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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 //G4cout << "G4PAIPhotModel::~G4PAIPhotModel() " << this << G4endl;
>> 97 if(IsMaster()) { delete fModelData; fModelData = 0; }
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 }
>> 109
>> 110 if(isInitialised) { return; }
>> 111 isInitialised = true;
>> 112
102 SetParticle(p); 113 SetParticle(p);
103 fParticleChange = GetParticleChangeForLoss() 114 fParticleChange = GetParticleChangeForLoss();
104 115
105 if( IsMaster() ) << 116 if(IsMaster()) {
106 { << 117
107 delete fModelData; << 118 InitialiseElementSelectors(p, cuts);
108 fMaterialCutsCoupleVector.clear(); << 119
109 << 120 if(!fModelData) {
110 G4double tmin = LowEnergyLimit()*fRatio; << 121
111 G4double tmax = HighEnergyLimit()*fRatio; << 122 G4double tmin = LowEnergyLimit()*fRatio;
112 fModelData = new G4PAIPhotData(tmin, tmax, << 123 G4double tmax = HighEnergyLimit()*fRatio;
113 << 124 fModelData = new G4PAIPhotData(tmin, tmax, fVerbose);
>> 125 }
114 // Prepare initialization 126 // Prepare initialization
115 const G4MaterialTable* theMaterialTable = 127 const G4MaterialTable* theMaterialTable = G4Material::GetMaterialTable();
116 size_t numOfMat = G4Material::GetNumberO 128 size_t numOfMat = G4Material::GetNumberOfMaterials();
117 size_t numRegions = fPAIRegionVector.size( 129 size_t numRegions = fPAIRegionVector.size();
118 130
119 // protect for unit tests << 131 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 132 const G4Region* curReg = fPAIRegionVector[iReg];
131 G4Region* reg = const_cast<G4Region*>(cu 133 G4Region* reg = const_cast<G4Region*>(curReg);
132 134
133 for(size_t jMat = 0; jMat < numOfMat; ++ << 135 for(size_t jMat = 0; jMat < numOfMat; ++jMat) {
134 { <<
135 G4Material* mat = (*theMaterialTable)[jMat]; 136 G4Material* mat = (*theMaterialTable)[jMat];
136 const G4MaterialCutsCouple* cutCouple = reg- 137 const G4MaterialCutsCouple* cutCouple = reg->FindCouple(mat);
137 if(nullptr != cutCouple) << 138 //G4cout << "Couple <" << fCutCouple << G4endl;
138 { << 139 if(cutCouple) {
139 if(fVerbose > 1) << 140 /*
140 { <<
141 G4cout << "Reg <" <<curReg->GetName() << 141 G4cout << "Reg <" <<curReg->GetName() << "> mat <"
142 << mat->GetName() << "> fCouple= " << 142 << fMaterial->GetName() << "> fCouple= "
143 << cutCouple << ", idx= " << cutCouple-> << 143 << fCutCouple << " idx= " << fCutCouple->GetIndex()
144 <<" " << p->GetParticleName() << 144 <<" " << p->GetParticleName() <<G4endl;
145 <<", cuts.size() = " << cuts.size() << G << 145 // G4cout << cuts.size() << G4endl;
146 } << 146 */
147 // check if this couple is not already ini 147 // check if this couple is not already initialized
148 <<
149 size_t n = fMaterialCutsCoupleVector.size( 148 size_t n = fMaterialCutsCoupleVector.size();
150 << 149 if(0 < n) {
151 G4bool isnew = true; << 150 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 151 if(cutCouple == fMaterialCutsCoupleVector[i]) {
157 isnew = false; <<
158 break; 152 break;
159 } 153 }
160 } 154 }
161 } 155 }
162 // initialise data banks 156 // initialise data banks
163 if(isnew) { << 157 fMaterialCutsCoupleVector.push_back(cutCouple);
164 fMaterialCutsCoupleVector.push_back(cutC << 158 G4double deltaCutInKinEnergy = cuts[cutCouple->GetIndex()];
165 G4double deltaCutInKinEnergy = cuts[cutC << 159 fModelData->Initialise(cutCouple, deltaCutInKinEnergy, this);
