 {
130 const G4Region* curReg = fPAIRegionVecto 140 const G4Region* curReg = fPAIRegionVector[iReg];
131 G4Region* reg = const_cast<G4Region*>(cu 141 G4Region* reg = const_cast<G4Region*>(curReg);
132 142
133 for(size_t jMat = 0; jMat < numOfMat; ++ 143 for(size_t jMat = 0; jMat < numOfMat; ++jMat)
134 { 144 {
135 G4Material* mat = (*theMaterialTable)[jMat]; 145 G4Material* mat = (*theMaterialTable)[jMat];
136 const G4MaterialCutsCouple* cutCouple = reg- 146 const G4MaterialCutsCouple* cutCouple = reg->FindCouple(mat);
137 if(nullptr != cutCouple) << 147 //G4cout << "Couple <" << fCutCouple << G4endl;
>> 148 if(cutCouple)
138 { 149 {
139 if(fVerbose > 1) << 150 if(fVerbose>0)
140 { 151 {
141 G4cout << "Reg <" <<curReg->GetName() << 152 G4cout << "Reg <" <<curReg->GetName() << "> mat <"
142 << mat->GetName() << "> fCouple= " 153 << mat->GetName() << "> fCouple= "
143 << cutCouple << ", idx= " << cutCouple-> 154 << cutCouple << ", idx= " << cutCouple->GetIndex()
144 <<" " << p->GetParticleName() 155 <<" " << p->GetParticleName()
145 <<", cuts.size() = " << cuts.size() << G 156 <<", cuts.size() = " << cuts.size() << G4endl;
146 } 157 }
147 // check if this couple is not already ini 158 // check if this couple is not already initialized
148 159
149 size_t n = fMaterialCutsCoupleVector.size( 160 size_t n = fMaterialCutsCoupleVector.size();
150 161
151 G4bool isnew = true; 162 G4bool isnew = true;
152 if( 0 < n ) 163 if( 0 < n )
153 { 164 {
154 for(size_t i=0; i<fMaterialCutsCoupleVec 165 for(size_t i=0; i<fMaterialCutsCoupleVector.size(); ++i)
155 { 166 {
156 if(cutCouple == fMaterialCutsCoupleVec 167 if(cutCouple == fMaterialCutsCoupleVector[i]) {
157 isnew = false; 168 isnew = false;
158 break; 169 break;
159 } 170 }
160 } 171 }
161 } 172 }
162 // initialise data banks 173 // initialise data banks
163 if(isnew) { 174 if(isnew) {
164 fMaterialCutsCoupleVector.push_back(cutC 175 fMaterialCutsCoupleVector.push_back(cutCouple);
165 G4double deltaCutInKinEnergy = cuts[cutC 176 G4double deltaCutInKinEnergy = cuts[cutCouple->GetIndex()];
166 fModelData->Initialise(cutCouple, deltaC 177 fModelData->Initialise(cutCouple, deltaCutInKinEnergy, this);
167 } 178 }
168 } 179 }
169 } 180 }
170 } 181 }
171 InitialiseElementSelectors(p, cuts); <<
172 } 182 }
173 } 183 }
174 184
175 ////////////////////////////////////////////// 185 /////////////////////////////////////////////////////////////////////////
176 186
177 void G4PAIPhotModel::InitialiseLocal(const G4P 187 void G4PAIPhotModel::InitialiseLocal(const G4ParticleDefinition*,
178 G4VEmModel* masterModel) 188 G4VEmModel* masterModel)
179 { 189 {
180 fModelData = static_cast<G4PAIPhotModel*>(ma 190 fModelData = static_cast<G4PAIPhotModel*>(masterModel)->GetPAIPhotData();
181 fMaterialCutsCoupleVector = static_cast<G4PA 191 fMaterialCutsCoupleVector = static_cast<G4PAIPhotModel*>(masterModel)->GetVectorOfCouples();
182 SetElementSelectors( masterModel->GetElement 192 SetElementSelectors( masterModel->GetElementSelectors() );
