| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer 3 // * License and Disclaimer *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided 6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/ 8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. 9 // * include a list of copyright holders. *
10 // * 10 // * *
11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. *
17 // * 17 // * *
18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. *
24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 << 26 // $Id: G4AdjointBremsstrahlungModel.cc,v 1.6 2010-11-11 11:51:56 ldesorgh Exp $
>> 27 // GEANT4 tag $Name: geant4-09-04-patch-01 $
>> 28 //
27 #include "G4AdjointBremsstrahlungModel.hh" 29 #include "G4AdjointBremsstrahlungModel.hh"
28 <<
29 #include "G4AdjointCSManager.hh" 30 #include "G4AdjointCSManager.hh"
>> 31 #include "G4Integrator.hh"
>> 32 #include "G4TrackStatus.hh"
>> 33 #include "G4ParticleChange.hh"
30 #include "G4AdjointElectron.hh" 34 #include "G4AdjointElectron.hh"
31 #include "G4AdjointGamma.hh" 35 #include "G4AdjointGamma.hh"
32 #include "G4Electron.hh" 36 #include "G4Electron.hh"
33 #include "G4EmModelManager.hh" <<
34 #include "G4Gamma.hh" <<
35 #include "G4ParticleChange.hh" <<
36 #include "G4PhysicalConstants.hh" <<
37 #include "G4SeltzerBergerModel.hh" <<
38 #include "G4SystemOfUnits.hh" <<
39 #include "G4TrackStatus.hh" <<
40 37
41 ////////////////////////////////////////////// << 38 #include "G4Timer.hh"
42 G4AdjointBremsstrahlungModel::G4AdjointBremsst << 39 //#include "G4PenelopeBremsstrahlungModel.hh"
43 : G4VEmAdjointModel("AdjointeBremModel") <<
44 { <<
45 fDirectModel = aModel; <<
46 Initialize(); <<
47 } <<
48 40
49 ////////////////////////////////////////////// <<
50 G4AdjointBremsstrahlungModel::G4AdjointBremsst <<
51 : G4VEmAdjointModel("AdjointeBremModel") <<
52 { <<
53 fDirectModel = new G4SeltzerBergerModel(); <<
54 Initialize(); <<
55 } <<
56 41
57 ////////////////////////////////////////////// 42 ////////////////////////////////////////////////////////////////////////////////
58 void G4AdjointBremsstrahlungModel::Initialize( << 43 //
59 { << 44 G4AdjointBremsstrahlungModel::G4AdjointBremsstrahlungModel():
>> 45 G4VEmAdjointModel("AdjointeBremModel"),
>> 46 MigdalConstant(classic_electr_radius*electron_Compton_length*electron_Compton_length*4.0*pi)
>> 47 {
60 SetUseMatrix(false); 48 SetUseMatrix(false);
61 SetUseMatrixPerElement(false); 49 SetUseMatrixPerElement(false);
62 << 50
63 fEmModelManagerForFwdModels = new G4EmModelM << 51 theDirectStdBremModel = new G4eBremsstrahlungModel(G4Electron::Electron(),"TheDirecteBremModel");
64 fEmModelManagerForFwdModels->AddEmModel(1, f << 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);
>> 58 // theDirectPenelopeBremModel =0;
>> 59
65 SetApplyCutInRange(true); 60 SetApplyCutInRange(true);
>> 61 highKinEnergy= 100.*TeV;
>> 62 lowKinEnergy = 1.0*keV;
>> 63 theTimer =new G4Timer();
>> 64
>> 65 theAdjEquivOfDirectPrimPartDef =G4AdjointElectron::AdjointElectron();
>> 66 theAdjEquivOfDirectSecondPartDef=G4AdjointGamma::AdjointGamma();
>> 67 theDirectPrimaryPartDef=G4Electron::Electron();
>> 68 second_part_of_same_type=false;
>> 69
>> 70 /*UsePenelopeModel=false;
>> 71 if (UsePenelopeModel) {
>> 72 G4PenelopeBremsstrahlungModel* thePenelopeModel = new G4PenelopeBremsstrahlungModel(G4Electron::Electron(),"PenelopeBrem");
>> 73 theEmModelManagerForFwdModels = new G4EmModelManager();
>> 74 isPenelopeModelInitialised = false;
>> 75 G4VEmFluctuationModel* f=0;
