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>> 26 // $Id: G4LivermorePolarizedComptonModel.cc 95950 2016-03-03 10:42:48Z gcosmo $
26 // 27 //
27 // Authors: G.Depaola & F.Longo 28 // Authors: G.Depaola & F.Longo
28 // 29 //
29 // History: 30 // History:
30 // ------- << 31 // --------
31 // <<
32 // 05 Apr 2021 J Allison added quantum entan <<
33 // If the photons have been "tagged" as "quant <<
34 // G4eplusAnnihilation for annihilation into 2 <<
35 // here if - and only if - both photons suffer <<
36 // predictions from Pryce and Ward, Nature No <<
37 // Physical Review 73 (1948) p.440. Experiment <<
38 // entanglement in the MeV regime and its appl <<
39 // D. Watts, J. Allison et al., Nature Communi <<
40 // https://doi.org/10.1038/s41467-021-22907-5. <<
41 // <<
42 // 02 May 2009 S Incerti as V. Ivanchenko pr 32 // 02 May 2009 S Incerti as V. Ivanchenko proposed in G4LivermoreComptonModel.cc
43 // 33 //
44 // Cleanup initialisation and generation of se 34 // Cleanup initialisation and generation of secondaries:
45 // - apply internal high-ener 35 // - apply internal high-energy limit only in constructor
46 // - do not apply low-energy 36 // - do not apply low-energy limit (default is 0)
47 // - remove GetMeanFreePath m 37 // - remove GetMeanFreePath method and table
48 // - added protection against 38 // - added protection against numerical problem in energy sampling
49 // - use G4ElementSelector 39 // - use G4ElementSelector
50 40
51 #include "G4LivermorePolarizedComptonModel.hh" 41 #include "G4LivermorePolarizedComptonModel.hh"
52 #include "G4PhysicalConstants.hh" 42 #include "G4PhysicalConstants.hh"
53 #include "G4SystemOfUnits.hh" 43 #include "G4SystemOfUnits.hh"
54 #include "G4AutoLock.hh" <<
55 #include "G4Electron.hh" 44 #include "G4Electron.hh"
56 #include "G4ParticleChangeForGamma.hh" 45 #include "G4ParticleChangeForGamma.hh"
57 #include "G4LossTableManager.hh" 46 #include "G4LossTableManager.hh"
58 #include "G4VAtomDeexcitation.hh" 47 #include "G4VAtomDeexcitation.hh"
59 #include "G4AtomicShell.hh" 48 #include "G4AtomicShell.hh"
60 #include "G4Gamma.hh" 49 #include "G4Gamma.hh"
61 #include "G4ShellData.hh" 50 #include "G4ShellData.hh"
62 #include "G4DopplerProfile.hh" 51 #include "G4DopplerProfile.hh"
63 #include "G4Log.hh" 52 #include "G4Log.hh"
64 #include "G4Exp.hh" 53 #include "G4Exp.hh"
65 #include "G4Pow.hh" <<
66 #include "G4LogLogInterpolation.hh" 54 #include "G4LogLogInterpolation.hh"
67 #include "G4PhysicsModelCatalog.hh" <<
68 #include "G4EntanglementAuxInfo.hh" <<
69 #include "G4eplusAnnihilationEntanglementClipB <<
70 55
71 //....oooOO0OOooo........oooOO0OOooo........oo 56 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
72 57
73 using namespace std; 58 using namespace std;
74 namespace { G4Mutex LivermorePolarizedComptonM <<
75 59
>> 60 G4int G4LivermorePolarizedComptonModel::maxZ = 99;
>> 61 G4LPhysicsFreeVector* G4LivermorePolarizedComptonModel::data[] = {0};
>> 62 G4ShellData* G4LivermorePolarizedComptonModel::shellData = 0;
>> 63 G4DopplerProfile* G4LivermorePolarizedComptonModel::profileData = 0;
>> 64 G4CompositeEMDataSet* G4LivermorePolarizedComptonModel::scatterFunctionData = 0;
76 65
77 G4PhysicsFreeVector* G4LivermorePolarizedCompt << 66 //static const G4double ln10 = G4Log(10.);
78 G4ShellData* G4LivermorePolarizedCompton <<
79 G4DopplerProfile* G4LivermorePolarizedCompton <<
80 G4CompositeEMDataSet* G4LivermorePolarizedComp <<
81 67
82 //....oooOO0OOooo........oooOO0OOooo........oo 68 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
83 69
84 G4LivermorePolarizedComptonModel::G4LivermoreP 70 G4LivermorePolarizedComptonModel::G4LivermorePolarizedComptonModel(const G4ParticleDefinition*, const G4String& nam)
85 :G4VEmModel(nam),isInitialised(false) 71 :G4VEmModel(nam),isInitialised(false)
86 { 72 {
87 verboseLevel= 1; 73 verboseLevel= 1;
88 // Verbosity scale: 74 // Verbosity scale:
89 // 0 = nothing 75 // 0 = nothing
90 // 1 = warning for energy non-conservation 76 // 1 = warning for energy non-conservation
91 // 2 = details of energy budget 77 // 2 = details of energy budget
92 // 3 = calculation of cross sections, file o 78 // 3 = calculation of cross sections, file openings, sampling of atoms
93 // 4 = entering in methods 79 // 4 = entering in methods
94 80
95 if( verboseLevel>1 ) 81 if( verboseLevel>1 )
96 G4cout << "Livermore Polarized Compton is 82 G4cout << "Livermore Polarized Compton is constructed " << G4endl;
97 83
98 //Mark this model as "applicable" for atomic 84 //Mark this model as "applicable" for atomic deexcitation
99 SetDeexcitationFlag(true); 85 SetDeexcitationFlag(true);
100 86
101 fParticleChange = nullptr; << 87 fParticleChange = 0;
102 fAtomDeexcitation = nullptr; << 88 fAtomDeexcitation = 0;
103 fEntanglementModelID = G4PhysicsModelCatalog <<
104 } 89 }
105 90
106 //....oooOO0OOooo........oooOO0OOooo........oo 91 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
107 92
108 G4LivermorePolarizedComptonModel::~G4Livermore 93 G4LivermorePolarizedComptonModel::~G4LivermorePolarizedComptonModel()
109 { 94 {
110 if(IsMaster()) { 95 if(IsMaster()) {
111 delete shellData; 96 delete shellData;
112 shellData = nullptr; << 97 shellData = 0;
113 delete profileData; 98 delete profileData;
114 profileData = nullptr; << 99 profileData = 0;
115 delete scatterFunctionData; 100 delete scatterFunctionData;
116 scatterFunctionData = nullptr; << 101 scatterFunctionData = 0;
117 for(G4int i=0; i<maxZ; ++i) { 102 for(G4int i=0; i<maxZ; ++i) {
118 if(data[i]) { 103 if(data[i]) {
119 delete data[i]; 104 delete data[i];
120 data[i] = nullptr; << 105 data[i] = 0;
121 } 106 }
122 } 107 }
123 } 108 }
124 } 109 }
125 110
126 //....oooOO0OOooo........oooOO0OOooo........oo 111 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
127 112
128 void G4LivermorePolarizedComptonModel::Initial 113 void G4LivermorePolarizedComptonModel::Initialise(const G4ParticleDefinition* particle,
129 const G 114 const G4DataVector& cuts)
130 { 115 {
131 if (verboseLevel > 1) 116 if (verboseLevel > 1)
132 G4cout << "Calling G4LivermorePolarizedCom 117 G4cout << "Calling G4LivermorePolarizedComptonModel::Initialise()" << G4endl;
133 118
134 // Initialise element selector 119 // Initialise element selector
>> 120
135 if(IsMaster()) { 121 if(IsMaster()) {
>> 122
136 // Access to elements 123 // Access to elements
137 const char* path = G4FindDataDir("G4LEDATA << 124
>> 125 char* path = getenv("G4LEDATA");
138 126
139 G4ProductionCutsTable* theCoupleTable = 127 G4ProductionCutsTable* theCoupleTable =
140 G4ProductionCutsTable::GetProductionCuts 128 G4ProductionCutsTable::GetProductionCutsTable();
141 129
142 G4int numOfCouples = (G4int)theCoupleTable << 130 G4int numOfCouples = theCoupleTable->GetTableSize();
143 131
