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25 // 25 //
26 << 26 // $Id$
>> 27 //
27 #include "G4AdjointBremsstrahlungModel.hh" 28 #include "G4AdjointBremsstrahlungModel.hh"
28 <<
29 #include "G4AdjointCSManager.hh" 29 #include "G4AdjointCSManager.hh"
>> 30
>> 31 #include "G4PhysicalConstants.hh"
>> 32 #include "G4SystemOfUnits.hh"
>> 33
>> 34 #include "G4Integrator.hh"
>> 35 #include "G4TrackStatus.hh"
>> 36 #include "G4ParticleChange.hh"
30 #include "G4AdjointElectron.hh" 37 #include "G4AdjointElectron.hh"
31 #include "G4AdjointGamma.hh" 38 #include "G4AdjointGamma.hh"
32 #include "G4Electron.hh" 39 #include "G4Electron.hh"
33 #include "G4EmModelManager.hh" << 40 #include "G4Timer.hh"
34 #include "G4Gamma.hh" <<
35 #include "G4ParticleChange.hh" <<
36 #include "G4PhysicalConstants.hh" <<
37 #include "G4SeltzerBergerModel.hh" 41 #include "G4SeltzerBergerModel.hh"
38 #include "G4SystemOfUnits.hh" <<
39 #include "G4TrackStatus.hh" <<
40 42
41 ////////////////////////////////////////////// <<
42 G4AdjointBremsstrahlungModel::G4AdjointBremsst <<
43 : G4VEmAdjointModel("AdjointeBremModel") <<
44 { <<
45 fDirectModel = aModel; <<
46 Initialize(); <<
47 } <<
48 43
49 ////////////////////////////////////////////// 44 ////////////////////////////////////////////////////////////////////////////////
50 G4AdjointBremsstrahlungModel::G4AdjointBremsst << 45 //
51 : G4VEmAdjointModel("AdjointeBremModel") << 46 G4AdjointBremsstrahlungModel::G4AdjointBremsstrahlungModel(G4VEmModel* aModel):
52 { << 47 G4VEmAdjointModel("AdjointeBremModel")
53 fDirectModel = new G4SeltzerBergerModel(); << 48 {
54 Initialize(); <<
55 } <<
56 <<
57 ////////////////////////////////////////////// <<
58 void G4AdjointBremsstrahlungModel::Initialize( <<
59 { <<
60 SetUseMatrix(false); 49 SetUseMatrix(false);
61 SetUseMatrixPerElement(false); 50 SetUseMatrixPerElement(false);
>> 51
>> 52 theDirectStdBremModel = aModel;
>> 53 theDirectEMModel=theDirectStdBremModel;
>> 54 theEmModelManagerForFwdModels = new G4EmModelManager();
>> 55 isDirectModelInitialised = false;
>> 56 G4VEmFluctuationModel* f=0;
>> 57 G4Region* r=0;
>> 58 theEmModelManagerForFwdModels->AddEmModel(1, theDirectStdBremModel, f, r);
62 59
63 fEmModelManagerForFwdModels = new G4EmModelM <<
64 fEmModelManagerForFwdModels->AddEmModel(1, f <<
65 SetApplyCutInRange(true); 60 SetApplyCutInRange(true);
>> 61 highKinEnergy= 100.*TeV;
>> 62 lowKinEnergy = 1.0*keV;
66 63
67 fElectron = G4Electron::Electron(); << 64 lastCZ =0.;
68 fGamma = G4Gamma::Gamma(); <<
69 65
70 fAdjEquivDirectPrimPart = G4AdjointElectro << 66
71 fAdjEquivDirectSecondPart = G4AdjointGamma:: << 67 theAdjEquivOfDirectPrimPartDef =G4AdjointElectron::AdjointElectron();
72 fDirectPrimaryPart = fElectron; << 68 theAdjEquivOfDirectSecondPartDef=G4AdjointGamma::AdjointGamma();
73 fSecondPartSameType = false; << 69 theDirectPrimaryPartDef=G4Electron::Electron();
>> 70 second_part_of_same_type=false;
>> 71
>> 72 /*UsePenelopeModel=false;
>> 73 if (UsePenelopeModel) {
>> 74 G4PenelopeBremsstrahlungModel* thePenelopeModel = new G4PenelopeBremsstrahlungModel(G4Electron::Electron(),"PenelopeBrem");
>> 75 theEmModelManagerForFwdModels = new G4EmModelManager();
>> 76 isPenelopeModelInitialised = false;
>> 77 G4VEmFluctuationModel* f=0;
>> 78 G4Region* r=0;
>> 79 theDirectEMModel=thePenelopeModel;
>> 80 theEmModelManagerForFwdModels->AddEmModel(1, thePenelopeModel, f, r);