>> 76 G4Region* r=0;
>> 77 theDirectEMModel=thePenelopeModel;
>> 78 theEmModelManagerForFwdModels->AddEmModel(1, thePenelopeModel, f, r);
>> 79 }
>> 80 */
>> 81
66 82
67 fElectron = G4Electron::Electron(); << 83
68 fGamma = G4Gamma::Gamma(); <<
69 <<
70 fAdjEquivDirectPrimPart = G4AdjointElectro <<
71 fAdjEquivDirectSecondPart = G4AdjointGamma:: <<
72 fDirectPrimaryPart = fElectron; <<
73 fSecondPartSameType = false; <<
74 <<
75 fCSManager = G4AdjointCSManager::GetAdjointC <<
76 } <<
77 <<
78 ////////////////////////////////////////////// <<
79 G4AdjointBremsstrahlungModel::~G4AdjointBremss <<
80 { <<
81 if(fEmModelManagerForFwdModels) <<
82 delete fEmModelManagerForFwdModels; <<
83 } 84 }
84 85
85 ////////////////////////////////////////////// 86 ////////////////////////////////////////////////////////////////////////////////
86 void G4AdjointBremsstrahlungModel::SampleSecon << 87 //
87 const G4Track& aTrack, G4bool isScatProjToPr << 88 void G4AdjointBremsstrahlungModel::SampleSecondaries(const G4Track& aTrack,
88 G4ParticleChange* fParticleChange) << 89 G4bool IsScatProjToProjCase,
>> 90 G4ParticleChange* fParticleChange)
89 { 91 {
90 if(!fUseMatrix) << 92 if (!UseMatrix) return RapidSampleSecondaries(aTrack,IsScatProjToProjCase,fParticleChange);
91 return RapidSampleSecondaries(aTrack, isSc <<
92 <<
93 const G4DynamicParticle* theAdjointPrimary = <<
94 DefineCurrentMaterial(aTrack.GetMaterialCuts <<
95 93
96 G4double adjointPrimKinEnergy = theAdjoint << 94 const G4DynamicParticle* theAdjointPrimary =aTrack.GetDynamicParticle();
97 G4double adjointPrimTotalEnergy = theAdjoint << 95 DefineCurrentMaterial(aTrack.GetMaterialCutsCouple());
98 << 96
99 if(adjointPrimKinEnergy > GetHighEnergyLimit << 97
100 { << 98 G4double adjointPrimKinEnergy = theAdjointPrimary->GetKineticEnergy();
101 return; << 99 G4double adjointPrimTotalEnergy = theAdjointPrimary->GetTotalEnergy();
102 } << 100
>> 101 if (adjointPrimKinEnergy>HighEnergyLimit*0.999){
>> 102 return;
>> 103 }
>> 104
>> 105 G4double projectileKinEnergy = SampleAdjSecEnergyFromCSMatrix(adjointPrimKinEnergy,
>> 106 IsScatProjToProjCase);
>> 107 //Weight correction
>> 108 //-----------------------
>> 109 CorrectPostStepWeight(fParticleChange,
>> 110 aTrack.GetWeight(),
>> 111 adjointPrimKinEnergy,
>> 112 projectileKinEnergy,
>> 113 IsScatProjToProjCase);
>> 114
>> 115
>> 116 //Kinematic
>> 117 //---------
>> 118 G4double projectileM0 = theAdjEquivOfDirectPrimPartDef->GetPDGMass();
>> 119 G4double projectileTotalEnergy = projectileM0+projectileKinEnergy;
>> 120 G4double projectileP2 = projectileTotalEnergy*projectileTotalEnergy - projectileM0*projectileM0;
>> 121 G4double projectileP = std::sqrt(projectileP2);
>> 122
>> 123
>> 124 //Angle of the gamma direction with the projectile taken from G4eBremsstrahlungModel
>> 125 //------------------------------------------------
>> 126 G4double u;
>> 127 const G4double a1 = 0.625 , a2 = 3.*a1 , d = 27. ;
103 128
104 G4double projectileKinEnergy = << 129 if (9./(9.+d) > G4UniformRand()) u = - std::log(G4UniformRand()*G4UniformRand())/a1;
105 SampleAdjSecEnergyFromCSMatrix(adjointPrim << 130 else u = - std::log(G4UniformRand()*G4UniformRand())/a2;
106 131
107 // Weight correction << 132 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 <<
118 133
119 // Angle of the gamma direction with the pro << 134 G4double sint = std::sin(theta);
120 // G4eBremsstrahlungModel << 135 G4double cost = std::cos(theta);
121 G4double u; << 136