183 } 193 }
184 194
185 ////////////////////////////////////////////// 195 //////////////////////////////////////////////////////////////////////////////
186 196
187 G4double G4PAIPhotModel::MinEnergyCut(const G4 197 G4double G4PAIPhotModel::MinEnergyCut(const G4ParticleDefinition*,
188 const G4MaterialCutsCouple*) 198 const G4MaterialCutsCouple*)
189 { 199 {
190 return fLowestTcut; 200 return fLowestTcut;
191 } 201 }
192 202
193 ////////////////////////////////////////////// 203 //////////////////////////////////////////////////////////////////////////////
194 204
195 G4double G4PAIPhotModel::ComputeDEDXPerVolume( 205 G4double G4PAIPhotModel::ComputeDEDXPerVolume(const G4Material*,
196 const G4ParticleDefinition* p, 206 const G4ParticleDefinition* p,
197 G4double kineticEnergy, 207 G4double kineticEnergy,
198 G4double cutEnergy) 208 G4double cutEnergy)
199 { 209 {
200 G4int coupleIndex = FindCoupleIndex(CurrentC 210 G4int coupleIndex = FindCoupleIndex(CurrentCouple());
201 if(0 > coupleIndex) { return 0.0; } 211 if(0 > coupleIndex) { return 0.0; }
202 212
203 G4double cut = std::min(MaxSecondaryEnergy(p 213 G4double cut = std::min(MaxSecondaryEnergy(p, kineticEnergy), cutEnergy);
>> 214
204 G4double scaledTkin = kineticEnergy*fRatio; 215 G4double scaledTkin = kineticEnergy*fRatio;
205 G4double dedx = fChargeSquare*fModelData->DE << 216
206 return dedx; << 217 return fChargeSquare*fModelData->DEDXPerVolume(coupleIndex, scaledTkin, cut);
207 } 218 }
208 219
209 ////////////////////////////////////////////// 220 /////////////////////////////////////////////////////////////////////////
210 221
211 G4double G4PAIPhotModel::CrossSectionPerVolume 222 G4double G4PAIPhotModel::CrossSectionPerVolume( const G4Material*,
212 const G4ParticleDefinition* p, 223 const G4ParticleDefinition* p,
213 G4double kineticEnergy, 224 G4double kineticEnergy,
214 G4double cutEnergy, 225 G4double cutEnergy,
215 G4double maxEnergy ) 226 G4double maxEnergy )
216 { 227 {
217 G4int coupleIndex = FindCoupleIndex(CurrentC 228 G4int coupleIndex = FindCoupleIndex(CurrentCouple());
218 if(0 > coupleIndex) { return 0.0; } << 229
>> 230 if(0 > coupleIndex) return 0.0;
219 231
220 G4double tmax = std::min(MaxSecondaryEnergy( 232 G4double tmax = std::min(MaxSecondaryEnergy(p, kineticEnergy), maxEnergy);
221 if(tmax <= cutEnergy) { return 0.0; } << 233
>> 234 if(tmax <= cutEnergy) return 0.0;
222 235
223 G4double scaledTkin = kineticEnergy*fRatio; 236 G4double scaledTkin = kineticEnergy*fRatio;
224 G4double xs = fChargeSquare*fModelData->Cros << 237 G4double xsc = fChargeSquare*fModelData->CrossSectionPerVolume(coupleIndex,
225 scal << 238 scaledTkin,
226 return xs; << 239 cutEnergy, tmax);
>> 240 return xsc;
227 } 241 }
228 242
229 ////////////////////////////////////////////// 243 ///////////////////////////////////////////////////////////////////////////
230 // 244 //
231 // It is analog of PostStepDoIt in terms of se 245 // It is analog of PostStepDoIt in terms of secondary electron.