>> 81 }
>> 82 */
>> 83
74 84
75 fCSManager = G4AdjointCSManager::GetAdjointC << 85
76 } 86 }
>> 87 ////////////////////////////////////////////////////////////////////////////////
>> 88 //
>> 89 G4AdjointBremsstrahlungModel::G4AdjointBremsstrahlungModel():
>> 90 G4VEmAdjointModel("AdjointeBremModel")
>> 91 {
>> 92 SetUseMatrix(false);
>> 93 SetUseMatrixPerElement(false);
>> 94
>> 95 theDirectStdBremModel = new G4SeltzerBergerModel();
>> 96 theDirectEMModel=theDirectStdBremModel;
>> 97 theEmModelManagerForFwdModels = new G4EmModelManager();
>> 98 isDirectModelInitialised = false;
>> 99 G4VEmFluctuationModel* f=0;
>> 100 G4Region* r=0;
>> 101 theEmModelManagerForFwdModels->AddEmModel(1, theDirectStdBremModel, f, r);
>> 102 // theDirectPenelopeBremModel =0;
>> 103 SetApplyCutInRange(true);
>> 104 highKinEnergy= 1.*GeV;
>> 105 lowKinEnergy = 1.0*keV;
>> 106 lastCZ =0.;
>> 107 theAdjEquivOfDirectPrimPartDef =G4AdjointElectron::AdjointElectron();
>> 108 theAdjEquivOfDirectSecondPartDef=G4AdjointGamma::AdjointGamma();
>> 109 theDirectPrimaryPartDef=G4Electron::Electron();
>> 110 second_part_of_same_type=false;
77 111
>> 112 }
78 ////////////////////////////////////////////// 113 ////////////////////////////////////////////////////////////////////////////////
>> 114 //
79 G4AdjointBremsstrahlungModel::~G4AdjointBremss 115 G4AdjointBremsstrahlungModel::~G4AdjointBremsstrahlungModel()
80 { << 116 {if (theDirectStdBremModel) delete theDirectStdBremModel;
81 if(fEmModelManagerForFwdModels) << 117 if (theEmModelManagerForFwdModels) delete theEmModelManagerForFwdModels;
82 delete fEmModelManagerForFwdModels; <<
83 } 118 }
84 119
85 ////////////////////////////////////////////// 120 ////////////////////////////////////////////////////////////////////////////////
86 void G4AdjointBremsstrahlungModel::SampleSecon << 121 //
87 const G4Track& aTrack, G4bool isScatProjToPr << 122 void G4AdjointBremsstrahlungModel::SampleSecondaries(const G4Track& aTrack,
88 G4ParticleChange* fParticleChange) << 123 G4bool IsScatProjToProjCase,
>> 124 G4ParticleChange* fParticleChange)
89 { 125 {
90 if(!fUseMatrix) << 126 if (!UseMatrix) return RapidSampleSecondaries(aTrack,IsScatProjToProjCase,fParticleChange);
91 return RapidSampleSecondaries(aTrack, isSc <<
92 <<
93 const G4DynamicParticle* theAdjointPrimary = <<
94 DefineCurrentMaterial(aTrack.GetMaterialCuts <<
95 <<
96 G4double adjointPrimKinEnergy = theAdjoint <<
97 G4double adjointPrimTotalEnergy = theAdjoint <<
98 127
99 if(adjointPrimKinEnergy > GetHighEnergyLimit << 128 const G4DynamicParticle* theAdjointPrimary =aTrack.GetDynamicParticle();
100 { << 129 DefineCurrentMaterial(aTrack.GetMaterialCutsCouple());
101 return; << 130
102 } << 131
>> 132 G4double adjointPrimKinEnergy = theAdjointPrimary->GetKineticEnergy();
>> 133 G4double adjointPrimTotalEnergy = theAdjointPrimary->GetTotalEnergy();
>> 134
>> 135 if (adjointPrimKinEnergy>HighEnergyLimit*0.999){
>> 136 return;
>> 137 }
>> 138
>> 139 G4double projectileKinEnergy = SampleAdjSecEnergyFromCSMatrix(adjointPrimKinEnergy,
>> 140 IsScatProjToProjCase);
>> 141 //Weight correction
>> 142 //-----------------------
>> 143 CorrectPostStepWeight(fParticleChange,
>> 144 aTrack.GetWeight(),
>> 145 adjointPrimKinEnergy,
>> 146 projectileKinEnergy,
>> 147 IsScatProjToProjCase);
>> 148
>> 149
>> 150 //Kinematic
>> 151 //---------
>> 152 G4double projectileM0 = theAdjEquivOfDirectPrimPartDef->GetPDGMass();
