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