144 for(G4int i=0; i<numOfCouples; ++i) { 132 for(G4int i=0; i<numOfCouples; ++i) {
145 const G4Material* material = 133 const G4Material* material =
146 theCoupleTable->GetMaterialCutsCouple( << 134 theCoupleTable->GetMaterialCutsCouple(i)->GetMaterial();
147 const G4ElementVector* theElementVector 135 const G4ElementVector* theElementVector = material->GetElementVector();
148 std::size_t nelm = material->GetNumberOf << 136 G4int nelm = material->GetNumberOfElements();
149 137
150 for (std::size_t j=0; j<nelm; ++j) { << 138 for (G4int j=0; j<nelm; ++j) {
151 G4int Z = G4lrint((*theElementVector)[ << 139 G4int Z = G4lrint((*theElementVector)[j]->GetZ());
152 if(Z < 1) { Z = 1; } << 140 if(Z < 1) { Z = 1; }
153 else if(Z > maxZ){ Z = maxZ; } << 141 else if(Z > maxZ){ Z = maxZ; }
154 << 142
155 if( (!data[Z]) ) { ReadData(Z, path); << 143 if( (!data[Z]) ) { ReadData(Z, path); }
156 } 144 }
157 } 145 }
158 146
159 // For Doppler broadening 147 // For Doppler broadening
160 if(!shellData) { 148 if(!shellData) {
161 shellData = new G4ShellData(); 149 shellData = new G4ShellData();
162 shellData->SetOccupancyData(); 150 shellData->SetOccupancyData();
163 G4String file = "/doppler/shell-doppler" 151 G4String file = "/doppler/shell-doppler";
164 shellData->LoadData(file); 152 shellData->LoadData(file);
165 } 153 }
166 if(!profileData) { profileData = new G4Dop 154 if(!profileData) { profileData = new G4DopplerProfile(); }
167 155
168 // Scattering Function 156 // Scattering Function
>> 157
169 if(!scatterFunctionData) 158 if(!scatterFunctionData)
170 { 159 {
171 160
172 G4VDataSetAlgorithm* scatterInterpolation = 161 G4VDataSetAlgorithm* scatterInterpolation = new G4LogLogInterpolation;
173 G4String scatterFile = "comp/ce-sf-"; 162 G4String scatterFile = "comp/ce-sf-";
174 scatterFunctionData = new G4CompositeEMDataS 163 scatterFunctionData = new G4CompositeEMDataSet(scatterInterpolation, 1., 1.);
175 scatterFunctionData->LoadData(scatterFile); 164 scatterFunctionData->LoadData(scatterFile);
176 } 165 }
177 166
178 InitialiseElementSelectors(particle, cuts) 167 InitialiseElementSelectors(particle, cuts);
179 } 168 }
180 169
181 if (verboseLevel > 2) { 170 if (verboseLevel > 2) {
182 G4cout << "Loaded cross section files" << 171 G4cout << "Loaded cross section files" << G4endl;
183 } 172 }
184 173
185 if( verboseLevel>1 ) { 174 if( verboseLevel>1 ) {
186 G4cout << "G4LivermoreComptonModel is init 175 G4cout << "G4LivermoreComptonModel is initialized " << G4endl
187 << "Energy range: " 176 << "Energy range: "
188 << LowEnergyLimit() / eV << " eV - " 177 << LowEnergyLimit() / eV << " eV - "
189 << HighEnergyLimit() / GeV << " GeV" 178 << HighEnergyLimit() / GeV << " GeV"
190 << G4endl; 179 << G4endl;
191 } 180 }
192 // 181 //
193 if(isInitialised) { return; } 182 if(isInitialised) { return; }
194 183
195 fParticleChange = GetParticleChangeForGamma( 184 fParticleChange = GetParticleChangeForGamma();
196 fAtomDeexcitation = G4LossTableManager::Ins 185 fAtomDeexcitation = G4LossTableManager::Instance()->AtomDeexcitation();
197 isInitialised = true; 186 isInitialised = true;
198 } 187 }
199 188
200 189
201 void G4LivermorePolarizedComptonModel::Initial 190 void G4LivermorePolarizedComptonModel::InitialiseLocal(const G4ParticleDefinition*,
202 G4VEmModel* masterModel) 191 G4VEmModel* masterModel)
203 { 192 {
204 SetElementSelectors(masterModel->GetElementS 193 SetElementSelectors(masterModel->GetElementSelectors());
205 } 194 }
206 195
207 //....oooOO0OOooo........oooOO0OOooo........oo 196 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
208 197
209 void G4LivermorePolarizedComptonModel::ReadDat << 198 void G4LivermorePolarizedComptonModel::ReadData(size_t Z, const char* path)
210 { 199 {
211 if (verboseLevel > 1) 200 if (verboseLevel > 1)
212 { 201 {
213 G4cout << "G4LivermorePolarizedComptonMo 202 G4cout << "G4LivermorePolarizedComptonModel::ReadData()"
214 << G4endl; 203 << G4endl;
215 } 204 }
216 if(data[Z]) { return; } 205 if(data[Z]) { return; }
217 const char* datadir = path; 206 const char* datadir = path;
218 if(!datadir) 207 if(!datadir)
219 { 208 {
220 datadir = G4FindDataDir("G4LEDATA"); << 209 datadir = getenv("G4LEDATA");
221 if(!datadir) 210 if(!datadir)
222 { 211 {
223 G4Exception("G4LivermorePolarizedComptonMo 212 G4Exception("G4LivermorePolarizedComptonModel::ReadData()",
224 "em0006",FatalException, 213 "em0006",FatalException,
225 "Environment variable G4LEDATA not d 214 "Environment variable G4LEDATA not defined");
226 return; 215 return;
227 } 216 }
228 } 217 }
229 218
230 data[Z] = new G4PhysicsFreeVector(); << 219 data[Z] = new G4LPhysicsFreeVector();
231 << 220
>> 221 // Activation of spline interpolation
>> 222 data[Z]->SetSpline(false);
>> 223
232 std::ostringstream ost; 224 std::ostringstream ost;
233 ost << datadir << "/livermore/comp/ce-cs-" < 225 ost << datadir << "/livermore/comp/ce-cs-" << Z <<".dat";
234 std::ifstream fin(ost.str().c_str()); 226 std::ifstream fin(ost.str().c_str());
235 227
236 if( !fin.is_open()) 228 if( !fin.is_open())
237 { 229 {
238 G4ExceptionDescription ed; 230 G4ExceptionDescription ed;
239 ed << "G4LivermorePolarizedComptonModel 231 ed << "G4LivermorePolarizedComptonModel data file <" << ost.str().c_str()
240 << "> is not opened!" << G4endl; 232 << "> is not opened!" << G4endl;
241 G4Exception("G4LivermoreComptonModel::Re 233 G4Exception("G4LivermoreComptonModel::ReadData()",
242 "em0003",FatalException, 234 "em0003",FatalException,
243 ed,"G4LEDATA version should be G4EMLOW8. << 235 ed,"G4LEDATA version should be G4EMLOW6.34 or later");
244 return; 236 return;
245 } else { 237 } else {
246 if(verboseLevel > 3) { 238 if(verboseLevel > 3) {
247 G4cout << "File " << ost.str() 239 G4cout << "File " << ost.str()
248 << " is opened by G4LivermorePolarizedC 240 << " is opened by G4LivermorePolarizedComptonModel" << G4endl;
249 } 241 }
250 data[Z]->Retrieve(fin, true); 242 data[Z]->Retrieve(fin, true);
251 data[Z]->ScaleVector(MeV, MeV*barn); 243 data[Z]->ScaleVector(MeV, MeV*barn);
252 } 244 }
253 fin.close(); 245 fin.close();
254 } 246 }
255 247
>> 248
>> 249
>> 250
256 //....oooOO0OOooo........oooOO0OOooo........oo 251 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
257 252
258 G4double G4LivermorePolarizedComptonModel::Com 253 G4double G4LivermorePolarizedComptonModel::ComputeCrossSectionPerAtom(
259 const G 254 const G4ParticleDefinition*,
260 G 255 G4double GammaEnergy,
261 G 256 G4double Z, G4double,
262 G 257 G4double, G4double)
263 { 258 {
264 if (verboseLevel > 3) 259 if (verboseLevel > 3)
265 G4cout << "Calling ComputeCrossSectionPerA 260 G4cout << "Calling ComputeCrossSectionPerAtom() of G4LivermorePolarizedComptonModel" << G4endl;
266 261
267 G4double cs = 0.0; 262 G4double cs = 0.0;
268 263