>> 153 G4double projectileTotalEnergy = projectileM0+projectileKinEnergy;
>> 154 G4double projectileP2 = projectileTotalEnergy*projectileTotalEnergy - projectileM0*projectileM0;
>> 155 G4double projectileP = std::sqrt(projectileP2);
>> 156
>> 157
>> 158 //Angle of the gamma direction with the projectile taken from G4eBremsstrahlungModel
>> 159 //------------------------------------------------
>> 160 G4double u;
>> 161 const G4double a1 = 0.625 , a2 = 3.*a1 , d = 27. ;
103 162
104 G4double projectileKinEnergy = << 163 if (9./(9.+d) > G4UniformRand()) u = - std::log(G4UniformRand()*G4UniformRand())/a1;
105 SampleAdjSecEnergyFromCSMatrix(adjointPrim << 164 else u = - std::log(G4UniformRand()*G4UniformRand())/a2;
106 165
107 // Weight correction << 166 G4double theta = u*electron_mass_c2/projectileTotalEnergy;
108 CorrectPostStepWeight(fParticleChange, aTrac <<
109 adjointPrimKinEnergy, <<
110 isScatProjToProj); <<
111 <<
112 // Kinematic <<
113 G4double projectileM0 = fAdjEquivDi <<
114 G4double projectileTotalEnergy = projectileM <<
115 G4double projectileP2 = <<
116 projectileTotalEnergy * projectileTotalEne <<
117 G4double projectileP = std::sqrt(projectileP <<
118 167
119 // Angle of the gamma direction with the pro << 168 G4double sint = std::sin(theta);
120 // G4eBremsstrahlungModel << 169 G4double cost = std::cos(theta);
121 G4double u; << 170
122 if(0.25 > G4UniformRand()) << 171 G4double phi = twopi * G4UniformRand() ;
123 u = -std::log(G4UniformRand() * G4UniformR << 172
124 else << 173 G4ThreeVector projectileMomentum;
125 u = -std::log(G4UniformRand() * G4UniformR << 174 projectileMomentum=G4ThreeVector(std::cos(phi)*sint,std::sin(phi)*sint,cost)*projectileP; //gamma frame
126 << 175 if (IsScatProjToProjCase) {//the adjoint primary is the scattered e-
127 G4double theta = u * electron_mass_c2 / proj << 176 G4ThreeVector gammaMomentum = (projectileTotalEnergy-adjointPrimTotalEnergy)*G4ThreeVector(0.,0.,1.);
128 G4double sint = std::sin(theta); << 177 G4ThreeVector dirProd=projectileMomentum-gammaMomentum;
129 G4double cost = std::cos(theta); << 178 G4double cost1 = std::cos(dirProd.angle(projectileMomentum));
130 << 179 G4double sint1 = std::sqrt(1.-cost1*cost1);
131 G4double phi = twopi * G4UniformRand(); << 180 projectileMomentum=G4ThreeVector(std::cos(phi)*sint1,std::sin(phi)*sint1,cost1)*projectileP;
132 << 181
133 G4ThreeVector projectileMomentum = <<
134 G4ThreeVector(std::cos(phi) * sint, std::s <<
135 projectileP; // gamma frame <<
136 if(isScatProjToProj) <<
137 { // the adjoint primary is the scattered e <<
138 G4ThreeVector gammaMomentum = <<
139 (projectileTotalEnergy - adjointPrimTota <<
140 G4ThreeVector(0., 0., 1.); <<
141 G4ThreeVector dirProd = projectileMomentum <<
142 G4double cost1 = std::cos(dirProd.a <<
143 G4double sint1 = std::sqrt(1. - cos <<
144 projectileMomentum = <<
145 G4ThreeVector(std::cos(phi) * sint1, std <<
146 projectileP; <<
147 } 182 }
148 << 183
149 projectileMomentum.rotateUz(theAdjointPrimar 184 projectileMomentum.rotateUz(theAdjointPrimary->GetMomentumDirection());
150 << 185
151 if(!isScatProjToProj) << 186
152 { // kill the primary and add a secondary << 187
153 fParticleChange->ProposeTrackStatus(fStopA << 188 if (!IsScatProjToProjCase ){ //kill the primary and add a secondary
154 fParticleChange->AddSecondary( << 189 fParticleChange->ProposeTrackStatus(fStopAndKill);