232 // 246 //
233 247
234 void G4PAIPhotModel::SampleSecondaries(std::ve 248 void G4PAIPhotModel::SampleSecondaries(std::vector<G4DynamicParticle*>* vdp,
235 const G4MaterialCutsCouple* matCC, 249 const G4MaterialCutsCouple* matCC,
236 const G4DynamicParticle* dp, 250 const G4DynamicParticle* dp,
237 G4double tmin, 251 G4double tmin,
238 G4double maxEnergy) 252 G4double maxEnergy)
239 { 253 {
240 G4int coupleIndex = FindCoupleIndex(matCC); 254 G4int coupleIndex = FindCoupleIndex(matCC);
241 if(0 > coupleIndex) { return; } 255 if(0 > coupleIndex) { return; }
242 256
243 SetParticle(dp->GetDefinition()); 257 SetParticle(dp->GetDefinition());
244 258
245 G4double kineticEnergy = dp->GetKineticEnerg 259 G4double kineticEnergy = dp->GetKineticEnergy();
246 260
247 G4double tmax = MaxSecondaryEnergy(fParticle 261 G4double tmax = MaxSecondaryEnergy(fParticle, kineticEnergy);
248 262
249 if( maxEnergy < tmax) tmax = maxEnergy; 263 if( maxEnergy < tmax) tmax = maxEnergy;
250 if( tmin >= tmax) return; 264 if( tmin >= tmax) return;
251 265
252 G4ThreeVector direction = dp->GetMomentumDir 266 G4ThreeVector direction = dp->GetMomentumDirection();
253 G4double scaledTkin = kineticEnergy*fRat 267 G4double scaledTkin = kineticEnergy*fRatio;
254 G4double totalEnergy = kineticEnergy + fM 268 G4double totalEnergy = kineticEnergy + fMass;
255 G4double totalMomentum = sqrt(kineticEnergy 269 G4double totalMomentum = sqrt(kineticEnergy*(totalEnergy + fMass));
256 G4double plRatio = fModelData->GetPla 270 G4double plRatio = fModelData->GetPlasmonRatio(coupleIndex, scaledTkin);
257 271
258 if( G4UniformRand() <= plRatio ) 272 if( G4UniformRand() <= plRatio )
259 { 273 {
260 G4double deltaTkin = fModelData->SamplePos 274 G4double deltaTkin = fModelData->SamplePostStepPlasmonTransfer(coupleIndex, scaledTkin);
261 275
262 // G4cout<<"G4PAIPhotModel::SampleSecondar 276 // G4cout<<"G4PAIPhotModel::SampleSecondaries; dp "<<dp->GetParticleDefinition()->GetParticleName()
263 // <<"; Tkin = "<<kineticEnergy/keV<<" keV 277 // <<"; Tkin = "<<kineticEnergy/keV<<" keV; transfer = "<<deltaTkin/keV<<" keV "<<G4endl;
264 278
265 if( deltaTkin <= 0. && fVerbose > 0) 279 if( deltaTkin <= 0. && fVerbose > 0)
266 { 280 {
267 G4cout<<"G4PAIPhotModel::SampleSecondary << 281 G4cout<<"G4PAIPhotModel::SampleSecondary e- deltaTkin = "<<deltaTkin<<G4endl;
268 } 282 }
269 if( deltaTkin <= 0.) { return; } << 283 if( deltaTkin <= 0.) return;
270 284
271 if( deltaTkin > tmax) { deltaTkin = tmax; << 285 if( deltaTkin > tmax) deltaTkin = tmax;
272 286
273 const G4Element* anElement = SelectTargetA << 287 const G4Element* anElement = SelectRandomAtom(matCC,fParticle,kineticEnergy);
274 << 288 G4int Z = G4lrint(anElement->GetZ());
275 G4int Z = anElement->GetZasInt(); <<
276 289
277 auto deltaRay = new G4DynamicParticle(fEle << 290 G4DynamicParticle* deltaRay = new G4DynamicParticle(fElectron,
278 GetAngularDistribution()->SampleDirectio 291 GetAngularDistribution()->SampleDirection(dp, deltaTkin,
279 Z, matCC->GetMaterial()), 292 Z, matCC->GetMaterial()),
280 deltaTkin); 293 deltaTkin);
281 294