166 fModelData->Initialise(cutCouple, deltaC <<
167 } <<
168 } 160 }
169 } 161 }
170 } 162 }
171 InitialiseElementSelectors(p, cuts); <<
172 } 163 }
173 } 164 }
174 165
175 ////////////////////////////////////////////// 166 /////////////////////////////////////////////////////////////////////////
176 167
177 void G4PAIPhotModel::InitialiseLocal(const G4P 168 void G4PAIPhotModel::InitialiseLocal(const G4ParticleDefinition*,
178 G4VEmModel* masterModel) 169 G4VEmModel* masterModel)
179 { 170 {
180 fModelData = static_cast<G4PAIPhotModel*>(ma 171 fModelData = static_cast<G4PAIPhotModel*>(masterModel)->GetPAIPhotData();
181 fMaterialCutsCoupleVector = static_cast<G4PA << 172 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 } 173 }
192 174
193 ////////////////////////////////////////////// 175 //////////////////////////////////////////////////////////////////////////////
194 176
195 G4double G4PAIPhotModel::ComputeDEDXPerVolume( 177 G4double G4PAIPhotModel::ComputeDEDXPerVolume(const G4Material*,
196 const G4ParticleDefinition* p, 178 const G4ParticleDefinition* p,
197 G4double kineticEnergy, 179 G4double kineticEnergy,
198 G4double cutEnergy) 180 G4double cutEnergy)
199 { 181 {
200 G4int coupleIndex = FindCoupleIndex(CurrentC 182 G4int coupleIndex = FindCoupleIndex(CurrentCouple());
201 if(0 > coupleIndex) { return 0.0; } 183 if(0 > coupleIndex) { return 0.0; }
202 184
203 G4double cut = std::min(MaxSecondaryEnergy(p 185 G4double cut = std::min(MaxSecondaryEnergy(p, kineticEnergy), cutEnergy);
>> 186
204 G4double scaledTkin = kineticEnergy*fRatio; 187 G4double scaledTkin = kineticEnergy*fRatio;
205 G4double dedx = fChargeSquare*fModelData->DE << 188
206 return dedx; << 189 return fChargeSquare*fModelData->DEDXPerVolume(coupleIndex, scaledTkin, cut);
207 } 190 }
208 191
209 ////////////////////////////////////////////// 192 /////////////////////////////////////////////////////////////////////////
210 193
211 G4double G4PAIPhotModel::CrossSectionPerVolume 194 G4double G4PAIPhotModel::CrossSectionPerVolume( const G4Material*,
212 const G4ParticleDefinition* p, 195 const G4ParticleDefinition* p,
213 G4double kineticEnergy, 196 G4double kineticEnergy,
214 G4double cutEnergy, 197 G4double cutEnergy,
215 G4double maxEnergy ) 198 G4double maxEnergy )
216 { 199 {
217 G4int coupleIndex = FindCoupleIndex(CurrentC 200 G4int coupleIndex = FindCoupleIndex(CurrentCouple());
218 if(0 > coupleIndex) { return 0.0; } << 201
>> 202 if(0 > coupleIndex) return 0.0;
219 203
220 G4double tmax = std::min(MaxSecondaryEnergy( 204 G4double tmax = std::min(MaxSecondaryEnergy(p, kineticEnergy), maxEnergy);
221 if(tmax <= cutEnergy) { return 0.0; } << 205
>> 206 if(tmax <= cutEnergy) return 0.0;
222 207
223 G4double scaledTkin = kineticEnergy*fRatio; 208 G4double scaledTkin = kineticEnergy*fRatio;
224 G4double xs = fChargeSquare*fModelData->Cros << 209 G4double xsc = fChargeSquare*fModelData->CrossSectionPerVolume(coupleIndex,
225 scal << 210 scaledTkin,
226 return xs; << 211 cutEnergy, tmax);
>> 212 return xsc;
227 } 213 }
228 214
229 ////////////////////////////////////////////// 215 ///////////////////////////////////////////////////////////////////////////
230 // 216 //
231 // It is analog of PostStepDoIt in terms of se 217 // It is analog of PostStepDoIt in terms of secondary electron.