155 new G4DynamicParticle(fAdjEquivDirectPri << 190 fParticleChange->AddSecondary(new G4DynamicParticle(theAdjEquivOfDirectPrimPartDef,projectileMomentum));
156 } << 191 }
157 else << 192 else {
158 { << 193 fParticleChange->ProposeEnergy(projectileKinEnergy);
159 fParticleChange->ProposeEnergy(projectileK << 194 fParticleChange->ProposeMomentumDirection(projectileMomentum.unit());
160 fParticleChange->ProposeMomentumDirection( << 195
161 } << 196 }
162 } << 197 }
163 <<
164 ////////////////////////////////////////////// 198 ////////////////////////////////////////////////////////////////////////////////
165 void G4AdjointBremsstrahlungModel::RapidSample << 199 //
166 const G4Track& aTrack, G4bool isScatProjToPr << 200 void G4AdjointBremsstrahlungModel::RapidSampleSecondaries(const G4Track& aTrack,
167 G4ParticleChange* fParticleChange) << 201 G4bool IsScatProjToProjCase,
168 { << 202 G4ParticleChange* fParticleChange)
169 const G4DynamicParticle* theAdjointPrimary = << 203 {
170 DefineCurrentMaterial(aTrack.GetMaterialCuts << 204
171 << 205 const G4DynamicParticle* theAdjointPrimary =aTrack.GetDynamicParticle();
172 G4double adjointPrimKinEnergy = theAdjoint << 206 DefineCurrentMaterial(aTrack.GetMaterialCutsCouple());
173 G4double adjointPrimTotalEnergy = theAdjoint << 207
>> 208
>> 209 G4double adjointPrimKinEnergy = theAdjointPrimary->GetKineticEnergy();
>> 210 G4double adjointPrimTotalEnergy = theAdjointPrimary->GetTotalEnergy();
>> 211
>> 212 if (adjointPrimKinEnergy>HighEnergyLimit*0.999){
>> 213 return;
>> 214 }
>> 215
>> 216 G4double projectileKinEnergy =0.;
>> 217 G4double gammaEnergy=0.;
>> 218 G4double diffCSUsed=0.;
>> 219 if (!IsScatProjToProjCase){
>> 220 gammaEnergy=adjointPrimKinEnergy;
>> 221 G4double Emax = GetSecondAdjEnergyMaxForProdToProjCase(adjointPrimKinEnergy);
>> 222 G4double Emin= GetSecondAdjEnergyMinForProdToProjCase(adjointPrimKinEnergy);;
>> 223 if (Emin>=Emax) return;
>> 224 projectileKinEnergy=Emin*std::pow(Emax/Emin,G4UniformRand());
>> 225 diffCSUsed=lastCZ/projectileKinEnergy;
>> 226
>> 227 }
>> 228 else { G4double Emax = GetSecondAdjEnergyMaxForScatProjToProjCase(adjointPrimKinEnergy);
>> 229 G4double Emin = GetSecondAdjEnergyMinForScatProjToProjCase(adjointPrimKinEnergy,currentTcutForDirectSecond);
>> 230 if (Emin>=Emax) return;
>> 231 G4double f1=(Emin-adjointPrimKinEnergy)/Emin;
>> 232 G4double f2=(Emax-adjointPrimKinEnergy)/Emax/f1;
>> 233 //G4cout<<"f1 and f2 "<<f1<<'\t'<<f2<<G4endl;
>> 234 projectileKinEnergy=adjointPrimKinEnergy/(1.-f1*std::pow(f2,G4UniformRand()));
>> 235 gammaEnergy=projectileKinEnergy-adjointPrimKinEnergy;
>> 236 diffCSUsed=lastCZ*adjointPrimKinEnergy/projectileKinEnergy/gammaEnergy;
>> 237
>> 238 }
>> 239
>> 240
>> 241
>> 242
>> 243 //Weight correction
>> 244 //-----------------------
>> 245 //First w_corr is set to the ratio between adjoint total CS and fwd total CS
>> 246 G4double w_corr=G4AdjointCSManager::GetAdjointCSManager()->GetPostStepWeightCorrection();
>> 247
>> 248 //Then another correction is needed due to the fact that a biaised differential CS has been used rather than the one consistent with the direct model
>> 249 //Here we consider the true diffCS as the one obtained by the numericla differentiation over Tcut of the direct CS, corrected by the Migdal term.
>> 250 //Basically any other differential CS diffCS could be used here (example Penelope).