122 if(0.25 > G4UniformRand()) << 137 G4double phi = twopi * G4UniformRand() ;
123 u = -std::log(G4UniformRand() * G4UniformR << 138
124 else << 139 G4ThreeVector projectileMomentum;
125 u = -std::log(G4UniformRand() * G4UniformR << 140 projectileMomentum=G4ThreeVector(std::cos(phi)*sint,std::sin(phi)*sint,cost)*projectileP; //gamma frame
126 << 141 if (IsScatProjToProjCase) {//the adjoint primary is the scattered e-
127 G4double theta = u * electron_mass_c2 / proj << 142 G4ThreeVector gammaMomentum = (projectileTotalEnergy-adjointPrimTotalEnergy)*G4ThreeVector(0.,0.,1.);
128 G4double sint = std::sin(theta); << 143 G4ThreeVector dirProd=projectileMomentum-gammaMomentum;
129 G4double cost = std::cos(theta); << 144 G4double cost1 = std::cos(dirProd.angle(projectileMomentum));
130 << 145 G4double sint1 = std::sqrt(1.-cost1*cost1);
131 G4double phi = twopi * G4UniformRand(); << 146 projectileMomentum=G4ThreeVector(std::cos(phi)*sint1,std::sin(phi)*sint1,cost1)*projectileP;
132 << 147
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 } 148 }
148 << 149
149 projectileMomentum.rotateUz(theAdjointPrimar 150 projectileMomentum.rotateUz(theAdjointPrimary->GetMomentumDirection());
150 << 151
151 if(!isScatProjToProj) << 152
152 { // kill the primary and add a secondary << 153
153 fParticleChange->ProposeTrackStatus(fStopA << 154 if (!IsScatProjToProjCase ){ //kill the primary and add a secondary
154 fParticleChange->AddSecondary( << 155 fParticleChange->ProposeTrackStatus(fStopAndKill);
155 new G4DynamicParticle(fAdjEquivDirectPri << 156 fParticleChange->AddSecondary(new G4DynamicParticle(theAdjEquivOfDirectPrimPartDef,projectileMomentum));
156 } << 157 }
157 else << 158 else {
158 { << 159 fParticleChange->ProposeEnergy(projectileKinEnergy);
159 fParticleChange->ProposeEnergy(projectileK << 160 fParticleChange->ProposeMomentumDirection(projectileMomentum.unit());
160 fParticleChange->ProposeMomentumDirection( << 161
161 } << 162 }
162 } << 163 }
163 <<
164 ////////////////////////////////////////////// 164 ////////////////////////////////////////////////////////////////////////////////
165 void G4AdjointBremsstrahlungModel::RapidSample << 165 //
166 const G4Track& aTrack, G4bool isScatProjToPr << 166 void G4AdjointBremsstrahlungModel::RapidSampleSecondaries(const G4Track& aTrack,
167 G4ParticleChange* fParticleChange) << 167 G4bool IsScatProjToProjCase,
168 { << 168 G4ParticleChange* fParticleChange)
169 const G4DynamicParticle* theAdjointPrimary = << 169 {
170 DefineCurrentMaterial(aTrack.GetMaterialCuts << 170
171 << 171 const G4DynamicParticle* theAdjointPrimary =aTrack.GetDynamicParticle();
172 G4double adjointPrimKinEnergy = theAdjoint << 172 DefineCurrentMaterial(aTrack.GetMaterialCutsCouple());
173 G4double adjointPrimTotalEnergy = theAdjoint << 173
>> 174
>> 175 G4double adjointPrimKinEnergy = theAdjointPrimary->GetKineticEnergy();
>> 176 G4double adjointPrimTotalEnergy = theAdjointPrimary->GetTotalEnergy();
>> 177
>> 178 if (adjointPrimKinEnergy>HighEnergyLimit*0.999){
>> 179 return;
>> 180 }
>> 181
>> 182 G4double projectileKinEnergy =0.;
>> 183 G4double gammaEnergy=0.;
>> 184 G4double diffCSUsed=0.;
>> 185 if (!IsScatProjToProjCase){
>> 186 gammaEnergy=adjointPrimKinEnergy;
>> 187 G4double Emax = GetSecondAdjEnergyMaxForProdToProjCase(adjointPrimKinEnergy);
>> 188 G4double Emin= GetSecondAdjEnergyMinForProdToProjCase(adjointPrimKinEnergy);;
>> 189 if (Emin>=Emax) return;
>> 190 projectileKinEnergy=Emin*std::pow(Emax/Emin,G4UniformRand());
>> 191 diffCSUsed=lastCZ/projectileKinEnergy;