269 if (GammaEnergy < LowEnergyLimit()) 264 if (GammaEnergy < LowEnergyLimit())
270 return 0.0; 265 return 0.0;
271 266
272 G4int intZ = G4lrint(Z); 267 G4int intZ = G4lrint(Z);
273 if(intZ < 1 || intZ > maxZ) { return cs; } 268 if(intZ < 1 || intZ > maxZ) { return cs; }
274 269
275 G4PhysicsFreeVector* pv = data[intZ]; << 270 G4LPhysicsFreeVector* pv = data[intZ];
276 271
277 // if element was not initialised 272 // if element was not initialised
278 // do initialisation safely for MT mode 273 // do initialisation safely for MT mode
279 if(!pv) 274 if(!pv)
280 { 275 {
281 InitialiseForElement(0, intZ); 276 InitialiseForElement(0, intZ);
282 pv = data[intZ]; 277 pv = data[intZ];
283 if(!pv) { return cs; } 278 if(!pv) { return cs; }
284 } 279 }
285 280
286 G4int n = G4int(pv->GetVectorLength() - 1); << 281 G4int n = pv->GetVectorLength() - 1;
287 G4double e1 = pv->Energy(0); 282 G4double e1 = pv->Energy(0);
288 G4double e2 = pv->Energy(n); 283 G4double e2 = pv->Energy(n);
289 284
290 if(GammaEnergy <= e1) { cs = GammaEnerg 285 if(GammaEnergy <= e1) { cs = GammaEnergy/(e1*e1)*pv->Value(e1); }
291 else if(GammaEnergy <= e2) { cs = pv->Value( 286 else if(GammaEnergy <= e2) { cs = pv->Value(GammaEnergy)/GammaEnergy; }
292 else if(GammaEnergy > e2) { cs = pv->Value( 287 else if(GammaEnergy > e2) { cs = pv->Value(e2)/GammaEnergy; }
293 288
294 return cs; 289 return cs;
295 290
296 } 291 }
297 292
298 //....oooOO0OOooo........oooOO0OOooo........oo 293 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
299 294
300 void G4LivermorePolarizedComptonModel::SampleS 295 void G4LivermorePolarizedComptonModel::SampleSecondaries(std::vector<G4DynamicParticle*>* fvect,
301 const G4MaterialCutsCouple* co 296 const G4MaterialCutsCouple* couple,
302 const G4DynamicParticle* aDyna 297 const G4DynamicParticle* aDynamicGamma,
303 G4double, 298 G4double,
304 G4double) 299 G4double)
305 { 300 {
306 // The scattered gamma energy is sampled acc 301 // The scattered gamma energy is sampled according to Klein - Nishina formula.
307 // The random number techniques of Butcher & 302 // The random number techniques of Butcher & Messel are used (Nuc Phys 20(1960),15).
308 // GEANT4 internal units 303 // GEANT4 internal units
309 // 304 //
310 // Note : Effects due to binding of atomic e 305 // Note : Effects due to binding of atomic electrons are negliged.
311 306
312 if (verboseLevel > 3) 307 if (verboseLevel > 3)
313 G4cout << "Calling SampleSecondaries() of 308 G4cout << "Calling SampleSecondaries() of G4LivermorePolarizedComptonModel" << G4endl;
314 309
315 G4double gammaEnergy0 = aDynamicGamma->GetKi 310 G4double gammaEnergy0 = aDynamicGamma->GetKineticEnergy();
316 311
317 // do nothing below the threshold 312 // do nothing below the threshold
318 // should never get here because the XS is z 313 // should never get here because the XS is zero below the limit
319 if (gammaEnergy0 < LowEnergyLimit()) 314 if (gammaEnergy0 < LowEnergyLimit())
320 return ; 315 return ;
321 316
>> 317
322 G4ThreeVector gammaPolarization0 = aDynamicG 318 G4ThreeVector gammaPolarization0 = aDynamicGamma->GetPolarization();
323 319
324 // Protection: a polarisation parallel to th 320 // Protection: a polarisation parallel to the
325 // direction causes problems; 321 // direction causes problems;
326 // in that case find a random polarization 322 // in that case find a random polarization
>> 323
327 G4ThreeVector gammaDirection0 = aDynamicGamm 324 G4ThreeVector gammaDirection0 = aDynamicGamma->GetMomentumDirection();
328 325
329 // Make sure that the polarization vector is 326 // Make sure that the polarization vector is perpendicular to the
330 // gamma direction. If not 327 // gamma direction. If not
>> 328
331 if(!(gammaPolarization0.isOrthogonal(gammaDi 329 if(!(gammaPolarization0.isOrthogonal(gammaDirection0, 1e-6))||(gammaPolarization0.mag()==0))
332 { // only for testing now 330 { // only for testing now
333 gammaPolarization0 = GetRandomPolarizati 331 gammaPolarization0 = GetRandomPolarization(gammaDirection0);
334 } 332 }
335 else 333 else
336 { 334 {
337 if ( gammaPolarization0.howOrthogonal(ga 335 if ( gammaPolarization0.howOrthogonal(gammaDirection0) != 0)
338 { 336 {
339 gammaPolarization0 = GetPerpendicularPolar 337 gammaPolarization0 = GetPerpendicularPolarization(gammaDirection0, gammaPolarization0);
340 } 338 }
341 } 339 }
>> 340
342 // End of Protection 341 // End of Protection
343 342
344 G4double E0_m = gammaEnergy0 / electron_mass 343 G4double E0_m = gammaEnergy0 / electron_mass_c2 ;
345 344
346 // Select randomly one element in the curren 345 // Select randomly one element in the current material
347 //G4int Z = crossSectionHandler->SelectRando 346 //G4int Z = crossSectionHandler->SelectRandomAtom(couple,gammaEnergy0);
348 const G4ParticleDefinition* particle = aDyn 347 const G4ParticleDefinition* particle = aDynamicGamma->GetDefinition();
349 const G4Element* elm = SelectRandomAtom(coup 348 const G4Element* elm = SelectRandomAtom(couple,particle,gammaEnergy0);
350 G4int Z = (G4int)elm->GetZ(); 349 G4int Z = (G4int)elm->GetZ();
351 350
352 // Sample the energy and the polarization of 351 // Sample the energy and the polarization of the scattered photon
>> 352
353 G4double epsilon, epsilonSq, onecost, sinThe 353 G4double epsilon, epsilonSq, onecost, sinThetaSqr, greject ;
354 354
355 G4double epsilon0Local = 1./(1. + 2*E0_m); 355 G4double epsilon0Local = 1./(1. + 2*E0_m);
356 G4double epsilon0Sq = epsilon0Local*epsilon0 356 G4double epsilon0Sq = epsilon0Local*epsilon0Local;
357 G4double alpha1 = - G4Log(epsilon0Local); << 357 G4double alpha1 = - std::log(epsilon0Local);
358 G4double alpha2 = 0.5*(1.- epsilon0Sq); 358 G4double alpha2 = 0.5*(1.- epsilon0Sq);
359 359
360 G4double wlGamma = h_Planck*c_light/gammaEne 360 G4double wlGamma = h_Planck*c_light/gammaEnergy0;
361 G4double gammaEnergy1; 361 G4double gammaEnergy1;
362 G4ThreeVector gammaDirection1; 362 G4ThreeVector gammaDirection1;
363 363
364 do { 364 do {
365 if ( alpha1/(alpha1+alpha2) > G4UniformRan 365 if ( alpha1/(alpha1+alpha2) > G4UniformRand() )
366 { 366 {
367 epsilon = G4Exp(-alpha1*G4UniformRand()); 367 epsilon = G4Exp(-alpha1*G4UniformRand());
368 epsilonSq = epsilon*epsilon; 368 epsilonSq = epsilon*epsilon;
369 } 369 }
370 else 370 else
371 { 371 {
372 epsilonSq = epsilon0Sq + (1.- epsilon0Sq)*G4 372 epsilonSq = epsilon0Sq + (1.- epsilon0Sq)*G4UniformRand();
373 epsilon = std::sqrt(epsilonSq); 373 epsilon = std::sqrt(epsilonSq);
374 } 374 }
375 375
376 onecost = (1.- epsilon)/(epsilon*E0_m); 376 onecost = (1.- epsilon)/(epsilon*E0_m);
377 sinThetaSqr = onecost*(2.-onecost); 377 sinThetaSqr = onecost*(2.-onecost);
378 378
379 // Protection 379 // Protection
380 if (sinThetaSqr > 1.) 380 if (sinThetaSqr > 1.)
