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