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