381 { 381 {
382 G4cout 382 G4cout
383 << " -- Warning -- G4LivermorePolarizedCom 383 << " -- Warning -- G4LivermorePolarizedComptonModel::SampleSecondaries "
384 << "sin(theta)**2 = " 384 << "sin(theta)**2 = "
385 << sinThetaSqr 385 << sinThetaSqr
386 << "; set to 1" 386 << "; set to 1"
387 << G4endl; 387 << G4endl;
388 sinThetaSqr = 1.; 388 sinThetaSqr = 1.;
389 } 389 }
390 if (sinThetaSqr < 0.) 390 if (sinThetaSqr < 0.)
391 { 391 {
392 G4cout 392 G4cout
393 << " -- Warning -- G4LivermorePolarizedCom 393 << " -- Warning -- G4LivermorePolarizedComptonModel::SampleSecondaries "
394 << "sin(theta)**2 = " 394 << "sin(theta)**2 = "
395 << sinThetaSqr 395 << sinThetaSqr
396 << "; set to 0" 396 << "; set to 0"
397 << G4endl; 397 << G4endl;
398 sinThetaSqr = 0.; 398 sinThetaSqr = 0.;
399 } 399 }
400 // End protection 400 // End protection
401 401
402 G4double x = std::sqrt(onecost/2.) / (wlG 402 G4double x = std::sqrt(onecost/2.) / (wlGamma/cm);;
403 G4double scatteringFunction = scatterFunct 403 G4double scatteringFunction = scatterFunctionData->FindValue(x,Z-1);
404 greject = (1. - epsilon*sinThetaSqr/(1.+ e 404 greject = (1. - epsilon*sinThetaSqr/(1.+ epsilonSq))*scatteringFunction;
405 405
406 } while(greject < G4UniformRand()*Z); 406 } while(greject < G4UniformRand()*Z);
407 407
408 408
409 // ***************************************** 409 // ****************************************************
410 // Phi determination 410 // Phi determination
411 // ***************************************** 411 // ****************************************************
>> 412
412 G4double phi = SetPhi(epsilon,sinThetaSqr); 413 G4double phi = SetPhi(epsilon,sinThetaSqr);
413 414
414 // 415 //
415 // scattered gamma angles. ( Z - axis along 416 // scattered gamma angles. ( Z - axis along the parent gamma)
416 // 417 //
>> 418
417 G4double cosTheta = 1. - onecost; 419 G4double cosTheta = 1. - onecost;
418 420
419 // Protection 421 // Protection
>> 422
420 if (cosTheta > 1.) 423 if (cosTheta > 1.)
421 { 424 {
422 G4cout 425 G4cout
423 << " -- Warning -- G4LivermorePolarizedCompt 426 << " -- Warning -- G4LivermorePolarizedComptonModel::SampleSecondaries "
424 << "cosTheta = " 427 << "cosTheta = "
425 << cosTheta 428 << cosTheta
426 << "; set to 1" 429 << "; set to 1"
427 << G4endl; 430 << G4endl;
428 cosTheta = 1.; 431 cosTheta = 1.;
429 } 432 }
430 if (cosTheta < -1.) 433 if (cosTheta < -1.)
431 { 434 {
432 G4cout 435 G4cout
433 << " -- Warning -- G4LivermorePolarizedCompt 436 << " -- Warning -- G4LivermorePolarizedComptonModel::SampleSecondaries "
434 << "cosTheta = " 437 << "cosTheta = "
435 << cosTheta 438 << cosTheta
436 << "; set to -1" 439 << "; set to -1"
437 << G4endl; 440 << G4endl;
438 cosTheta = -1.; 441 cosTheta = -1.;
439 } 442 }
440 // End protection 443 // End protection
441 << 444
>> 445
442 G4double sinTheta = std::sqrt (sinThetaSqr); 446 G4double sinTheta = std::sqrt (sinThetaSqr);
443 447
444 // Protection 448 // Protection
445 if (sinTheta > 1.) 449 if (sinTheta > 1.)
446 { 450 {
447 G4cout 451 G4cout
448 << " -- Warning -- G4LivermorePolarizedCompt 452 << " -- Warning -- G4LivermorePolarizedComptonModel::SampleSecondaries "
449 << "sinTheta = " 453 << "sinTheta = "
450 << sinTheta 454 << sinTheta
451 << "; set to 1" 455 << "; set to 1"
452 << G4endl; 456 << G4endl;
453 sinTheta = 1.; 457 sinTheta = 1.;
454 } 458 }
455 if (sinTheta < -1.) 459 if (sinTheta < -1.)