282 // primary change 295 // primary change
283 296
284 kineticEnergy -= deltaTkin; 297 kineticEnergy -= deltaTkin;
285 298
286 if( kineticEnergy <= 0. ) // kill primary 299 if( kineticEnergy <= 0. ) // kill primary as local? energy deposition
287 { 300 {
288 fParticleChange->SetProposedKineticEnerg 301 fParticleChange->SetProposedKineticEnergy(0.0);
289 fParticleChange->ProposeLocalEnergyDepos 302 fParticleChange->ProposeLocalEnergyDeposit(kineticEnergy+deltaTkin);
>> 303 // fParticleChange->ProposeTrackStatus(fStopAndKill);
290 return; 304 return;
291 } 305 }
292 else 306 else
293 { 307 {
294 G4ThreeVector dir = totalMomentum*direct 308 G4ThreeVector dir = totalMomentum*direction - deltaRay->GetMomentum();
295 direction = dir.unit(); 309 direction = dir.unit();
296 fParticleChange->SetProposedKineticEnerg 310 fParticleChange->SetProposedKineticEnergy(kineticEnergy);
297 fParticleChange->SetProposedMomentumDire 311 fParticleChange->SetProposedMomentumDirection(direction);
298 vdp->push_back(deltaRay); 312 vdp->push_back(deltaRay);
299 } 313 }
300 } 314 }
301 else // secondary X-ray CR photon 315 else // secondary X-ray CR photon
302 { 316 {
303 G4double deltaTkin = fModelData->Sampl 317 G4double deltaTkin = fModelData->SamplePostStepPhotonTransfer(coupleIndex, scaledTkin);
304 318
305 // G4cout<<"PAIPhotonModel PhotonPostStep 319 // G4cout<<"PAIPhotonModel PhotonPostStepTransfer = "<<deltaTkin/keV<<" keV"<<G4endl;
306 320
307 if( deltaTkin <= 0. ) 321 if( deltaTkin <= 0. )
308 { 322 {
309 G4cout<<"G4PAIPhotonModel::SampleSeconda 323 G4cout<<"G4PAIPhotonModel::SampleSecondary gamma deltaTkin = "<<deltaTkin<<G4endl;
310 } 324 }
311 if( deltaTkin <= 0.) return; 325 if( deltaTkin <= 0.) return;
312 326
313 if( deltaTkin >= kineticEnergy ) // stop p 327 if( deltaTkin >= kineticEnergy ) // stop primary
314 { 328 {
315 deltaTkin = kineticEnergy; 329 deltaTkin = kineticEnergy;
316 kineticEnergy = 0.0; 330 kineticEnergy = 0.0;
317 } 331 }
318 G4double costheta = 0.; // G4UniformRand() 332 G4double costheta = 0.; // G4UniformRand(); // VG: ??? for start only
319 G4double sintheta = sqrt((1.+costheta)*(1. 333 G4double sintheta = sqrt((1.+costheta)*(1.-costheta));
320 334
321 // direction of the 'Cherenkov' photon 335 // direction of the 'Cherenkov' photon
322 G4double phi = twopi*G4UniformRand(); 336 G4double phi = twopi*G4UniformRand();
323 G4double dirx = sintheta*cos(phi), diry = 337 G4double dirx = sintheta*cos(phi), diry = sintheta*sin(phi), dirz = costheta;
324 338
325 G4ThreeVector deltaDirection(dirx,diry,dir 339 G4ThreeVector deltaDirection(dirx,diry,dirz);
326 deltaDirection.rotateUz(direction); 340 deltaDirection.rotateUz(direction);
327 341
328 if( kineticEnergy > 0.) // primary change 342 if( kineticEnergy > 0.) // primary change
329 { 343 {
330 kineticEnergy -= deltaTkin; 344 kineticEnergy -= deltaTkin;
331 fParticleChange->SetProposedKineticEnerg 345 fParticleChange->SetProposedKineticEnergy(kineticEnergy);
332 } 346 }
333 else // stop primary, but pass X-ray CR 347 else // stop primary, but pass X-ray CR
334 { 348 {