232 // 218 //
233 219
234 void G4PAIPhotModel::SampleSecondaries(std::ve 220 void G4PAIPhotModel::SampleSecondaries(std::vector<G4DynamicParticle*>* vdp,
235 const G4MaterialCutsCouple* matCC, 221 const G4MaterialCutsCouple* matCC,
236 const G4DynamicParticle* dp, 222 const G4DynamicParticle* dp,
237 G4double tmin, 223 G4double tmin,
238 G4double maxEnergy) 224 G4double maxEnergy)
239 { 225 {
240 G4int coupleIndex = FindCoupleIndex(matCC); 226 G4int coupleIndex = FindCoupleIndex(matCC);
241 if(0 > coupleIndex) { return; } 227 if(0 > coupleIndex) { return; }
242 228
243 SetParticle(dp->GetDefinition()); 229 SetParticle(dp->GetDefinition());
244 230
245 G4double kineticEnergy = dp->GetKineticEnerg 231 G4double kineticEnergy = dp->GetKineticEnergy();
246 232
247 G4double tmax = MaxSecondaryEnergy(fParticle 233 G4double tmax = MaxSecondaryEnergy(fParticle, kineticEnergy);
248 234
249 if( maxEnergy < tmax) tmax = maxEnergy; 235 if( maxEnergy < tmax) tmax = maxEnergy;
250 if( tmin >= tmax) return; 236 if( tmin >= tmax) return;
251 237
252 G4ThreeVector direction = dp->GetMomentumDir 238 G4ThreeVector direction = dp->GetMomentumDirection();
253 G4double scaledTkin = kineticEnergy*fRat 239 G4double scaledTkin = kineticEnergy*fRatio;
254 G4double totalEnergy = kineticEnergy + fM 240 G4double totalEnergy = kineticEnergy + fMass;
255 G4double totalMomentum = sqrt(kineticEnergy 241 G4double totalMomentum = sqrt(kineticEnergy*(totalEnergy + fMass));
256 G4double plRatio = fModelData->GetPla 242 G4double plRatio = fModelData->GetPlasmonRatio(coupleIndex, scaledTkin);
257 243
258 if( G4UniformRand() <= plRatio ) 244 if( G4UniformRand() <= plRatio )
259 { 245 {
260 G4double deltaTkin = fModelData->SamplePos 246 G4double deltaTkin = fModelData->SamplePostStepPlasmonTransfer(coupleIndex, scaledTkin);
261 247
262 // G4cout<<"G4PAIPhotModel::SampleSecondar 248 // G4cout<<"G4PAIPhotModel::SampleSecondaries; dp "<<dp->GetParticleDefinition()->GetParticleName()
263 // <<"; Tkin = "<<kineticEnergy/keV<<" keV 249 // <<"; Tkin = "<<kineticEnergy/keV<<" keV; transfer = "<<deltaTkin/keV<<" keV "<<G4endl;
264 250
265 if( deltaTkin <= 0. && fVerbose > 0) 251 if( deltaTkin <= 0. && fVerbose > 0)
266 { 252 {
267 G4cout<<"G4PAIPhotModel::SampleSecondary << 253 G4cout<<"G4PAIPhotModel::SampleSecondary e- deltaTkin = "<<deltaTkin<<G4endl;
268 } 254 }
269 if( deltaTkin <= 0.) { return; } << 255 if( deltaTkin <= 0.) return;
270 256
271 if( deltaTkin > tmax) { deltaTkin = tmax; << 257 if( deltaTkin > tmax) deltaTkin = tmax;
272 258
273 const G4Element* anElement = SelectTargetA << 259 const G4Element* anElement = SelectRandomAtom(matCC,fParticle,kineticEnergy);
274 << 260 G4int Z = G4lrint(anElement->GetZ());
275 G4int Z = anElement->GetZasInt(); <<
276 261
277 auto deltaRay = new G4DynamicParticle(fEle << 262 G4DynamicParticle* deltaRay = new G4DynamicParticle(fElectron,
278 GetAngularDistribution()->SampleDirectio 263 GetAngularDistribution()->SampleDirection(dp, deltaTkin,
279 Z, matCC->GetMaterial()), 264 Z, matCC->GetMaterial()),
280 deltaTkin); 265 deltaTkin);
281 266
282 // primary change 267 // primary change
283 268
284 kineticEnergy -= deltaTkin; 269 kineticEnergy -= deltaTkin;
285 270
286 if( kineticEnergy <= 0. ) // kill primary 271 if( kineticEnergy <= 0. ) // kill primary as local? energy deposition
287 { 272 {
288 fParticleChange->SetProposedKineticEnerg 273 fParticleChange->SetProposedKineticEnergy(0.0);
289 fParticleChange->ProposeLocalEnergyDepos 274 fParticleChange->ProposeLocalEnergyDeposit(kineticEnergy+deltaTkin);
>> 275 // fParticleChange->ProposeTrackStatus(fStopAndKill);
290 return; 276 return;
291 } 277 }