456 { 460 {
457 G4cout 461 G4cout
458 << " -- Warning -- G4LivermorePolarizedCompt 462 << " -- Warning -- G4LivermorePolarizedComptonModel::SampleSecondaries "
459 << "sinTheta = " 463 << "sinTheta = "
460 << sinTheta 464 << sinTheta
461 << "; set to -1" 465 << "; set to -1"
462 << G4endl; 466 << G4endl;
463 sinTheta = -1.; 467 sinTheta = -1.;
464 } 468 }
465 // End protection 469 // End protection
466 470
467 // Check for entanglement and re-sample phi <<
468 <<
469 const auto* auxInfo <<
470 = fParticleChange->GetCurrentTrack()->GetAux <<
471 if (auxInfo) { <<
472 const auto* entanglementAuxInfo = dynamic_ <<
473 if (entanglementAuxInfo) { <<
474 auto* clipBoard = dynamic_cast<G4eplusAn <<
475 (entanglementAuxInfo->GetEntanglementCli <<
476 if (clipBoard) { <<
477 // This is an entangled photon from ep <<
478 // If this is the first scatter of the <<
479 // phi on the clipboard. <<
480 // If this is the first scatter of the <<
481 // phi of the first scatter of the fir <<
482 // theta of the second photon, to samp <<
483 if (clipBoard->IsTrack1Measurement()) <<
484 // Check we have the relevant track. <<
485 // necessary but I want to be sure t <<
486 // entangled system are properly pai <<
487 // Note: the tracking manager pops t <<
488 // will rely on that. (If not, the <<
489 // more complicated to ensure we mat <<
490 // So our track 1 is clipboard track <<
491 if (clipBoard->GetTrackB() == fParti <<
492 // This is the first scatter of th <<
493 // // Debug <<
494 // auto* track1 = fPart <<
495 // G4cout <<
496 // << "This is the firs <<
497 // << "\nTrack: " << tr <<
498 // << ", Parent: " << t <<
499 // << ", Name: " << cli <<
500 // << G4endl; <<
501 // // End debug <<
502 clipBoard->ResetTrack1Measurement( <<
503 // Store cos(theta),phi of first p <<
504 clipBoard->SetComptonCosTheta1(cos <<
505 clipBoard->SetComptonPhi1(phi); <<
506 } <<
507 } else if (clipBoard->IsTrack2Measurem <<
508 // Check we have the relevant track. <<
509 // Remember our track 2 is clipboard <<
510 if (clipBoard->GetTrackA() == fParti <<
511 // This is the first scatter of th <<
512 // // Debug <<
513 // auto* track2 = fPart <<
514 // G4cout <<
515 // << "This is the firs <<
516 // << "\nTrack: " << tr <<
517 // << ", Parent: " << t <<
518 // << ", Name: " << cli <<
519 // << G4endl; <<
520 // // End debug <<
521 clipBoard->ResetTrack2Measurement( <<
522 <<
523 // Get cos(theta),phi of first pho <<
524 const G4double& cosTheta1 = clipBo <<
525 const G4double& phi1 = clipBoard-> <<
526 // For clarity make aliases for th <<
527 const G4double& cosTheta2 = cosThe <<
528 G4double& phi2 = phi; <<
529 // G4cout << "cosTheta1 <<
530 // G4cout << "cosTheta2 <<
531 <<
532 // Re-sample phi <<
533 // Draw the difference of azimutha <<
534 // A + B * cos(2*deltaPhi), or rat <<
535 // C = A / (A + |B|) and D = B / ( <<
536 const G4double sin2Theta1 = 1.-cos <<
537 const G4double sin2Theta2 = 1.-cos <<
538 <<
539 // Pryce and Ward, Nature No 4065 <<
540 auto* g4Pow = G4Pow::GetInstance() <<
541 const G4double A = <<
542 ((g4Pow->powN(1.-cosTheta1,3))+2.) <<
543 ((g4Pow->powN(2.-cosTheta1,3)*g4Po <<
544 const G4double B = -(sin2Theta1*si <<
545 ((g4Pow->powN(2.-cosTheta1,2)*g4Po <<
546 <<
547 // // Snyder et al, Physical Re <<
548 // // (This is an alternative f <<
549 // const G4double& k0 = gammaEn <<
550 // const G4double k1 = k0/(2.-c <<
551 // const G4double k2 = k0/(2.-c <<
552 // const G4double gamma1 = k1/k <<
553 // const G4double gamma2 = k2/k <<
554 // const G4double A1 = gamma1*g <<
555 // const G4double B1 = 2.*sin2T <<
556 // // That's A1 + B1*sin2(delta <<
557 // const G4double A = A1 + 0.5* <<
558 // const G4double B = -0.5*B1; <<
559 <<
560 const G4double maxValue = A + std: <<
561 const G4double C = A / maxValue; <<
562 const G4double D = B / maxValue; <<
563 // G4cout << "A,B,C,D: " << A < <<
564 <<
565 // Sample delta phi <<
566 G4double deltaPhi; <<
567 const G4int maxCount = 999999; <<
568 G4int iCount = 0; <<
569 for (; iCount < maxCount; ++iCount <<
570 deltaPhi = twopi * G4UniformRand <<
571 if (G4UniformRand() < C + D * co <<
572 } <<
573 if (iCount >= maxCount ) { <<
574 G4cout << "G4LivermorePolarizedC <<
575 << "Re-sampled delta phi not fou <<
576 << " tries - carrying on anyway. <<
577 } <<
578 <<
579 // Thus, the desired second photon <<
580 phi2 = deltaPhi - phi1 + halfpi; <<
581 // The minus sign is in above stat <<
582 // annihilation photons are in opp <<
583 // are measured in the opposite di <<
584 // halfpi is added for the followi <<
585 // In this function phi is relativ <<
586 // SystemOfRefChange below. We kno <<
587 // the polarisations of the two an <<
588 // to each other, i.e., halfpi dif <<
589 // Furthermore, only sin(phi) and <<
590 // need to place any range constra <<
591 // if (phi2 > pi) { <<
592 // phi2 -= twopi; <<
593 // } <<
594 // if (phi2 < -pi) { <<
595 // phi2 += twopi; <<
596 // } <<
597 } <<
598 } <<
599 } <<
600 } <<
601 } <<
602 <<
603 // End of entanglement <<
604 471
605 G4double dirx = sinTheta*std::cos(phi); 472 G4double dirx = sinTheta*std::cos(phi);
606 G4double diry = sinTheta*std::sin(phi); 473 G4double diry = sinTheta*std::sin(phi);
607 G4double dirz = cosTheta ; 474 G4double dirz = cosTheta ;
608 << 475
>> 476
609 // oneCosT , eom 477 // oneCosT , eom
610 478
611 // Doppler broadening - Method based on: 479 // Doppler broadening - Method based on:
612 // Y. Namito, S. Ban and H. Hirayama, 480 // Y. Namito, S. Ban and H. Hirayama,
613 // "Implementation of the Doppler Broadening 481 // "Implementation of the Doppler Broadening of a Compton-Scattered Photon Into the EGS4 Code"
614 // NIM A 349, pp. 489-494, 1994 482 // NIM A 349, pp. 489-494, 1994
615 483
616 // Maximum number of sampling iterations 484 // Maximum number of sampling iterations
>> 485
617 static G4int maxDopplerIterations = 1000; 486 static G4int maxDopplerIterations = 1000;
618 G4double bindingE = 0.; 487 G4double bindingE = 0.;
619 G4double photonEoriginal = epsilon * gammaEn 488 G4double photonEoriginal = epsilon * gammaEnergy0;
620 G4double photonE = -1.; 489 G4double photonE = -1.;
621 G4int iteration = 0; 490 G4int iteration = 0;
622 G4double eMax = gammaEnergy0; 491 G4double eMax = gammaEnergy0;
623 492
624 G4int shellIdx = 0; 493 G4int shellIdx = 0;
625 494
626 if (verboseLevel > 3) { 495 if (verboseLevel > 3) {
627 G4cout << "Started loop to sample broading 496 G4cout << "Started loop to sample broading" << G4endl;
628 } 497 }
629 498
630 do 499 do
631 { 500 {
632 iteration++; 501 iteration++;
633 // Select shell based on shell occupancy 502 // Select shell based on shell occupancy
634 shellIdx = shellData->SelectRandomShell( 503 shellIdx = shellData->SelectRandomShell(Z);
635 bindingE = shellData->BindingEnergy(Z,sh 504 bindingE = shellData->BindingEnergy(Z,shellIdx);
636 505
637 if (verboseLevel > 3) { 506 if (verboseLevel > 3) {
638 G4cout << "Shell ID= " << shellIdx 507 G4cout << "Shell ID= " << shellIdx
639 << " Ebind(keV)= " << bindingE/keV << 508 << " Ebind(keV)= " << bindingE/keV << G4endl;
640 } 509 }
641 eMax = gammaEnergy0 - bindingE; 510 eMax = gammaEnergy0 - bindingE;
642 511
643 // Randomly sample bound electron moment 512 // Randomly sample bound electron momentum (memento: the data set is in Atomic Units)
644 G4double pSample = profileData->RandomSe 513 G4double pSample = profileData->RandomSelectMomentum(Z,shellIdx);
645 514
646 if (verboseLevel > 3) { 515 if (verboseLevel > 3) {
647 G4cout << "pSample= " << pSample << G4e 516 G4cout << "pSample= " << pSample << G4endl;
648 } 517 }
649 // Rescale from atomic units 518 // Rescale from atomic units
650 G4double pDoppler = pSample * fine_struc 519 G4double pDoppler = pSample * fine_structure_const;
651 G4double pDoppler2 = pDoppler * pDoppler 520 G4double pDoppler2 = pDoppler * pDoppler;
652 G4double var2 = 1. + onecost * E0_m; 521 G4double var2 = 1. + onecost * E0_m;
653 G4double var3 = var2*var2 - pDoppler2; 522 G4double var3 = var2*var2 - pDoppler2;
654 G4double var4 = var2 - pDoppler2 * cosTh 523 G4double var4 = var2 - pDoppler2 * cosTheta;
655 G4double var = var4*var4 - var3 + pDoppl 524 G4double var = var4*var4 - var3 + pDoppler2 * var3;
656 if (var > 0.) 525 if (var > 0.)