>> 192
>> 193 }
>> 194 else { G4double Emax = GetSecondAdjEnergyMaxForScatProjToProjCase(adjointPrimKinEnergy);
>> 195 G4double Emin = GetSecondAdjEnergyMinForScatProjToProjCase(adjointPrimKinEnergy,currentTcutForDirectSecond);
>> 196 if (Emin>=Emax) return;
>> 197 G4double f1=(Emin-adjointPrimKinEnergy)/Emin;
>> 198 G4double f2=(Emax-adjointPrimKinEnergy)/Emax/f1;
>> 199 //G4cout<<"f1 and f2 "<<f1<<'\t'<<f2<<G4endl;
>> 200 projectileKinEnergy=adjointPrimKinEnergy/(1.-f1*std::pow(f2,G4UniformRand()));
>> 201 gammaEnergy=projectileKinEnergy-adjointPrimKinEnergy;
>> 202 diffCSUsed=lastCZ*adjointPrimKinEnergy/projectileKinEnergy/gammaEnergy;
>> 203
>> 204 }
>> 205
>> 206
>> 207
>> 208
>> 209 //Weight correction
>> 210 //-----------------------
>> 211 //First w_corr is set to the ratio between adjoint total CS and fwd total CS
>> 212 G4double w_corr=G4AdjointCSManager::GetAdjointCSManager()->GetPostStepWeightCorrection();
>> 213
>> 214 //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
>> 215 //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.
>> 216 //Basically any other differential CS diffCS could be used here (example Penelope).
>> 217
>> 218 G4double diffCS = DiffCrossSectionPerVolumePrimToSecond(currentMaterial, projectileKinEnergy, gammaEnergy);
>> 219 w_corr*=diffCS/diffCSUsed;
>> 220
>> 221 G4double new_weight = aTrack.GetWeight()*w_corr;
>> 222 fParticleChange->SetParentWeightByProcess(false);
>> 223 fParticleChange->SetSecondaryWeightByProcess(false);
>> 224 fParticleChange->ProposeParentWeight(new_weight);
>> 225
>> 226 //Kinematic
>> 227 //---------
>> 228 G4double projectileM0 = theAdjEquivOfDirectPrimPartDef->GetPDGMass();
>> 229 G4double projectileTotalEnergy = projectileM0+projectileKinEnergy;
>> 230 G4double projectileP2 = projectileTotalEnergy*projectileTotalEnergy - projectileM0*projectileM0;
>> 231 G4double projectileP = std::sqrt(projectileP2);
>> 232
>> 233
>> 234 //Angle of the gamma direction with the projectile taken from G4eBremsstrahlungModel
>> 235 //------------------------------------------------
>> 236 G4double u;
>> 237 const G4double a1 = 0.625 , a2 = 3.*a1 , d = 27. ;
174 238
175 if(adjointPrimKinEnergy > GetHighEnergyLimit << 239 if (9./(9.+d) > G4UniformRand()) u = - std::log(G4UniformRand()*G4UniformRand())/a1;
176 { << 240 else u = - std::log(G4UniformRand()*G4UniformRand())/a2;
177 return; <<
178 } <<
179 241
180 G4double projectileKinEnergy = 0.; << 242 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 } <<
209 243
210 // Weight correction: << 244 G4double sint = std::sin(theta);
211 // First w_corr is set to the ratio between << 245 G4double cost = std::cos(theta);
212 // if this has to be done in the model. << 246
213 // For the case of forced interaction this w << 247 G4double phi = twopi * G4UniformRand() ;
214 // the forced interaction. It is important << 248
215 // creation of the secondary << 249 G4ThreeVector projectileMomentum;
216 G4double w_corr = fOutsideWeightFactor; << 250 projectileMomentum=G4ThreeVector(std::cos(phi)*sint,std::sin(phi)*sint,cost)*projectileP; //gamma frame
217 if(fInModelWeightCorr) << 251 if (IsScatProjToProjCase) {//the adjoint primary is the scattered e-
218 { << 252 G4ThreeVector gammaMomentum = (projectileTotalEnergy-adjointPrimTotalEnergy)*G4ThreeVector(0.,0.,1.);
219 w_corr = fCSManager->GetPostStepWeightCorr << 253 G4ThreeVector dirProd=projectileMomentum-gammaMomentum;
>> 254 G4double cost1 = std::cos(dirProd.angle(projectileMomentum));