292 else 278 else
293 { 279 {
294 G4ThreeVector dir = totalMomentum*direct 280 G4ThreeVector dir = totalMomentum*direction - deltaRay->GetMomentum();
295 direction = dir.unit(); 281 direction = dir.unit();
296 fParticleChange->SetProposedKineticEnerg 282 fParticleChange->SetProposedKineticEnergy(kineticEnergy);
297 fParticleChange->SetProposedMomentumDire 283 fParticleChange->SetProposedMomentumDirection(direction);
298 vdp->push_back(deltaRay); 284 vdp->push_back(deltaRay);
299 } 285 }
300 } 286 }
301 else // secondary X-ray CR photon 287 else // secondary X-ray CR photon
302 { 288 {
303 G4double deltaTkin = fModelData->Sampl 289 G4double deltaTkin = fModelData->SamplePostStepPhotonTransfer(coupleIndex, scaledTkin);
304 290
305 // G4cout<<"PAIPhotonModel PhotonPostStep 291 // G4cout<<"PAIPhotonModel PhotonPostStepTransfer = "<<deltaTkin/keV<<" keV"<<G4endl;
306 292
307 if( deltaTkin <= 0. ) 293 if( deltaTkin <= 0. )
308 { 294 {
309 G4cout<<"G4PAIPhotonModel::SampleSeconda 295 G4cout<<"G4PAIPhotonModel::SampleSecondary gamma deltaTkin = "<<deltaTkin<<G4endl;
310 } 296 }
311 if( deltaTkin <= 0.) return; 297 if( deltaTkin <= 0.) return;
312 298
313 if( deltaTkin >= kineticEnergy ) // stop p 299 if( deltaTkin >= kineticEnergy ) // stop primary
314 { 300 {
315 deltaTkin = kineticEnergy; 301 deltaTkin = kineticEnergy;
316 kineticEnergy = 0.0; 302 kineticEnergy = 0.0;
317 } 303 }
318 G4double costheta = 0.; // G4UniformRand() 304 G4double costheta = 0.; // G4UniformRand(); // VG: ??? for start only
319 G4double sintheta = sqrt((1.+costheta)*(1. 305 G4double sintheta = sqrt((1.+costheta)*(1.-costheta));
320 306
321 // direction of the 'Cherenkov' photon 307 // direction of the 'Cherenkov' photon
322 G4double phi = twopi*G4UniformRand(); 308 G4double phi = twopi*G4UniformRand();
323 G4double dirx = sintheta*cos(phi), diry = 309 G4double dirx = sintheta*cos(phi), diry = sintheta*sin(phi), dirz = costheta;
324 310
325 G4ThreeVector deltaDirection(dirx,diry,dir 311 G4ThreeVector deltaDirection(dirx,diry,dirz);
326 deltaDirection.rotateUz(direction); 312 deltaDirection.rotateUz(direction);
327 313
328 if( kineticEnergy > 0.) // primary change 314 if( kineticEnergy > 0.) // primary change
329 { 315 {
330 kineticEnergy -= deltaTkin; 316 kineticEnergy -= deltaTkin;
331 fParticleChange->SetProposedKineticEnerg 317 fParticleChange->SetProposedKineticEnergy(kineticEnergy);
332 } 318 }
333 else // stop primary, but pass X-ray CR 319 else // stop primary, but pass X-ray CR
334 { 320 {
335 // fParticleChange->ProposeLocalEnergyDe 321 // fParticleChange->ProposeLocalEnergyDeposit(deltaTkin);
336 fParticleChange->SetProposedKineticEnerg 322 fParticleChange->SetProposedKineticEnergy(0.0);
337 } 323 }
338 // create G4DynamicParticle object for pho 324 // create G4DynamicParticle object for photon ray
339 325
340 auto photonRay = new G4DynamicParticle; << 326 G4DynamicParticle* photonRay = new G4DynamicParticle;
341 photonRay->SetDefinition( G4Gamma::Gamma() 327 photonRay->SetDefinition( G4Gamma::Gamma() );
342 photonRay->SetKineticEnergy( deltaTkin ); 328 photonRay->SetKineticEnergy( deltaTkin );
343 photonRay->SetMomentumDirection(deltaDirec 329 photonRay->SetMomentumDirection(deltaDirection);
344 330
345 vdp->push_back(photonRay); 331 vdp->push_back(photonRay);
346 } 332 }
347 return; 333 return;
348 } 334 }
349 335
350 ////////////////////////////////////////////// 336 ///////////////////////////////////////////////////////////////////////
351 337
352 G4double G4PAIPhotModel::SampleFluctuations( << 338 G4double G4PAIPhotModel::SampleFluctuations( const G4MaterialCutsCouple* matCC,
353 const G4MaterialCutsC << 339 const G4DynamicParticle* aParticle,