657 { 526 {
658 G4double varSqrt = std::sqrt(var); 527 G4double varSqrt = std::sqrt(var);
659 G4double scale = gammaEnergy0 / var3; 528 G4double scale = gammaEnergy0 / var3;
660 // Random select either root 529 // Random select either root
661 if (G4UniformRand() < 0.5) photonE = (var4 530 if (G4UniformRand() < 0.5) photonE = (var4 - varSqrt) * scale;
662 else photonE = (var4 + varSqrt) * scale; 531 else photonE = (var4 + varSqrt) * scale;
663 } 532 }
664 else 533 else
665 { 534 {
666 photonE = -1.; 535 photonE = -1.;
667 } 536 }
668 } while ( iteration <= maxDopplerIterations 537 } while ( iteration <= maxDopplerIterations &&
669 (photonE < 0. || photonE > eMax || phot 538 (photonE < 0. || photonE > eMax || photonE < eMax*G4UniformRand()) );
>> 539 //while (iteration <= maxDopplerIterations && photonE > eMax); ???
>> 540
670 541
671 // End of recalculation of photon energy wit 542 // End of recalculation of photon energy with Doppler broadening
672 // Revert to original if maximum number of i 543 // Revert to original if maximum number of iterations threshold has been reached
673 if (iteration >= maxDopplerIterations) 544 if (iteration >= maxDopplerIterations)
674 { 545 {
675 photonE = photonEoriginal; 546 photonE = photonEoriginal;
676 bindingE = 0.; 547 bindingE = 0.;
677 } 548 }
678 549
679 gammaEnergy1 = photonE; 550 gammaEnergy1 = photonE;
680 551
681 // 552 //
682 // update G4VParticleChange for the scattere 553 // update G4VParticleChange for the scattered photon
683 // 554 //
>> 555
>> 556
>> 557
>> 558 // gammaEnergy1 = epsilon*gammaEnergy0;
>> 559
>> 560
684 // New polarization 561 // New polarization
>> 562
685 G4ThreeVector gammaPolarization1 = SetNewPol 563 G4ThreeVector gammaPolarization1 = SetNewPolarization(epsilon,
686 sinThetaSqr, 564 sinThetaSqr,
687 phi, 565 phi,
688 cosTheta); 566 cosTheta);
689 567
690 // Set new direction 568 // Set new direction
691 G4ThreeVector tmpDirection1( dirx,diry,dirz 569 G4ThreeVector tmpDirection1( dirx,diry,dirz );
692 gammaDirection1 = tmpDirection1; 570 gammaDirection1 = tmpDirection1;
693 571
694 // Change reference frame. 572 // Change reference frame.
>> 573
695 SystemOfRefChange(gammaDirection0,gammaDirec 574 SystemOfRefChange(gammaDirection0,gammaDirection1,
696 gammaPolarization0,gammaPolarization1) 575 gammaPolarization0,gammaPolarization1);
697 576
698 if (gammaEnergy1 > 0.) 577 if (gammaEnergy1 > 0.)
699 { 578 {
700 fParticleChange->SetProposedKineticEnerg 579 fParticleChange->SetProposedKineticEnergy( gammaEnergy1 ) ;
701 fParticleChange->ProposeMomentumDirectio 580 fParticleChange->ProposeMomentumDirection( gammaDirection1 );
702 fParticleChange->ProposePolarization( ga 581 fParticleChange->ProposePolarization( gammaPolarization1 );
703 } 582 }
704 else 583 else
705 { 584 {
706 gammaEnergy1 = 0.; 585 gammaEnergy1 = 0.;
707 fParticleChange->SetProposedKineticEnerg 586 fParticleChange->SetProposedKineticEnergy(0.) ;
708 fParticleChange->ProposeTrackStatus(fSto 587 fParticleChange->ProposeTrackStatus(fStopAndKill);
709 } 588 }
710 589
711 // 590 //
712 // kinematic of the scattered electron 591 // kinematic of the scattered electron
713 // 592 //
>> 593
714 G4double ElecKineEnergy = gammaEnergy0 - gam 594 G4double ElecKineEnergy = gammaEnergy0 - gammaEnergy1 -bindingE;
715 595
716 // SI -protection against negative final ene 596 // SI -protection against negative final energy: no e- is created
717 // like in G4LivermoreComptonModel.cc 597 // like in G4LivermoreComptonModel.cc
718 if(ElecKineEnergy < 0.0) { 598 if(ElecKineEnergy < 0.0) {
719 fParticleChange->ProposeLocalEnergyDeposit 599 fParticleChange->ProposeLocalEnergyDeposit(gammaEnergy0 - gammaEnergy1);
720 return; 600 return;
721 } 601 }
722 602
>> 603 // SI - Removed range test
>> 604
723 G4double ElecMomentum = std::sqrt(ElecKineEn 605 G4double ElecMomentum = std::sqrt(ElecKineEnergy*(ElecKineEnergy+2.*electron_mass_c2));
724 606
725 G4ThreeVector ElecDirection((gammaEnergy0 * 607 G4ThreeVector ElecDirection((gammaEnergy0 * gammaDirection0 -
726 gammaEnergy1 * gammaDirection1) * ( 608 gammaEnergy1 * gammaDirection1) * (1./ElecMomentum));
727 609
728 G4DynamicParticle* dp = << 610 G4DynamicParticle* dp = new G4DynamicParticle (G4Electron::Electron(),ElecDirection.unit(),ElecKineEnergy) ;
729 new G4DynamicParticle (G4Electron::Electro <<
730 fvect->push_back(dp); 611 fvect->push_back(dp);
731 612
732 // sample deexcitation 613 // sample deexcitation
733 // << 614 //
>> 615
734 if (verboseLevel > 3) { 616 if (verboseLevel > 3) {
735 G4cout << "Started atomic de-excitation " 617 G4cout << "Started atomic de-excitation " << fAtomDeexcitation << G4endl;
736 } 618 }
737 619
738 if(fAtomDeexcitation && iteration < maxDoppl 620 if(fAtomDeexcitation && iteration < maxDopplerIterations) {
739 G4int index = couple->GetIndex(); 621 G4int index = couple->GetIndex();
740 if(fAtomDeexcitation->CheckDeexcitationAct 622 if(fAtomDeexcitation->CheckDeexcitationActiveRegion(index)) {
741 std::size_t nbefore = fvect->size(); << 623 size_t nbefore = fvect->size();
742 G4AtomicShellEnumerator as = G4AtomicShe 624 G4AtomicShellEnumerator as = G4AtomicShellEnumerator(shellIdx);
743 const G4AtomicShell* shell = fAtomDeexci 625 const G4AtomicShell* shell = fAtomDeexcitation->GetAtomicShell(Z, as);
744 fAtomDeexcitation->GenerateParticles(fve 626 fAtomDeexcitation->GenerateParticles(fvect, shell, Z, index);
745 std::size_t nafter = fvect->size(); << 627 size_t nafter = fvect->size();
746 if(nafter > nbefore) { 628 if(nafter > nbefore) {
747 for (std::size_t i=nbefore; i<nafter; ++i) { << 629 for (size_t i=nbefore; i<nafter; ++i) {
748 //Check if there is enough residual energy 630 //Check if there is enough residual energy
749 if (bindingE >= ((*fvect)[i])->GetKineticE 631 if (bindingE >= ((*fvect)[i])->GetKineticEnergy())
750 { 632 {
751 //Ok, this is a valid secondary: 633 //Ok, this is a valid secondary: keep it
752 bindingE -= ((*fvect)[i])->GetKineticE 634 bindingE -= ((*fvect)[i])->GetKineticEnergy();
753 } 635 }
754 else 636 else
755 { 637 {
756 //Invalid secondary: not enough energy 638 //Invalid secondary: not enough energy to create it!