>> 251
>> 252 G4double diffCS = DiffCrossSectionPerVolumePrimToSecond(currentMaterial, projectileKinEnergy, gammaEnergy);
>> 253 w_corr*=diffCS/diffCSUsed;
>> 254
>> 255 G4double new_weight = aTrack.GetWeight()*w_corr;
>> 256 fParticleChange->SetParentWeightByProcess(false);
>> 257 fParticleChange->SetSecondaryWeightByProcess(false);
>> 258 fParticleChange->ProposeParentWeight(new_weight);
>> 259
>> 260 //Kinematic
>> 261 //---------
>> 262 G4double projectileM0 = theAdjEquivOfDirectPrimPartDef->GetPDGMass();
>> 263 G4double projectileTotalEnergy = projectileM0+projectileKinEnergy;
>> 264 G4double projectileP2 = projectileTotalEnergy*projectileTotalEnergy - projectileM0*projectileM0;
>> 265 G4double projectileP = std::sqrt(projectileP2);
>> 266
>> 267
>> 268 //Angle of the gamma direction with the projectile taken from G4eBremsstrahlungModel
>> 269 //------------------------------------------------
>> 270 G4double u;
>> 271 const G4double a1 = 0.625 , a2 = 3.*a1 , d = 27. ;
174 272
175 if(adjointPrimKinEnergy > GetHighEnergyLimit << 273 if (9./(9.+d) > G4UniformRand()) u = - std::log(G4UniformRand()*G4UniformRand())/a1;
176 { << 274 else u = - std::log(G4UniformRand()*G4UniformRand())/a2;
177 return; <<
178 } <<
179 275
180 G4double projectileKinEnergy = 0.; << 276 G4double theta = u*electron_mass_c2/projectileTotalEnergy;
181 G4double gammaEnergy = 0.; <<
182 G4double diffCSUsed = 0.; <<
183 if(!isScatProjToProj) <<
184 { <<
185 gammaEnergy = adjointPrimKinEnergy; <<
186 G4double Emax = GetSecondAdjEnergyMaxForPr <<
187 G4double Emin = GetSecondAdjEnergyMinForPr <<
188 if(Emin >= Emax) <<
189 return; <<
190 projectileKinEnergy = Emin * std::pow(Emax <<
191 diffCSUsed = fCsBiasingFactor * f <<
192 } <<
193 else <<
194 { <<
195 G4double Emax = <<
196 GetSecondAdjEnergyMaxForScatProjToProj(a <<
197 G4double Emin = <<
198 GetSecondAdjEnergyMinForScatProjToProj(a <<
199 if(Emin >= Emax) <<
200 return; <<
201 G4double f1 = (Emin - adjointPrimKinEnergy <<
202 G4double f2 = (Emax - adjointPrimKinEnergy <<
203 projectileKinEnergy = <<
204 adjointPrimKinEnergy / (1. - f1 * std::p <<
205 gammaEnergy = projectileKinEnergy - adjoin <<
206 diffCSUsed = <<
207 fLastCZ * adjointPrimKinEnergy / project <<
208 } <<
209 277
210 // Weight correction: << 278 G4double sint = std::sin(theta);
211 // First w_corr is set to the ratio between << 279 G4double cost = std::cos(theta);
212 // if this has to be done in the model. << 280
213 // For the case of forced interaction this w << 281 G4double phi = twopi * G4UniformRand() ;
214 // the forced interaction. It is important << 282
215 // creation of the secondary << 283 G4ThreeVector projectileMomentum;
216 G4double w_corr = fOutsideWeightFactor; << 284 projectileMomentum=G4ThreeVector(std::cos(phi)*sint,std::sin(phi)*sint,cost)*projectileP; //gamma frame
217 if(fInModelWeightCorr) << 285 if (IsScatProjToProjCase) {//the adjoint primary is the scattered e-
218 { << 286 G4ThreeVector gammaMomentum = (projectileTotalEnergy-adjointPrimTotalEnergy)*G4ThreeVector(0.,0.,1.);
219 w_corr = fCSManager->GetPostStepWeightCorr << 287 G4ThreeVector dirProd=projectileMomentum-gammaMomentum;
>> 288 G4double cost1 = std::cos(dirProd.angle(projectileMomentum));
>> 289 G4double sint1 = std::sqrt(1.-cost1*cost1);
>> 290 projectileMomentum=G4ThreeVector(std::cos(phi)*sint1,std::sin(phi)*sint1,cost1)*projectileP;
>> 291
220 } 292 }
221 << 293
222 // Then another correction is needed due to <<
223 // differential CS has been used rather than <<
224 // direct model Here we consider the true di <<
225 // numerical differentiation over Tcut of th <<
226 // Migdal term. Basically any other differen <<
227 // (example Penelope). <<
228 G4double diffCS = DiffCrossSectionPerVolumeP <<
229 fCurrentMaterial, projectileKinEnergy, gam <<
230 w_corr *= diffCS / diffCSUsed; <<