>> 255 G4double sint1 = std::sqrt(1.-cost1*cost1);
>> 256 projectileMomentum=G4ThreeVector(std::cos(phi)*sint1,std::sin(phi)*sint1,cost1)*projectileP;
>> 257
220 } 258 }
221 << 259
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 260 projectileMomentum.rotateUz(theAdjointPrimary->GetMomentumDirection());
>> 261
>> 262
>> 263
>> 264 if (!IsScatProjToProjCase ){ //kill the primary and add a secondary
>> 265 fParticleChange->ProposeTrackStatus(fStopAndKill);
>> 266 fParticleChange->AddSecondary(new G4DynamicParticle(theAdjEquivOfDirectPrimPartDef,projectileMomentum));
>> 267 }
>> 268 else {
>> 269 fParticleChange->ProposeEnergy(projectileKinEnergy);
>> 270 fParticleChange->ProposeMomentumDirection(projectileMomentum.unit());
>> 271
>> 272 }
>> 273 }
>> 274 ////////////////////////////////////////////////////////////////////////////////
>> 275 //
>> 276 G4AdjointBremsstrahlungModel::~G4AdjointBremsstrahlungModel()
>> 277 {;}
273 278
274 if(!isScatProjToProj) << 279 ////////////////////////////////////////////////////////////////////////////////
275 { // kill the primary and add a secondary << 280 //
276 fParticleChange->ProposeTrackStatus(fStopA << 281 G4double G4AdjointBremsstrahlungModel::DiffCrossSectionPerVolumePrimToSecond(const G4Material* aMaterial,
277 fParticleChange->AddSecondary( << 282 G4double kinEnergyProj, // kinetic energy of the primary particle before the interaction
278 new G4DynamicParticle(fAdjEquivDirectPri << 283 G4double kinEnergyProd // kinetic energy of the secondary particle
279 } << 284 )
280 else << 285 {if (!isDirectModelInitialised) {
281 { << 286 theEmModelManagerForFwdModels->Initialise(G4Electron::Electron(),G4Gamma::Gamma(),1.,0);
282 fParticleChange->ProposeEnergy(projectileK << 287 isDirectModelInitialised =true;
283 fParticleChange->ProposeMomentumDirection( << 288 }
284 } << 289
285 } << 290 return DiffCrossSectionPerVolumePrimToSecondApproximated2(aMaterial,
>> 291 kinEnergyProj,
>> 292 kinEnergyProd);
>> 293 /*return G4VEmAdjointModel::DiffCrossSectionPerVolumePrimToSecond(aMaterial,
>> 294 kinEnergyProj,
>> 295 kinEnergyProd);*/
>> 296 }
286 297
287 ////////////////////////////////////////////// 298 ////////////////////////////////////////////////////////////////////////////////
288 G4double G4AdjointBremsstrahlungModel::DiffCro << 299 //
289 const G4Material* aMaterial, << 300 G4double G4AdjointBremsstrahlungModel::DiffCrossSectionPerVolumePrimToSecondApproximated1(
290 G4double kinEnergyProj, // kin energy of pr << 301 const G4Material* aMaterial,
291 G4double kinEnergyProd // kinetic energy o << 302 G4double kinEnergyProj, // kinetic energy of the primary particle before the interaction
292 ) << 303 G4double kinEnergyProd // kinetic energy of the secondary particle
>> 304 )
293 { 305 {
294 if(!fIsDirectModelInitialised) << 306 G4double dCrossEprod=0.;
295 { << 307 G4double Emax_proj = GetSecondAdjEnergyMaxForProdToProjCase(kinEnergyProd);
296 fEmModelManagerForFwdModels->Initialise(fE << 308 G4double Emin_proj = GetSecondAdjEnergyMinForProdToProjCase(kinEnergyProd);
297 fIsDirectModelInitialised = true; << 309
298 } << 310
299 return G4VEmAdjointModel::DiffCrossSectionPe << 311 //In this approximation we consider that the secondary gammas are sampled with 1/Egamma energy distribution
300 aMaterial, kinEnergyProj, kinEnergyProd); << 312 //This is what is applied in the discrete standard model before the rejection test that make a correction
>> 313 //The application of the same rejection function is not possible here.