757 //Keep its energy in the local deposit 639 //Keep its energy in the local deposit
758 delete (*fvect)[i]; 640 delete (*fvect)[i];
759 (*fvect)[i]=0; 641 (*fvect)[i]=0;
760 } 642 }
761 } 643 }
762 } 644 }
763 } 645 }
764 } 646 }
765 //This should never happen 647 //This should never happen
766 if(bindingE < 0.0) 648 if(bindingE < 0.0)
767 G4Exception("G4LivermoreComptonModel::Samp 649 G4Exception("G4LivermoreComptonModel::SampleSecondaries()",
768 "em2050",FatalException,"Negative local en 650 "em2050",FatalException,"Negative local energy deposit");
769 651
770 fParticleChange->ProposeLocalEnergyDeposit(b 652 fParticleChange->ProposeLocalEnergyDeposit(bindingE);
771 653
772 } 654 }
773 655
774 //....oooOO0OOooo........oooOO0OOooo........oo 656 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
775 657
776 G4double G4LivermorePolarizedComptonModel::Set 658 G4double G4LivermorePolarizedComptonModel::SetPhi(G4double energyRate,
777 G4double sinSqrTh) 659 G4double sinSqrTh)
778 { 660 {
779 G4double rand1; 661 G4double rand1;
780 G4double rand2; 662 G4double rand2;
781 G4double phiProbability; 663 G4double phiProbability;
782 G4double phi; 664 G4double phi;
783 G4double a, b; 665 G4double a, b;
784 666
785 do 667 do
786 { 668 {
787 rand1 = G4UniformRand(); 669 rand1 = G4UniformRand();
788 rand2 = G4UniformRand(); 670 rand2 = G4UniformRand();
789 phiProbability=0.; 671 phiProbability=0.;
790 phi = twopi*rand1; 672 phi = twopi*rand1;
791 673
792 a = 2*sinSqrTh; 674 a = 2*sinSqrTh;
793 b = energyRate + 1/energyRate; 675 b = energyRate + 1/energyRate;
794 676
795 phiProbability = 1 - (a/b)*(std::cos(phi 677 phiProbability = 1 - (a/b)*(std::cos(phi)*std::cos(phi));
>> 678
>> 679
>> 680
796 } 681 }
797 while ( rand2 > phiProbability ); 682 while ( rand2 > phiProbability );
798 return phi; 683 return phi;
799 } 684 }
800 685
801 686
802 //....oooOO0OOooo........oooOO0OOooo........oo 687 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
803 688
804 G4ThreeVector G4LivermorePolarizedComptonModel 689 G4ThreeVector G4LivermorePolarizedComptonModel::SetPerpendicularVector(G4ThreeVector& a)
805 { 690 {
806 G4double dx = a.x(); 691 G4double dx = a.x();
807 G4double dy = a.y(); 692 G4double dy = a.y();
808 G4double dz = a.z(); 693 G4double dz = a.z();
809 G4double x = dx < 0.0 ? -dx : dx; 694 G4double x = dx < 0.0 ? -dx : dx;
810 G4double y = dy < 0.0 ? -dy : dy; 695 G4double y = dy < 0.0 ? -dy : dy;
811 G4double z = dz < 0.0 ? -dz : dz; 696 G4double z = dz < 0.0 ? -dz : dz;
812 if (x < y) { 697 if (x < y) {
813 return x < z ? G4ThreeVector(-dy,dx,0) : G 698 return x < z ? G4ThreeVector(-dy,dx,0) : G4ThreeVector(0,-dz,dy);
814 }else{ 699 }else{
815 return y < z ? G4ThreeVector(dz,0,-dx) : G 700 return y < z ? G4ThreeVector(dz,0,-dx) : G4ThreeVector(-dy,dx,0);
816 } 701 }
817 } 702 }
818 703
819 //....oooOO0OOooo........oooOO0OOooo........oo 704 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
820 705
821 G4ThreeVector G4LivermorePolarizedComptonModel 706 G4ThreeVector G4LivermorePolarizedComptonModel::GetRandomPolarization(G4ThreeVector& direction0)
822 { 707 {
823 G4ThreeVector d0 = direction0.unit(); 708 G4ThreeVector d0 = direction0.unit();
824 G4ThreeVector a1 = SetPerpendicularVector(d0 709 G4ThreeVector a1 = SetPerpendicularVector(d0); //different orthogonal
825 G4ThreeVector a0 = a1.unit(); // unit vector 710 G4ThreeVector a0 = a1.unit(); // unit vector
826 711
827 G4double rand1 = G4UniformRand(); 712 G4double rand1 = G4UniformRand();
828 713
829 G4double angle = twopi*rand1; // random pola 714 G4double angle = twopi*rand1; // random polar angle
830 G4ThreeVector b0 = d0.cross(a0); // cross pr 715 G4ThreeVector b0 = d0.cross(a0); // cross product
831 716
832 G4ThreeVector c; 717 G4ThreeVector c;
833 718
834 c.setX(std::cos(angle)*(a0.x())+std::sin(ang 719 c.setX(std::cos(angle)*(a0.x())+std::sin(angle)*b0.x());
835 c.setY(std::cos(angle)*(a0.y())+std::sin(ang 720 c.setY(std::cos(angle)*(a0.y())+std::sin(angle)*b0.y());
836 c.setZ(std::cos(angle)*(a0.z())+std::sin(ang 721 c.setZ(std::cos(angle)*(a0.z())+std::sin(angle)*b0.z());
837 722
838 G4ThreeVector c0 = c.unit(); 723 G4ThreeVector c0 = c.unit();
839 724
840 return c0; 725 return c0;
>> 726
841 } 727 }
842 728
843 //....oooOO0OOooo........oooOO0OOooo........oo 729 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
844 730
845 G4ThreeVector G4LivermorePolarizedComptonModel 731 G4ThreeVector G4LivermorePolarizedComptonModel::GetPerpendicularPolarization
846 (const G4ThreeVector& gammaDirection, const G4 732 (const G4ThreeVector& gammaDirection, const G4ThreeVector& gammaPolarization) const
847 { 733 {
>> 734
848 // 735 //
849 // The polarization of a photon is always pe 736 // The polarization of a photon is always perpendicular to its momentum direction.
850 // Therefore this function removes those vec 737 // Therefore this function removes those vector component of gammaPolarization, which
851 // points in direction of gammaDirection 738 // points in direction of gammaDirection
852 // 739 //
853 // Mathematically we search the projection o 740 // Mathematically we search the projection of the vector a on the plane E, where n is the
854 // plains normal vector. 741 // plains normal vector.
