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