>> 314 //The differentiation of the CS over Ecut does not produce neither a good differential CS. That is due to the
>> 315 // fact that in the discrete model the differential CS and the integrated CS are both fitted but separatly and
>> 316 // therefore do not allow a correct numerical differentiation of the integrated CS to get the differential one.
>> 317 // In the future we plan to use the brem secondary spectra from the G4Penelope implementation
>> 318
>> 319 if (kinEnergyProj>Emin_proj && kinEnergyProj<=Emax_proj){
>> 320 G4double sigma=theDirectEMModel->CrossSectionPerVolume(aMaterial,theDirectPrimaryPartDef,kinEnergyProj,1.*keV);
>> 321 dCrossEprod=sigma/kinEnergyProd/std::log(kinEnergyProj/keV);
>> 322 }
>> 323 return dCrossEprod;
>> 324
301 } 325 }
302 326
303 ////////////////////////////////////////////// 327 ////////////////////////////////////////////////////////////////////////////////
304 G4double G4AdjointBremsstrahlungModel::Adjoint << 328 //
305 const G4MaterialCutsCouple* aCouple, G4doubl << 329 G4double G4AdjointBremsstrahlungModel::DiffCrossSectionPerVolumePrimToSecondApproximated2(
306 G4bool isScatProjToProj) << 330 const G4Material* material,
>> 331 G4double kinEnergyProj, // kinetic energy of the primary particle before the interaction
>> 332 G4double kinEnergyProd // kinetic energy of the secondary particle
>> 333 )
307 { 334 {
308 static constexpr G4double maxEnergy = 100. * << 335 //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.) << 336 //used in the direct model
310 if(!fIsDirectModelInitialised) << 337
311 { << 338 G4double dCrossEprod=0.;
312 fEmModelManagerForFwdModels->Initialise(fE << 339
313 fIsDirectModelInitialised = true; << 340 const G4ElementVector* theElementVector = material->GetElementVector();
>> 341 const double* theAtomNumDensityVector = material->GetAtomicNumDensityVector();
>> 342 G4double dum=0.;
>> 343 G4double E1=kinEnergyProd,E2=kinEnergyProd*1.001;
>> 344 G4double dE=E2-E1;
>> 345 for (size_t i=0; i<material->GetNumberOfElements(); i++) {
>> 346 G4double C1=theDirectEMModel->ComputeCrossSectionPerAtom(theDirectPrimaryPartDef,kinEnergyProj,(*theElementVector)[i]->GetZ(),dum ,E1);
>> 347 G4double C2=theDirectEMModel->ComputeCrossSectionPerAtom(theDirectPrimaryPartDef,kinEnergyProj,(*theElementVector)[i]->GetZ(),dum,E2);
>> 348 dCrossEprod += theAtomNumDensityVector[i] * (C1-C2)/dE;
>> 349
>> 350 }
>> 351
>> 352 //Now the Migdal correction
>> 353
>> 354 G4double totalEnergy = kinEnergyProj+electron_mass_c2 ;
>> 355 G4double kp2 = MigdalConstant*totalEnergy*totalEnergy
>> 356 *(material->GetElectronDensity());
>> 357
>> 358
>> 359 G4double MigdalFactor = 1./(1.+kp2/(kinEnergyProd*kinEnergyProd)); // its seems that the factor used in the CS compuation i the direct
>> 360 //model is different than the one used in the secondary sampling by a
>> 361 //factor (1.+kp2) To be checked!