231 <<
232 G4double new_weight = aTrack.GetWeight() * w <<
233 fParticleChange->SetParentWeightByProcess(fa <<
234 fParticleChange->SetSecondaryWeightByProcess <<
235 fParticleChange->ProposeParentWeight(new_wei <<
236 <<
237 // Kinematic <<
238 G4double projectileM0 = fAdjEquivDi <<
239 G4double projectileTotalEnergy = projectileM <<
240 G4double projectileP2 = <<
241 projectileTotalEnergy * projectileTotalEne <<
242 G4double projectileP = std::sqrt(projectileP <<
243 <<
244 // Use the angular model of the forward mode <<
245 // Dummy dynamic particle to use the model <<
246 G4DynamicParticle* aDynPart = <<
247 new G4DynamicParticle(fElectron, G4ThreeVe <<
248 <<
249 // Get the element from the direct model <<
250 const G4Element* elm = fDirectModel->SelectR <<
251 fCurrentCouple, fElectron, projectileKinEn <<
252 G4int Z = elm->GetZasInt(); <<
253 G4double energy = aDynPart->GetTotalEnergy() <<
254 G4ThreeVector projectileMomentum = <<
255 fDirectModel->GetAngularDistribution()->Sa <<
256 fC <<
257 G4double phi = projectileMomentum.getPhi(); <<
258 <<
259 if(isScatProjToProj) <<
260 { // the adjoint primary is the scattered e <<
261 G4ThreeVector gammaMomentum = <<
262 (projectileTotalEnergy - adjointPrimTota <<
263 G4ThreeVector(0., 0., 1.); <<
264 G4ThreeVector dirProd = projectileMomentum <<
265 G4double cost1 = std::cos(dirProd.a <<
266 G4double sint1 = std::sqrt(1. - cos <<
267 projectileMomentum = <<
268 G4ThreeVector(std::cos(phi) * sint1, std <<
269 projectileP; <<
270 } <<
271 <<
272 projectileMomentum.rotateUz(theAdjointPrimar 294 projectileMomentum.rotateUz(theAdjointPrimary->GetMomentumDirection());
273 << 295
274 if(!isScatProjToProj) << 296
275 { // kill the primary and add a secondary << 297
276 fParticleChange->ProposeTrackStatus(fStopA << 298 if (!IsScatProjToProjCase ){ //kill the primary and add a secondary
277 fParticleChange->AddSecondary( << 299 fParticleChange->ProposeTrackStatus(fStopAndKill);
278 new G4DynamicParticle(fAdjEquivDirectPri << 300 fParticleChange->AddSecondary(new G4DynamicParticle(theAdjEquivOfDirectPrimPartDef,projectileMomentum));
279 } << 301 }
280 else << 302 else {
281 { << 303 fParticleChange->ProposeEnergy(projectileKinEnergy);
282 fParticleChange->ProposeEnergy(projectileK << 304 fParticleChange->ProposeMomentumDirection(projectileMomentum.unit());
283 fParticleChange->ProposeMomentumDirection( << 305
284 } << 306 }
285 } << 307 }
>> 308 ////////////////////////////////////////////////////////////////////////////////
>> 309 //
>> 310 G4double G4AdjointBremsstrahlungModel::DiffCrossSectionPerVolumePrimToSecond(const G4Material* aMaterial,
>> 311 G4double kinEnergyProj, // kinetic energy of the primary particle before the interaction
>> 312 G4double kinEnergyProd // kinetic energy of the secondary particle
>> 313 )
>> 314 {if (!isDirectModelInitialised) {
>> 315 theEmModelManagerForFwdModels->Initialise(G4Electron::Electron(),G4Gamma::Gamma(),1.,0);
>> 316 isDirectModelInitialised =true;
>> 317 }
>> 318
>> 319 return DiffCrossSectionPerVolumePrimToSecondApproximated2(aMaterial,
>> 320 kinEnergyProj,
>> 321 kinEnergyProd);
>> 322 /*return G4VEmAdjointModel::DiffCrossSectionPerVolumePrimToSecond(aMaterial,
>> 323 kinEnergyProj,
>> 324 kinEnergyProd);*/
>> 325 }
286 326
287 ////////////////////////////////////////////// 327 ////////////////////////////////////////////////////////////////////////////////
288 G4double G4AdjointBremsstrahlungModel::DiffCro << 328 //
289 const G4Material* aMaterial, << 329 G4double G4AdjointBremsstrahlungModel::DiffCrossSectionPerVolumePrimToSecondApproximated1(
290 G4double kinEnergyProj, // kin energy of pr << 330 const G4Material* aMaterial,
291 G4double kinEnergyProd // kinetic energy o << 331 G4double kinEnergyProj, // kinetic energy of the primary particle before the interaction
