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