>> 362
>> 363 dCrossEprod*=MigdalFactor;
>> 364 return dCrossEprod;
>> 365
>> 366 }
>> 367 ////////////////////////////////////////////////////////////////////////////////
>> 368 //
>> 369 G4double G4AdjointBremsstrahlungModel::AdjointCrossSection(const G4MaterialCutsCouple* aCouple,
>> 370 G4double primEnergy,
>> 371 G4bool IsScatProjToProjCase)
>> 372 { if (!isDirectModelInitialised) {
>> 373 theEmModelManagerForFwdModels->Initialise(G4Electron::Electron(),G4Gamma::Gamma(),1.,0);
>> 374 isDirectModelInitialised =true;
314 } 375 }
315 if(fUseMatrix) << 376 if (UseMatrix) return G4VEmAdjointModel::AdjointCrossSection(aCouple,primEnergy,IsScatProjToProjCase);
316 return G4VEmAdjointModel::AdjointCrossSect <<
317 <<
318 DefineCurrentMaterial(aCouple); 377 DefineCurrentMaterial(aCouple);
319 G4double Cross = 0.; << 378 G4double Cross=0.;
320 // this gives the constant above << 379 lastCZ=theDirectEMModel->CrossSectionPerVolume(aCouple->GetMaterial(),theDirectPrimaryPartDef,100.*MeV,100.*MeV/std::exp(1.));//this give the constant above
321 fLastCZ = fDirectModel->CrossSectionPerVolum << 380
322 aCouple->GetMaterial(), fDirectPrimaryPart << 381 if (!IsScatProjToProjCase ){
323 << 382 G4double Emax_proj = GetSecondAdjEnergyMaxForProdToProjCase(primEnergy);
324 if(!isScatProjToProj) << 383 G4double Emin_proj = GetSecondAdjEnergyMinForProdToProjCase(primEnergy);
325 { << 384 if (Emax_proj>Emin_proj && primEnergy > currentTcutForDirectSecond) Cross= lastCZ*std::log(Emax_proj/Emin_proj);
326 G4double Emax_proj = GetSecondAdjEnergyMax << 385 }
327 G4double Emin_proj = GetSecondAdjEnergyMin << 386 else {
328 if(Emax_proj > Emin_proj && primEnergy > f << 387 G4double Emax_proj = GetSecondAdjEnergyMaxForScatProjToProjCase(primEnergy);
329 Cross = fCsBiasingFactor * fLastCZ * std << 388 G4double Emin_proj = GetSecondAdjEnergyMinForScatProjToProjCase(primEnergy,currentTcutForDirectSecond);
330 } << 389 if (Emax_proj>Emin_proj) Cross= lastCZ*std::log((Emax_proj-primEnergy)*Emin_proj/Emax_proj/(Emin_proj-primEnergy));
331 else << 390
332 { << 391 }
333 G4double Emax_proj = GetSecondAdjEnergyMax << 392 return Cross;
334 G4double Emin_proj = << 393 }
335 GetSecondAdjEnergyMinForScatProjToProj(p << 394
336 if(Emax_proj > Emin_proj) << 395 G4double G4AdjointBremsstrahlungModel::GetAdjointCrossSection(const G4MaterialCutsCouple* aCouple,
337 Cross = fLastCZ * std::log((Emax_proj - << 396 G4double primEnergy,
338 Emax_proj / ( << 397 G4bool IsScatProjToProjCase)
339 } << 398 {
340 return Cross; << 399 return AdjointCrossSection(aCouple, primEnergy,IsScatProjToProjCase);
>> 400 lastCZ=theDirectEMModel->CrossSectionPerVolume(aCouple->GetMaterial(),theDirectPrimaryPartDef,100.*MeV,100.*MeV/std::exp(1.));//this give the constant above
>> 401 return G4VEmAdjointModel::GetAdjointCrossSection(aCouple, primEnergy,IsScatProjToProjCase);
>> 402
341 } 403 }
>> 404
>> 405
>> 406
342 407