335 // fParticleChange->ProposeLocalEnergyDe 349 // fParticleChange->ProposeLocalEnergyDeposit(deltaTkin);
336 fParticleChange->SetProposedKineticEnerg 350 fParticleChange->SetProposedKineticEnergy(0.0);
337 } 351 }
338 // create G4DynamicParticle object for pho 352 // create G4DynamicParticle object for photon ray
339 353
340 auto photonRay = new G4DynamicParticle; << 354 G4DynamicParticle* photonRay = new G4DynamicParticle;
341 photonRay->SetDefinition( G4Gamma::Gamma() 355 photonRay->SetDefinition( G4Gamma::Gamma() );
342 photonRay->SetKineticEnergy( deltaTkin ); 356 photonRay->SetKineticEnergy( deltaTkin );
343 photonRay->SetMomentumDirection(deltaDirec 357 photonRay->SetMomentumDirection(deltaDirection);
344 358
345 vdp->push_back(photonRay); 359 vdp->push_back(photonRay);
346 } 360 }
347 return; 361 return;
348 } 362 }
349 363
350 ////////////////////////////////////////////// 364 ///////////////////////////////////////////////////////////////////////
351 365
352 G4double G4PAIPhotModel::SampleFluctuations( << 366 G4double G4PAIPhotModel::SampleFluctuations( const G4MaterialCutsCouple* matCC,
353 const G4MaterialCutsC << 367 const G4DynamicParticle* aParticle,
354 const G4DynamicPartic << 368 G4double, G4double step,
355 const G4double, const << 369 G4double eloss)
356 const G4double step, <<
357 { 370 {
358 // return 0.; 371 // return 0.;
359 G4int coupleIndex = FindCoupleIndex(matCC); 372 G4int coupleIndex = FindCoupleIndex(matCC);
360 if(0 > coupleIndex) { return eloss; } 373 if(0 > coupleIndex) { return eloss; }
361 374
362 SetParticle(aParticle->GetDefinition()); 375 SetParticle(aParticle->GetDefinition());
363 376
>> 377
364 // G4cout << "G4PAIPhotModel::SampleFluctuat 378 // G4cout << "G4PAIPhotModel::SampleFluctuations step(mm)= "<< step/mm
365 // << " Eloss(keV)= " << eloss/keV << " in 379 // << " Eloss(keV)= " << eloss/keV << " in "
366 // << matCC->GetMaterial()->GetName() << G4e 380 // << matCC->GetMaterial()->GetName() << G4endl;
>> 381
367 382
368 G4double Tkin = aParticle->GetKineticE 383 G4double Tkin = aParticle->GetKineticEnergy();
369 G4double scaledTkin = Tkin*fRatio; 384 G4double scaledTkin = Tkin*fRatio;
370 385
371 G4double loss = fModelData->SampleAlongStepP 386 G4double loss = fModelData->SampleAlongStepPhotonTransfer(coupleIndex, Tkin,
372 scaledTkin, << 387 scaledTkin,
373 step*fChargeSquare); << 388 step*fChargeSquare);
374 loss += fModelData->SampleAlongStepPlasmonTr << 389 loss += fModelData->SampleAlongStepPlasmonTransfer(coupleIndex, Tkin,
375 << 390 scaledTkin,
>> 391 step*fChargeSquare);
>> 392
376 393
377 // G4cout<<" PAIPhotModel::SampleFluctuatio 394 // G4cout<<" PAIPhotModel::SampleFluctuations loss = "<<loss/keV<<" keV, on step = "
378 // <<step/mm<<" mm"<<G4endl; 395 // <<step/mm<<" mm"<<G4endl;
379 return loss; 396 return loss;
380 397
381 } 398 }
382 399
383 ////////////////////////////////////////////// 400 //////////////////////////////////////////////////////////////////////
384 // 401 //
385 // Returns the statistical estimation of the e 402 // Returns the statistical estimation of the energy loss distribution variance
386 // 403 //