855 // The basic equation can be found in each g 742 // The basic equation can be found in each geometry book (e.g. Bronstein):
856 // p = a - (a o n)/(n o n)*n 743 // p = a - (a o n)/(n o n)*n
857 744
858 return gammaPolarization - gammaPolarization 745 return gammaPolarization - gammaPolarization.dot(gammaDirection)/gammaDirection.dot(gammaDirection) * gammaDirection;
859 } 746 }
860 747
861 //....oooOO0OOooo........oooOO0OOooo........oo 748 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
862 749
863 G4ThreeVector G4LivermorePolarizedComptonModel 750 G4ThreeVector G4LivermorePolarizedComptonModel::SetNewPolarization(G4double epsilon,
864 G4double sinSqrTh, 751 G4double sinSqrTh,
865 G4double phi, 752 G4double phi,
866 G4double costheta) 753 G4double costheta)
867 { 754 {
868 G4double rand1; 755 G4double rand1;
869 G4double rand2; 756 G4double rand2;
870 G4double cosPhi = std::cos(phi); 757 G4double cosPhi = std::cos(phi);
871 G4double sinPhi = std::sin(phi); 758 G4double sinPhi = std::sin(phi);
872 G4double sinTheta = std::sqrt(sinSqrTh); 759 G4double sinTheta = std::sqrt(sinSqrTh);
873 G4double cosSqrPhi = cosPhi*cosPhi; 760 G4double cosSqrPhi = cosPhi*cosPhi;
874 // G4double cossqrth = 1.-sinSqrTh; 761 // G4double cossqrth = 1.-sinSqrTh;
875 // G4double sinsqrphi = sinPhi*sinPhi; 762 // G4double sinsqrphi = sinPhi*sinPhi;
876 G4double normalisation = std::sqrt(1. - cosS 763 G4double normalisation = std::sqrt(1. - cosSqrPhi*sinSqrTh);
877 764
>> 765
878 // Determination of Theta 766 // Determination of Theta
>> 767
>> 768 // ---- MGP ---- Commented out the following 3 lines to avoid compilation
>> 769 // warnings (unused variables)
>> 770 // G4double thetaProbability;
879 G4double theta; 771 G4double theta;
>> 772 // G4double a, b;
>> 773 // G4double cosTheta;
>> 774
>> 775 /*
>> 776
>> 777 depaola method
>> 778
>> 779 do
>> 780 {
>> 781 rand1 = G4UniformRand();
>> 782 rand2 = G4UniformRand();
>> 783 thetaProbability=0.;
>> 784 theta = twopi*rand1;
>> 785 a = 4*normalisation*normalisation;
>> 786 b = (epsilon + 1/epsilon) - 2;
>> 787 thetaProbability = (b + a*std::cos(theta)*std::cos(theta))/(a+b);
>> 788 cosTheta = std::cos(theta);
>> 789 }
>> 790 while ( rand2 > thetaProbability );
>> 791
>> 792 G4double cosBeta = cosTheta;
>> 793
>> 794 */
>> 795
880 796
881 // Dan Xu method (IEEE TNS, 52, 1160 (2005)) 797 // Dan Xu method (IEEE TNS, 52, 1160 (2005))
>> 798
882 rand1 = G4UniformRand(); 799 rand1 = G4UniformRand();
883 rand2 = G4UniformRand(); 800 rand2 = G4UniformRand();
884 801
885 if (rand1<(epsilon+1.0/epsilon-2)/(2.0*(epsi 802 if (rand1<(epsilon+1.0/epsilon-2)/(2.0*(epsilon+1.0/epsilon)-4.0*sinSqrTh*cosSqrPhi))
886 { 803 {
887 if (rand2<0.5) 804 if (rand2<0.5)
888 theta = pi/2.0; 805 theta = pi/2.0;
889 else 806 else
890 theta = 3.0*pi/2.0; 807 theta = 3.0*pi/2.0;
891 } 808 }
892 else 809 else
893 { 810 {
894 if (rand2<0.5) 811 if (rand2<0.5)
895 theta = 0; 812 theta = 0;
896 else 813 else
897 theta = pi; 814 theta = pi;
898 } 815 }
899 G4double cosBeta = std::cos(theta); 816 G4double cosBeta = std::cos(theta);
900 G4double sinBeta = std::sqrt(1-cosBeta*cosBe 817 G4double sinBeta = std::sqrt(1-cosBeta*cosBeta);
901 818
902 G4ThreeVector gammaPolarization1; 819 G4ThreeVector gammaPolarization1;
903 820
904 G4double xParallel = normalisation*cosBeta; 821 G4double xParallel = normalisation*cosBeta;
905 G4double yParallel = -(sinSqrTh*cosPhi*sinPh 822 G4double yParallel = -(sinSqrTh*cosPhi*sinPhi)*cosBeta/normalisation;
906 G4double zParallel = -(costheta*sinTheta*cos 823 G4double zParallel = -(costheta*sinTheta*cosPhi)*cosBeta/normalisation;
907 G4double xPerpendicular = 0.; 824 G4double xPerpendicular = 0.;
908 G4double yPerpendicular = (costheta)*sinBeta 825 G4double yPerpendicular = (costheta)*sinBeta/normalisation;
909 G4double zPerpendicular = -(sinTheta*sinPhi) 826 G4double zPerpendicular = -(sinTheta*sinPhi)*sinBeta/normalisation;
910 827
911 G4double xTotal = (xParallel + xPerpendicula 828 G4double xTotal = (xParallel + xPerpendicular);
912 G4double yTotal = (yParallel + yPerpendicula 829 G4double yTotal = (yParallel + yPerpendicular);
913 G4double zTotal = (zParallel + zPerpendicula 830 G4double zTotal = (zParallel + zPerpendicular);
914 831
915 gammaPolarization1.setX(xTotal); 832 gammaPolarization1.setX(xTotal);
916 gammaPolarization1.setY(yTotal); 833 gammaPolarization1.setY(yTotal);
917 gammaPolarization1.setZ(zTotal); 834 gammaPolarization1.setZ(zTotal);
918 835
919 return gammaPolarization1; 836 return gammaPolarization1;
>> 837
920 } 838 }
921 839
922 //....oooOO0OOooo........oooOO0OOooo........oo 840 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
923 841
924 void G4LivermorePolarizedComptonModel::SystemO 842 void G4LivermorePolarizedComptonModel::SystemOfRefChange(G4ThreeVector& direction0,
925 G4ThreeVector& direction1, 843 G4ThreeVector& direction1,
926 G4ThreeVector& polarization0, 844 G4ThreeVector& polarization0,
927 G4ThreeVector& polarization1) 845 G4ThreeVector& polarization1)
928 { 846 {
929 // direction0 is the original photon directi 847 // direction0 is the original photon direction ---> z
930 // polarization0 is the original photon pola 848 // polarization0 is the original photon polarization ---> x
931 // need to specify y axis in the real refere 849 // need to specify y axis in the real reference frame ---> y
932 G4ThreeVector Axis_Z0 = direction0.unit(); 850 G4ThreeVector Axis_Z0 = direction0.unit();
933 G4ThreeVector Axis_X0 = polarization0.unit() 851 G4ThreeVector Axis_X0 = polarization0.unit();
934 G4ThreeVector Axis_Y0 = (Axis_Z0.cross(Axis_ 852 G4ThreeVector Axis_Y0 = (Axis_Z0.cross(Axis_X0)).unit(); // to be confirmed;
935 853
936 G4double direction_x = direction1.getX(); 854 G4double direction_x = direction1.getX();
937 G4double direction_y = direction1.getY(); 855 G4double direction_y = direction1.getY();
938 G4double direction_z = direction1.getZ(); 856 G4double direction_z = direction1.getZ();
939 857
940 direction1 = (direction_x*Axis_X0 + directio 858 direction1 = (direction_x*Axis_X0 + direction_y*Axis_Y0 + direction_z*Axis_Z0).unit();
941 G4double polarization_x = polarization1.getX 859 G4double polarization_x = polarization1.getX();
942 G4double polarization_y = polarization1.getY 860 G4double polarization_y = polarization1.getY();
943 G4double polarization_z = polarization1.getZ 861 G4double polarization_z = polarization1.getZ();
944 862
945 polarization1 = (polarization_x*Axis_X0 + po 863 polarization1 = (polarization_x*Axis_X0 + polarization_y*Axis_Y0 + polarization_z*Axis_Z0).unit();
946 864
947 } 865 }
948 866
949 867
950 //....oooOO0OOooo........oooOO0OOooo........oo 868 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
951 //....oooOO0OOooo........oooOO0OOooo........oo 869 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
952 870
>> 871 #include "G4AutoLock.hh"
>> 872 namespace { G4Mutex LivermorePolarizedComptonModelMutex = G4MUTEX_INITIALIZER; }
>> 873
953 void 874 void
954 G4LivermorePolarizedComptonModel::InitialiseFo 875 G4LivermorePolarizedComptonModel::InitialiseForElement(const G4ParticleDefinition*,
955 G4int Z) 876 G4int Z)
956 { 877 {
957 G4AutoLock l(&LivermorePolarizedComptonModel 878 G4AutoLock l(&LivermorePolarizedComptonModelMutex);
>> 879 // G4cout << "G4LivermoreComptonModel::InitialiseForElement Z= "
>> 880 // << Z << G4endl;
958 if(!data[Z]) { ReadData(Z); } 881 if(!data[Z]) { ReadData(Z); }
959 l.unlock(); 882 l.unlock();
960 } 883 }
961 884