354 const G4DynamicPartic << 340 G4double, G4double step,
355 const G4double, const << 341 G4double eloss)
356 const G4double step, <<
357 { 342 {
358 // return 0.; 343 // return 0.;
359 G4int coupleIndex = FindCoupleIndex(matCC); 344 G4int coupleIndex = FindCoupleIndex(matCC);
360 if(0 > coupleIndex) { return eloss; } 345 if(0 > coupleIndex) { return eloss; }
361 346
362 SetParticle(aParticle->GetDefinition()); 347 SetParticle(aParticle->GetDefinition());
363 348
>> 349
364 // G4cout << "G4PAIPhotModel::SampleFluctuat 350 // G4cout << "G4PAIPhotModel::SampleFluctuations step(mm)= "<< step/mm
365 // << " Eloss(keV)= " << eloss/keV << " in 351 // << " Eloss(keV)= " << eloss/keV << " in "
366 // << matCC->GetMaterial()->GetName() << G4e 352 // << matCC->GetMaterial()->GetName() << G4endl;
>> 353
367 354
368 G4double Tkin = aParticle->GetKineticE 355 G4double Tkin = aParticle->GetKineticEnergy();
369 G4double scaledTkin = Tkin*fRatio; 356 G4double scaledTkin = Tkin*fRatio;
370 357
371 G4double loss = fModelData->SampleAlongStepP 358 G4double loss = fModelData->SampleAlongStepPhotonTransfer(coupleIndex, Tkin,
372 scaledTkin, << 359 scaledTkin,
373 step*fChargeSquare); << 360 step*fChargeSquare);
374 loss += fModelData->SampleAlongStepPlasmonTr << 361 loss += fModelData->SampleAlongStepPlasmonTransfer(coupleIndex, Tkin,
375 << 362 scaledTkin,
>> 363 step*fChargeSquare);
>> 364
376 365
377 // G4cout<<" PAIPhotModel::SampleFluctuatio 366 // G4cout<<" PAIPhotModel::SampleFluctuations loss = "<<loss/keV<<" keV, on step = "
378 // <<step/mm<<" mm"<<G4endl; 367 // <<step/mm<<" mm"<<G4endl;
379 return loss; 368 return loss;
380 369
381 } 370 }
382 371
383 ////////////////////////////////////////////// 372 //////////////////////////////////////////////////////////////////////
384 // 373 //
385 // Returns the statistical estimation of the e 374 // Returns the statistical estimation of the energy loss distribution variance
386 // 375 //
387 376
388 377
389 G4double G4PAIPhotModel::Dispersion(const G4Ma << 378 G4double G4PAIPhotModel::Dispersion( const G4Material* material,
390 const G4Dy << 379 const G4DynamicParticle* aParticle,
391 const G4double tcut, << 380 G4double tmax,
392 const G4double tmax, << 381 G4double step )
393 const G4double step) <<
394 { 382 {
395 G4double particleMass = aParticle->GetMass( 383 G4double particleMass = aParticle->GetMass();
396 G4double electronDensity = material->GetElec 384 G4double electronDensity = material->GetElectronDensity();
397 G4double kineticEnergy = aParticle->GetKinet 385 G4double kineticEnergy = aParticle->GetKineticEnergy();
398 G4double q = aParticle->GetCharge()/eplus; 386 G4double q = aParticle->GetCharge()/eplus;
399 G4double etot = kineticEnergy + particleMass 387 G4double etot = kineticEnergy + particleMass;
400 G4double beta2 = kineticEnergy*(kineticEnerg 388 G4double beta2 = kineticEnergy*(kineticEnergy + 2.0*particleMass)/(etot*etot);
401 G4double siga = (tmax/beta2 - 0.5*tcut) * t << 389 G4double siga = (1.0/beta2 - 0.5) * twopi_mc2_rcl2 * tmax * step
402 * electronDensity * q * q; 390 * electronDensity * q * q;
403 391
404 return siga; 392 return siga;
>> 393 /*
>> 394 G4double loss, sumLoss=0., sumLoss2=0., sigma2, meanLoss=0.;
>> 395 for(G4int i = 0; i < fMeanNumber; i++)
>> 396 {
>> 397 loss = SampleFluctuations(material,aParticle,tmax,step,meanLoss);
>> 398 sumLoss += loss;
>> 399 sumLoss2 += loss*loss;
>> 400 }
>> 401 meanLoss = sumLoss/fMeanNumber;
>> 402 sigma2 = meanLoss*meanLoss + (sumLoss2-2*sumLoss*meanLoss)/fMeanNumber;
>> 403 return sigma2;
>> 404 */
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