292 ) << 332 G4double kinEnergyProd // kinetic energy of the secondary particle
>> 333 )
293 { 334 {
294 if(!fIsDirectModelInitialised) << 335 G4double dCrossEprod=0.;
295 { << 336 G4double Emax_proj = GetSecondAdjEnergyMaxForProdToProjCase(kinEnergyProd);
296 fEmModelManagerForFwdModels->Initialise(fE << 337 G4double Emin_proj = GetSecondAdjEnergyMinForProdToProjCase(kinEnergyProd);
297 fIsDirectModelInitialised = true; << 338
298 } << 339
299 return G4VEmAdjointModel::DiffCrossSectionPe << 340 //In this approximation we consider that the secondary gammas are sampled with 1/Egamma energy distribution
300 aMaterial, kinEnergyProj, kinEnergyProd); << 341 //This is what is applied in the discrete standard model before the rejection test that make a correction
>> 342 //The application of the same rejection function is not possible here.
>> 343 //The differentiation of the CS over Ecut does not produce neither a good differential CS. That is due to the
>> 344 // fact that in the discrete model the differential CS and the integrated CS are both fitted but separatly and
>> 345 // therefore do not allow a correct numerical differentiation of the integrated CS to get the differential one.
>> 346 // In the future we plan to use the brem secondary spectra from the G4Penelope implementation
>> 347
>> 348 if (kinEnergyProj>Emin_proj && kinEnergyProj<=Emax_proj){
>> 349 G4double sigma=theDirectEMModel->CrossSectionPerVolume(aMaterial,theDirectPrimaryPartDef,kinEnergyProj,1.*keV);
>> 350 dCrossEprod=sigma/kinEnergyProd/std::log(kinEnergyProj/keV);
>> 351 }
>> 352 return dCrossEprod;
>> 353
301 } 354 }
302 355
303 ////////////////////////////////////////////// 356 ////////////////////////////////////////////////////////////////////////////////
304 G4double G4AdjointBremsstrahlungModel::Adjoint << 357 //
305 const G4MaterialCutsCouple* aCouple, G4doubl << 358 G4double G4AdjointBremsstrahlungModel::DiffCrossSectionPerVolumePrimToSecondApproximated2(
306 G4bool isScatProjToProj) << 359 const G4Material* material,
>> 360 G4double kinEnergyProj, // kinetic energy of the primary particle before the interaction
>> 361 G4double kinEnergyProd // kinetic energy of the secondary particle
>> 362 )
307 { 363 {
308 static constexpr G4double maxEnergy = 100. * << 364 //In this approximation we derive the direct cross section over Tcut=gamma energy, en after apply the Migdla correction factor
309 // 2.78.. == std::exp(1.) << 365 //used in the direct model
310 if(!fIsDirectModelInitialised) << 366
311 { << 367 G4double dCrossEprod=0.;
312 fEmModelManagerForFwdModels->Initialise(fE << 368
313 fIsDirectModelInitialised = true; << 369 const G4ElementVector* theElementVector = material->GetElementVector();
>> 370 const double* theAtomNumDensityVector = material->GetAtomicNumDensityVector();
>> 371 G4double dum=0.;
>> 372 G4double E1=kinEnergyProd,E2=kinEnergyProd*1.001;
>> 373 G4double dE=E2-E1;
>> 374 for (size_t i=0; i<material->GetNumberOfElements(); i++) {
>> 375 G4double C1=theDirectEMModel->ComputeCrossSectionPerAtom(theDirectPrimaryPartDef,kinEnergyProj,(*theElementVector)[i]->GetZ(),dum ,E1);
>> 376 G4double C2=theDirectEMModel->ComputeCrossSectionPerAtom(theDirectPrimaryPartDef,kinEnergyProj,(*theElementVector)[i]->GetZ(),dum,E2);
>> 377 dCrossEprod += theAtomNumDensityVector[i] * (C1-C2)/dE;
>> 378
>> 379 }
>> 380
>> 381 //Now the Migdal correction
>> 382 /*
>> 383 G4double totalEnergy = kinEnergyProj+electron_mass_c2 ;
>> 384 G4double kp2 = MigdalConstant*totalEnergy*totalEnergy
>> 385 *(material->GetElectronDensity());
>> 386
>> 387
>> 388 G4double MigdalFactor = 1./(1.+kp2/(kinEnergyProd*kinEnergyProd)); // its seems that the factor used in the CS compuation i the direct
>> 389 //model is different than the one used in the secondary sampling by a
>> 390 //factor (1.+kp2) To be checked!