387 404
388 405
389 G4double G4PAIPhotModel::Dispersion(const G4Ma << 406 G4double G4PAIPhotModel::Dispersion( const G4Material* material,
390 const G4Dy << 407 const G4DynamicParticle* aParticle,
391 const G4double tcut, << 408 G4double tmax,
392 const G4double tmax, << 409 G4double step )
393 const G4double step) <<
394 { 410 {
395 G4double particleMass = aParticle->GetMass( 411 G4double particleMass = aParticle->GetMass();
396 G4double electronDensity = material->GetElec 412 G4double electronDensity = material->GetElectronDensity();
397 G4double kineticEnergy = aParticle->GetKinet 413 G4double kineticEnergy = aParticle->GetKineticEnergy();
398 G4double q = aParticle->GetCharge()/eplus; 414 G4double q = aParticle->GetCharge()/eplus;
399 G4double etot = kineticEnergy + particleMass 415 G4double etot = kineticEnergy + particleMass;
400 G4double beta2 = kineticEnergy*(kineticEnerg 416 G4double beta2 = kineticEnergy*(kineticEnergy + 2.0*particleMass)/(etot*etot);
401 G4double siga = (tmax/beta2 - 0.5*tcut) * t << 417 G4double siga = (1.0/beta2 - 0.5) * twopi_mc2_rcl2 * tmax * step
402 * electronDensity * q * q; 418 * electronDensity * q * q;
403 419
404 return siga; 420 return siga;
>> 421 /*
>> 422 G4double loss, sumLoss=0., sumLoss2=0., sigma2, meanLoss=0.;
>> 423 for(G4int i = 0; i < fMeanNumber; i++)
>> 424 {
>> 425 loss = SampleFluctuations(material,aParticle,tmax,step,meanLoss);
>> 426 sumLoss += loss;
>> 427 sumLoss2 += loss*loss;
>> 428 }
>> 429 meanLoss = sumLoss/fMeanNumber;
>> 430 sigma2 = meanLoss*meanLoss + (sumLoss2-2*sumLoss*meanLoss)/fMeanNumber;
>> 431 return sigma2;
>> 432 */
405 } 433 }
406 434
407 ////////////////////////////////////////////// 435 /////////////////////////////////////////////////////////////////////
408 436
409 G4double G4PAIPhotModel::MaxSecondaryEnergy( c 437 G4double G4PAIPhotModel::MaxSecondaryEnergy( const G4ParticleDefinition* p,
410 G4double kinEnergy) 438 G4double kinEnergy)
411 { 439 {
412 SetParticle(p); 440 SetParticle(p);
413 G4double tmax = kinEnergy; 441 G4double tmax = kinEnergy;
414 if(p == fElectron) { tmax *= 0.5; } 442 if(p == fElectron) { tmax *= 0.5; }
415 else if(p != fPositron) { 443 else if(p != fPositron) {
416 G4double ratio= electron_mass_c2/fMass; 444 G4double ratio= electron_mass_c2/fMass;
417 G4double gamma= kinEnergy/fMass + 1.0; 445 G4double gamma= kinEnergy/fMass + 1.0;
418 tmax = 2.0*electron_mass_c2*(gamma*gamma - 446 tmax = 2.0*electron_mass_c2*(gamma*gamma - 1.) /
419 (1. + 2.0*gamma*ratio + rati 447 (1. + 2.0*gamma*ratio + ratio*ratio);
420 } 448 }
421 return tmax; 449 return tmax;
422 } 450 }
423 451
424 ////////////////////////////////////////////// 452 ///////////////////////////////////////////////////////////////
425 453
426 void G4PAIPhotModel::DefineForRegion(const G4R 454 void G4PAIPhotModel::DefineForRegion(const G4Region* r)
427 { 455 {
428 fPAIRegionVector.push_back(r); 456 fPAIRegionVector.push_back(r);
429 } 457 }
430 458
431 // 459 //
432 // 460 //
433 ////////////////////////////////////////////// 461 /////////////////////////////////////////////////
434 462