>> 391
>> 392 dCrossEprod*=MigdalFactor;
>> 393 */
>> 394 return dCrossEprod;
>> 395
>> 396 }
>> 397 ////////////////////////////////////////////////////////////////////////////////
>> 398 //
>> 399 G4double G4AdjointBremsstrahlungModel::AdjointCrossSection(const G4MaterialCutsCouple* aCouple,
>> 400 G4double primEnergy,
>> 401 G4bool IsScatProjToProjCase)
>> 402 { if (!isDirectModelInitialised) {
>> 403 theEmModelManagerForFwdModels->Initialise(G4Electron::Electron(),G4Gamma::Gamma(),1.,0);
>> 404 isDirectModelInitialised =true;
314 } 405 }
315 if(fUseMatrix) << 406 if (UseMatrix) return G4VEmAdjointModel::AdjointCrossSection(aCouple,primEnergy,IsScatProjToProjCase);
316 return G4VEmAdjointModel::AdjointCrossSect <<
317 <<
318 DefineCurrentMaterial(aCouple); 407 DefineCurrentMaterial(aCouple);
319 G4double Cross = 0.; << 408 G4double Cross=0.;
320 // this gives the constant above << 409 lastCZ=theDirectEMModel->CrossSectionPerVolume(aCouple->GetMaterial(),theDirectPrimaryPartDef,100.*MeV,100.*MeV/std::exp(1.));//this give the constant above
321 fLastCZ = fDirectModel->CrossSectionPerVolum << 410
322 aCouple->GetMaterial(), fDirectPrimaryPart << 411 if (!IsScatProjToProjCase ){
323 << 412 G4double Emax_proj = GetSecondAdjEnergyMaxForProdToProjCase(primEnergy);
324 if(!isScatProjToProj) << 413 G4double Emin_proj = GetSecondAdjEnergyMinForProdToProjCase(primEnergy);
325 { << 414 if (Emax_proj>Emin_proj && primEnergy > currentTcutForDirectSecond) Cross= lastCZ*std::log(Emax_proj/Emin_proj);
326 G4double Emax_proj = GetSecondAdjEnergyMax << 415 }
327 G4double Emin_proj = GetSecondAdjEnergyMin << 416 else {
328 if(Emax_proj > Emin_proj && primEnergy > f << 417 G4double Emax_proj = GetSecondAdjEnergyMaxForScatProjToProjCase(primEnergy);
329 Cross = fCsBiasingFactor * fLastCZ * std << 418 G4double Emin_proj = GetSecondAdjEnergyMinForScatProjToProjCase(primEnergy,currentTcutForDirectSecond);
330 } << 419 if (Emax_proj>Emin_proj) Cross= lastCZ*std::log((Emax_proj-primEnergy)*Emin_proj/Emax_proj/(Emin_proj-primEnergy));
331 else << 420
332 { << 421 }
333 G4double Emax_proj = GetSecondAdjEnergyMax << 422 return Cross;
334 G4double Emin_proj = << 423 }
335 GetSecondAdjEnergyMinForScatProjToProj(p << 424
336 if(Emax_proj > Emin_proj) << 425 G4double G4AdjointBremsstrahlungModel::GetAdjointCrossSection(const G4MaterialCutsCouple* aCouple,
337 Cross = fLastCZ * std::log((Emax_proj - << 426 G4double primEnergy,
338 Emax_proj / ( << 427 G4bool IsScatProjToProjCase)
339 } << 428 {
340 return Cross; << 429 return AdjointCrossSection(aCouple, primEnergy,IsScatProjToProjCase);
>> 430 lastCZ=theDirectEMModel->CrossSectionPerVolume(aCouple->GetMaterial(),theDirectPrimaryPartDef,100.*MeV,100.*MeV/std::exp(1.));//this give the constant above
>> 431 return G4VEmAdjointModel::GetAdjointCrossSection(aCouple, primEnergy,IsScatProjToProjCase);
>> 432
341 } 433 }
>> 434
>> 435
>> 436
342 437